OBC VOLUME 2 · SUPPLEMENTARY STANDARD SB-3Updated for the 2024 Ontario Building Code
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SB-3 — Fire and Sound Resistance Tables
Supplementary Standard SB-3 ("Fire and Sound Resistance Tables") forms part of Volume 2 of the 2024 Ontario Building Code. The full text is reproduced below with a linked table of contents.
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2024MMAH Supplementary Standard SB-3
SB-3 Fire and Sound Resistance Tables
(This Standard is based in large measure on the Fire and Sound Resistance Tables of the National Building Code of Canada
2020)
The following Tables may be used to select building assemblies for compliance with Articles 5.8.1.3., Sentence
9.10.3.1.(1), Articles 9.10.5.1., 9.11.1.3., 9.11.1.4. and Sentence 9.29.5.9.(5) of Division B of the 2024 Building Code.
Tables 1 and 2 have been developed from information gathered from tests. While a large number of the assemblies listed
were tested, the fire-resistance and acoustical ratings for others were assigned on the basis of extrapolation of information
from tests of similar assemblies. Where there was enough confidence relative to the fire performance of an assembly, the
fire-resistance ratings were assigned relative to the commonly used minimum ratings of 30 min, 45 min and 1 h, including
a designation of "< 30 min" for assemblies that are known not to meet the minimum 30-minute rating. Where there was
not enough comparative information on an assembly to assign to it a rating with confidence, its value in the Tables has
been left blank (hyphen), indicating that its rating remains to be assessed through another means
These Tables are provided only for the convenience of Code users and do not limit the number of assemblies permitted to
those in the Tables. The notes to Tables 1 and 2 are mandatory parts of the Tables and must be used by designers in
complying with the design requirements of a particular assembly. Assemblies not listed or not given a rating in these
Tables are equally acceptable provided their fire and sound resistance can be demonstrated to meet the above-noted
requirements either on the basis of tests referred to in Article 9.10.3.1. and Subsection 9.11.1. or by using the data in
MMAH Supplementary Standard SB-2, “Fire-Performance Ratings”. It should be noted, however, that Tables 1 and 2 of
this Supplementary Standard are not based on the same assumptions as those used in MMAH Supplementary Standard SB-
2. Assemblies in Tables 1 and 2 are described through their generic descriptions and variants and the important details
given in the notes to the Tables. Assumptions for MMAH Supplementary Standard SB-2 include different construction
details that must be followed rigorously for the calculated ratings to be expected. These are two different methods of
choosing assemblies that meet required fire ratings.
Table 2 presents fire-resistance and acoustical ratings for floor, ceiling and roof assemblies. The fire-resistance ratings are
appropriate for all assemblies conforming to the construction specifications given in Table 2, including applicable Table
notes. Acoustical ratings for assemblies decrease with decreasing depth and decreasing separation of the structural
members; the values listed for sound transmission class and impact insulation class are suitable for the minimum depth of
structural members identified in the description, including applicable Table notes, and for structural member spacing of
305 mm o.c., unless other values are explicitly listed for the assembly. Adjustments to the acoustical ratings to allow for
the benefit of deeper or more widely spaced structural members are given in Table Notes (9) and (10).
For wall, floor and ceiling assemblies, framing spacing previously specified as 16 and 24 inch on centre has been converted
to 406 and 610 mm respectively to represent actual framing spacing used in the field to accommodate modular sheathing
panel dimensions. These metric dimensions are deemed to comply with test results based on reported framing spacing of
400 mm or 600 mm on centre.
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Section 1 Fire and Sound Resistance of Walls
Table 1
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
• 38 mm x 89 mm wood studs spaced 406 mm or
610 mm o.c.
W1
• with or without absorptive material
• 1 layer of gypsum board on each side
W1 with
W1a • 89 mm thick absorptive material(6) 1h 1h 36
• 15.9 mm Type X gypsum board(7)
W1 with
45 min 45 min
W1b • 89 mm thick absorptive material(6) 34
[1 h](8) [1 h](8)
• 12.7 mm Type X gypsum board(7)
W1 with
30 min
W1c • 89 mm thick absorptive material(6) 30 min 32
[45 min](8)
• 12.7 mm regular gypsum board(7)(9)
W1 with
W1d • no absorptive material 1h 1h 32
• Wood Studs • 15.9 mm Type X gypsum board(7)
W1 with
• Single Row W1e • no absorptive material 45 min 45 min 32
• 12.7 mm Type X gypsum board(7)
• Loadbearing or
Non-Loadbearing • 38 mm x 89 mm wood studs spaced 406 mm or
610 mm o.c.
W2
• with or without absorptive material
• 2 layers of gypsum board on each side
W2 with
W2a • 89 mm thick absorptive material(6) 1.5 h 2h 38
• 15.9 mm Type X gypsum board(7)
W2 with
W2b • 89 mm thick absorptive material(6) 1h 1.5 h 38
• 12.7 mm Type X gypsum board(7)
W2 with
W2c • 89 mm thick absorptive material(6) 45 min 1h 36
• 12.7 mm regular gypsum board(7)
W2 with
W2d • no absorptive material 1.5 h 2h 36
• 15.9 mm Type X gypsum board(7)
Column 1 2 3 4 5 6
Page 2 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing Loadbearing (STC)
W2 with
W2e • no absorptive material 1h 1.5 h 35
• 12.7 mm Type X gypsum board(7)
W2 with
W2f • no absorptive material 45 min 1h 34
• 12.7 mm regular gypsum board(7)
• 38 mm x 89 mm wood studs spaced 406 mm or
610 mm o.c.
• 89 mm thick absorptive material(6)
W3
• resilient metal channels on one side spaced
406 mm or 610 mm o.c.
• 1 layer of gypsum board on each side
W3 with
W3a • studs spaced 406 mm o.c. 45 min 1h 45
• 15.9 mm Type X gypsum board(7)
W3 with
• studs spaced 610 mm o.c. 45 min 1h 48
W3b
• 15.9 mm Type X gypsum board(7)
• Wood Studs
W3 with
• Single Row W3c • studs spaced 406 mm or 610 mm o.c. 45 min 45 min 43
• 12.7 mm Type X gypsum board(7)
• Loadbearing or • 38 mm x 89 mm wood studs spaced 406 mm or
Non-Loadbearing 610 mm o.c.
• 89 mm thick absorptive material(6)
• resilient metal channels on one side spaced
W4
406 mm or 610 mm o.c.
• 2 layers of gypsum board on resilient metal channel
side
• 1 layer of gypsum board on other side
W4 with
1h
W4a • studs spaced 406 mm o.c. 1h 51
[1.5 h](8)
• 15.9 mm Type X gypsum board(7)
W4 with
1h
W4b • studs spaced 610 mm o.c. 1h 54
[1.5 h](8)
• 15.9 mm Type X gypsum board(7)
W4 with
45 min
W4c • studs spaced 406 mm o.c. 1h 49
[1 h](8)
• 12.7 mm Type X gypsum board(7)
W4 with
45 min
W4d • studs spaced 610 mm o.c. 1h 53
[1 h](8)
• 12.7 mm Type X gypsum board(7)
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
• 38 mm x 89 mm wood studs spaced 406 mm or
610 mm o.c.
• 89 mm thick absorptive material(6)
• resilient metal channels on one side spaced
W5
406 mm or 610 mm o.c.
• 1 layer of gypsum board on resilient metal
channel side
• 2 layers of gypsum board on other side
W5 with
W5a • studs spaced 406 mm o.c. 45 min 1h 51
• 15.9 mm Type X gypsum board(7)
W5 with
W5b • studs spaced 610 mm o.c. 45 min 1h 54
• 15.9 mm Type X gypsum board(7)
W5 with
W5c • studs spaced 406 mm o.c. 45 min 1h 49
• 12.7 mm Type X gypsum board(7)
W5 with
W5d • studs spaced 610 mm o.c. 45 min 1h 53
• Wood Studs • 12.7 mm Type X gypsum board(7)
• 38 mm x 89 mm wood studs spaced 406 mm or
• Single Row
610 mm o.c.
• Loadbearing or W6 • with or without absorptive material
Non-Loadbearing • resilient metal channels on one side
• 2 layers of gypsum board on each side
W6 with
• studs spaced 406 mm or 610 mm o.c.
W6a • 89 mm thick absorptive material(6) 1.5 h 2h 55
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board(7)
W6 with
• studs spaced 406 mm or 610 mm o.c. with blocking
at mid-height(10)
W6b • 89 mm thick rock or slag fibre insulation(11) 2h 2h –
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 15.9 mm Type X gypsum board(7)
W6 with
• studs spaced 406 mm o.c. with blocking at mid-
height(10)
W6c 2h 2h –
• 89 mm thick dry-blown cellulose fibre insulation(12)
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board(7)
Column 1 2 3 4 5 6
Page 4 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
W6 with
• studs spaced 406 mm or 610 mm o.c.
W6d • 89 mm thick absorptive material(6) 1.5 h 2h 58
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board(7)
W6 with
• studs spaced 406 mm o.c.
W6e • 89 mm thick absorptive material(6) 1h 1.5 h 53
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board(7)
W6 with
• studs spaced 406 mm o.c.
W6f • 89 mm thick absorptive material(6) 1h 1.5 h 55
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board(7)
W6 with
• Wood Studs
• studs spaced 610 mm o.c.
W6g • 89 mm thick absorptive material(6) 1h 1.5 h 55
• Single Row
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board(7)
• Loadbearing or
Non-Loadbearing W6 with
• studs spaced 610 mm o.c.
W6h • 89 mm thick absorptive material(6) 1h 1.5 h 58
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board(7)
W6 with
• studs spaced 406 mm or 610 mm o.c.
• no absorptive material
W6i • resilient metal channels spaced 406 mm or 1.5 h 2h 47
610 mm o.c.
• 15.9 mm Type X gypsum board(7)
W6 with
• studs spaced 406 mm or 610 mm o.c.
• no absorptive material
W6j 1h 1.5 h 46
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 12.7 mm Type X gypsum board(7)
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
• two rows 38 mm x 89 mm wood studs each spaced
406 mm or 610 mm o.c. staggered on common
38 mm x 140 mm plate
W7
• 89 mm thick absorptive material on one side or
65 mm thick on each side(6)
• 1 layer of gypsum board on each side
W7 with
W7a 1h 1h 47
• 15.9 mm Type X gypsum board(7)
• W7 with 45 min 45 min
W7b 45
• 12.7 mm Type X gypsum board(7) [1 h](8) [1 h](8)
W7 with 30 min
W7c 30 min 42
• 12.7 mm regular gypsum board(7)(9) [45 min](8)
• two rows 38 mm x 89 mm wood studs each spaced
406 mm or 610 mm o.c. staggered on common
38 mm x 140 mm plate
W8 • 89 mm thick absorptive material on one side or
• Wood Studs 65 mm thick on each side(6)
• 2 layers of gypsum board on one side
• Two Rows • 1 layer of gypsum board on other side
Staggered on
W8 with
38 mm x 140 mm W8a 1h 1.5 h 52
• 15.9 mm Type X gypsum board(7)
plate
W8 with
W8b 45 min 1h 50
• Loadbearing or • 12.7 mm Type X gypsum board(7)
Non-Loadbearing • two rows 38 mm x 89 mm wood studs each spaced
406 mm or 610 mm o.c. staggered on common
W9 38 mm x 140 mm plate
• with or without absorptive material
• 2 layers of gypsum board on each side
W9 with
• 89 mm thick absorptive material on one side or
W9a 1.5 h 2h 56
65 mm thick on each side(6)
• 15.9 mm Type X gypsum board(7)
W9 with
• 89 mm thick absorptive material on one side or
W9b 1h 1.5 h 55
65 mm thick on each side(6)
• 12.7 mm Type X gypsum board(7)
W9 with
• 89 mm thick absorptive material on one side or
W9c 45 min 1h 53
65 mm thick on each side(6)
• 12.7 mm regular gypsum board(7)
Column 1 2 3 4 5 6
Page 6 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
W9 with
W9d • no absorptive material 1.5 h 2h 48
• 15.9 mm Type X gypsum board(7)
• two rows 38 mm x 89 mm wood studs each spaced
406 mm or 610 mm o.c. staggered on common
38 mm x 140 mm plate
• with or without absorptive material
W10
• resilient metal channels on one side spaced
406 mm or 610 mm o.c.
• 2 layers of gypsum board on each side
W10 with
• 89 mm thick absorptive material on one side or
W10a 1.5 h 2h 62
65 mm thick on each side(6)
• 15.9 mm Type X gypsum board(7)
W10 with
• Wood Studs
• 89 mm thick absorptive material on one side or
W10b 1h 1.5 h 60
65 mm thick on each side(6)
• Two Rows
• 12.7 mm Type X gypsum board(7)
Staggered on
38 mm x 140 mm W10 with
plate W10c • no absorptive material 1.5 h 2h 50
• 15.9 mm Type X gypsum board(7)
• Loadbearing or
W10 with
Non-Loadbearing
W10d • no absorptive material 1h 1.5 h 48
• 12.7 mm Type X gypsum board(7)
• two rows 38 mm x 89 mm wood studs each spaced
406 mm or 610 mm o.c. staggered on common
38 mm x 140 mm plate
• 89 mm thick absorptive material on one side or
W11 65 mm thick on each side(6)
• resilient metal channels on one side spaced
406 mm or 610 mm o.c.
• 2 layers of gypsum board on resilient channel side
• 1 layer of gypsum board on other side
W11 with
W11a 1h 1h 56
• 15.9 mm Type X gypsum board(7)
W11 with 45 min
W11b 1h 54
• 12.7 mm Type X gypsum board(7) [1 h](8)
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Fire-Resistance Rating(2)(3)(4) Typical Sound
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
• two rows 38 mm x 89 mm wood studs each spaced
406 mm or 610 mm o.c. staggered on common
38 mm x 140 mm plate
• Wood Studs • 89 mm thick absorptive material on one side or
65 mm thick on each side(6)
• Two Rows W12
• resilient metal channels on one side spaced
Staggered on 406 mm or 610 mm o.c.
38 mm x 140 mm • 1 layer of gypsum board on resilient metal channel
plate side
• 2 layers of gypsum board on other side
• Loadbearing or
Non-Loadbearing W12 with
W12a 45 min 1h 56
• 15.9 mm Type X gypsum board(7)
W12 with
W12b 45 min 1h 54
• 12.7 mm Type X gypsum board(7)
• two rows 38 mm x 89 mm wood studs each spaced
406 mm or 610 mm o.c. on separate 38 mm x
W13 89 mm plates set 25 mm apart
• with or without absorptive material
• 1 layer of gypsum board on each side
W13 with
W13a • 89 mm thick absorptive material on each side(6)(13) 1h 1h 57
• 15.9 mm Type X gypsum board(7)
• Wood Studs W13 with
45 min 45 min
W13b • 89 mm thick absorptive material on each side(6)(13) 57
• Two Rows on [1 h](8) [1 h](8)
• 12.7 mm Type X gypsum board(7)
Separate Plates
W13 with
• Loadbearing or W13c • 89 mm thick absorptive material on one side only(6)(13) 1h 1h 54
Non-Loadbearing • 15.9 mm Type X gypsum board(7)
W13 with
W13d • 89 mm thick absorptive material on one side only(6)(13) 45 min 45 min 53
• 12.7 mm Type X gypsum board(7)
W13 with
W13e • no absorptive material 1h 1h 45
• 15.9 mm Type X gypsum board(7)
W13 with
W13f • no absorptive material 45 min 45 min 45
• 12.7 mm Type X gypsum board(7)
Column 1 2 3 4 5 6
Page 8 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Fire-Resistance Rating(2)(3)(4) Typical Sound
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
• two rows 38 mm x 89 mm wood studs each spaced
406 mm or 610 mm o.c. on separate 38 mm x
89 mm plates set 25 mm apart
W14
• with or without absorptive material
• 2 layers of gypsum board on one side
• 1 layer of gypsum board on other side
W14 with
1h
W14a • 89 mm thick absorptive material on each side(6)(13) 1h 61
[1.5 h](8)
• 15.9 Type X gypsum board(7)
W14 with
W14b • 89 mm thick absorptive material on each side(6)(13) 45 min 1h 61
• 12.7 Type X gypsum board(7)
• with
W14
W14c • 89 mm thick absorptive material on one side only(6)(13) 1h 1h 57
• 15.9 Type X gypsum board(7)
W14 with
W14d • 89 mm thick absorptive material on one side only(6)(13) 45 min 1h 57
• Wood Studs • 12.7 Type X gypsum board(7)
W14 with
• Two Rows on W14e • no absorptive material 1h 1h 51
Separate Plates • 15.9 Type X gypsum board(7)
• Loadbearing or W14 with
Non-Loadbearing W14f • no absorptive material 45 min 1h 51
• 12.7 Type X gypsum board(7)
• two rows 38 mm x 89 mm wood studs each spaced
406 mm or 610 mm o.c. on separate 38 mm x
W15 89 mm plates set 25 mm apart
• with or without absorptive material
• 2 layers of gypsum board on each side
W15 with
W15a • 89 mm thick absorptive material on each side(6)(13) 1.5 h 2h 66
• 15.9 mm Type X gypsum board(7)
W6 with
W15b • 89 mm thick absorptive material on each side(6)(13) 1h 1.5 h 65
• 12.7 mm Type X gypsum board(7)
W15 with
W15c • 89 mm thick absorptive material on each side(6)(13) 45 min 1h 61
• 12.7 mm regular gypsum board(7)
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
W15 with
• 89 mm thick absorptive material on one side
W15d 1.5 h 2h 62
only(6)(13)
• 15.9 mm Type X gypsum board(7)
W15 with
• 89 mm thick absorptive material on one side
W15e 1h 1.5 h 60
only(6)(13)
• 12.7 mm Type X gypsum board(7)
W15 with
• 89 mm thick absorptive material on one side
W15f 45 min 1h 57
only(6)(13)
• 12.7 mm regular gypsum board(7)
W15 with
W15g • no absorptive material 1.5 h 2h 56
• 15.9 mm Type X gypsum board(7)
W15 with
W15h • no absorptive material 1h 1.5 h 55
• Wood Studs
• 12.7 mm Type X gypsum board(7)
• Two Rows on W15 with
Separate Plates W15i • no absorptive material 45 min 1h 51
• 12.7 mm regular gypsum board(7)
• Loadbearing or
Non-Loadbearing • two rows 38 mm x 89 mm studs, each spaced
406 mm or 610 mm o.c. on separate 38 mm x 89
mm plates set 25 mm apart
W16 • resilient metal channels on one side spaced 406 mm
or 610 mm o.c.
• with or without absorptive material
• 2 layers of gypsum board on each side
W16 with
W16a • 89 mm thick absorptive material on each side(6)(13) 1.5 h 2h 66
• 15.9 mm Type X gypsum board(7)
W16 with
• studs spaced 406 mm o.c. with blocking at mid-
height(10)
• 89 mm thick rock or slag fibre insulation on each
W16b 2h 2h –
side(11)
• resilient metal channels on one side spaced
406 mm o.c.
• 15.9 mm Type X gypsum board(7)(14)
Column 1 2 3 4 5 6
Page 10 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
W16 with
W16c • 89 mm thick absorptive material on each side(6)(13) 1h 1.5 h 65
• 12.7 mm Type X gypsum board(7)
W16 with
• 89 mm thick absorptive material on one side
W16d 1.5 h 2h 62
only(6)(13)
• Wood Studs
• 15.9 mm Type X gypsum board(7)
• Two Rows on W16 with
Separate Plates • 89 mm thick absorptive material on one side
W16e 1h 1.5 h 60
only(6)(13)
• Loadbearing or • 12.7 mm Type X gypsum board(7)
Non-Loadbearing
W16 with
W16f • no absorptive material 1.5 h 2h 56
• 12.7 mm regular gypsum board(7)
W16 with
W16g • no absorptive material 1h 1.5 h 55
• 15.9 mm Type X gypsum board(7)
• wood studs
• rock or slag fibre insulation(11)
EW1
• 1 layer of gypsum board on inside
• exterior sheathing and cladding
EW1 with
• 38 mm x 89 mm wood studs spaced 406 mm or
610 mm o.c.
EW1a 1h 1h N/A
• Exterior • 15.9 mm Type X gypsum board(7)(15)(16)
• exterior OSB or plywood sheathing(17) or exterior
• Wood Studs gypsum sheathing(18) and cladding(19)
EW1 with
• Single Row • 38 mm x 89 mm studs spaced 406 mm or
610 mm o.c.
• Loadbearing and EW1b 45 min 1h N/A
• 15.9 mm Type X gypsum board(7)(15)
Non-Loadbearing • exterior OSB or plywood sheathing(17) or exterior
gypsum sheathing(18) and cladding(19)
EW1 with
• 38 mm x 89 mm studs spaced 406 mm or
610 mm o.c.
EW1c 45 min 1h N/A
• 12.7 mm Type X gypsum board(7)(15)(16)
• exterior OSB or plywood sheathing(17) or exterior
gypsum sheathing(18) and cladding(19)
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
EW1 with
• 38 mm x 89 mm studs spaced 406 mm or
610 mm o.c.
EW1d – 45 min N/A
• 12.7 mm Type X gypsum board(7)(15)
• exterior OSB or plywood sheathing(17) or exterior
gypsum sheathing(18) and cladding(19)
EW1 with
• 38 mm x 140 mm studs spaced 406 mm o.c.
• 15.9 mm Type X gypsum board(7)(15)(16)
EW1e 45 min 45 min N/A
• exterior wood sheathing, exterior gypsum sheathing,
or insulated exterior sheathing(20)
• masonry veneer cladding not less than 89 mm thick
• wood studs
• glass fibre insulation(21)
EW2
• 1 layer of gypsum board on inside
• Exterior • exterior sheathing and cladding
EW2 with
• Wood Studs
• 38 mm × 89 mm studs spaced 406 mm o.c.
EW2a • 15.9 mm Type X gypsum board(7)(15)(22) 1h 1h N/A
• Single Row
• exterior OSB or plywood sheathing(17) or exterior
gypsum sheathing(23) and cladding(19)
• Loadbearing and
Non-Loadbearing EW2 with
• 38 mm x 89 mm studs spaced 406 mm or
610 mm o.c.
EW2b 45 min 1h N/A
• 15.9 mm Type X gypsum board(7)(15)(16)
• exterior OSB or plywood sheathing(17) or exterior
gypsum sheathing(18) and cladding(19)
EW2 with
• 38 mm x 89 mm studs spaced at 406 mm o.c.
EW2c • 15.9 mm Type X gypsum board(7)(15) 45 min 1h N/A
• exterior OSB or plywood sheathing(17) and
cladding(19)
EW2 with
• 38 mm x 89 mm studs spaced at 610 mm o.c.
EW2d • 15.9 mm Type X gypsum board(7)(15) -– 45 min N/A
• exterior OSB or plywood sheathing(17) and
cladding(19)
Column 1 2 3 4 5 6
Page 12 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
EW2 with
• 38 mm x 89 mm studs spaced 406 mm or
EW2e 610 mm o.c. -– 45 min N/A
• 15.9 mm Type X gypsum board(7)(15)
• exterior gypsum sheathing(18) and cladding(19)
EW2 with
• 38 mm x 89 mm studs spaced at 406 mm o.c.
EW2f 45 min 1h N/A
• 12.7 mm Type X gypsum board(7)(15)(16)
exterior OSB or plywood sheathing(17) and cladding(19)
EW2 with
• 38 mm x 89 mm studs spaced at 610 mm o.c.
EW2g • 12.7 mm Type X gypsum board(7)(15)(16) – 45 min N/A
• exterior OSB or plywood sheathing(17) and
cladding(19)
EW2 with
• 38 mm x 89 mm studs spaced 406 mm or
• Exterior EW2h 610 mm o.c. – 45 min N/A
• 12.7 mm Type X gypsum board(7)(15)(16)
• Wood Studs • exterior gypsum sheathing(18) and cladding(19)
• Single Row EW2 with
• 38 mm x 89 mm studs spaced at 406 mm o.c.
• Loadbearing and EW2i • 12.7 mm Type X gypsum board(7)(15) – 45 min N/A
Non-Loadbearing • exterior OSB or plywood sheathing(17) and
cladding(19)
EW2 with
• 38 mm x 140 mm studs spaced at 406 mm o.c.
• 15.9 mm Type X gypsum board(7)(15)(16)
EW2j 45 min 45 min N/A
• exterior wood sheathing, exterior gypsum sheathing
or insulated exterior sheathing(20)
• masonry veneer cladding not less than 89 mm thick
• wood studs
• dry-blown cellulose fibre insulation(12)
EW3
• 1 layer of gypsum board on inside
• exterior sheathing and cladding
EW3 with
• 38 mm x 89 mm studs spaced at 406 mm o.c.
EW3a • 15.9 mm Type X gypsum board(7)(15)(16) 1h 1h N/A
• exterior OSB or plywood sheathing(17) or exterior
gypsum sheathing(18) and cladding(19)
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
EW3 with
• 38 mm x 89 mm studs spaced at 610 mm o.c.
EW3b • 15.9 mm Type X gypsum board(7)(15)(16) 1h 1h N/A
• exterior OSB or plywood sheathing(17) and
cladding(19)
EW3 with
• 38 mm x 89 mm studs spaced at 610 mm o.c.
EW3c 45 min 1h N/A
• 15.9 mm Type X gypsum board(7)(15)(16)
exterior gypsum sheathing(18) and cladding(19)
EW3 with
• 38 mm x 89 mm studs spaced at 406 mm o.c.
EW3d • 15.9 mm Type X gypsum board(7)(15) 45 min 1h N/A
exterior OSB or plywood sheathing(17) or exterior
• Exterior gypsum sheathing(18) and cladding(19)
EW3 with
• Wood Studs
• 38 mm x 89 mm studs spaced at 610 mm o.c.
EW3e • 15.9 mm Type X gypsum board(7)(15) 45 min 1h N/A
• Single Row
• exterior OSB or plywood sheathing(17) and
cladding(19)
• Loadbearing and
Non-Loadbearing EW3 with
• 38 mm x 89 mm studs spaced at 406 mm o.c.
EW3f • 12.7 mm Type X gypsum board(7)(15)(16) 45 min 1h N/A
• exterior OSB or plywood sheathing(17) or exterior
gypsum sheathing(18) and cladding(19)
EW3 with
• 38 mm x 89 mm studs spaced at 610 mm o.c.
EW3g • 12.7 mm Type X gypsum board(7)(15)(16) 45 min 1h N/A
• exterior OSB or plywood sheathing(17) and
cladding(19)
EW3 with
• 38 mm x 89 mm studs spaced at 610 mm o.c.
EW3h — 45 min N/A
• 12.7 mm Type X gypsum board(7)(15)(16)
• exterior gypsum sheathing(18) and cladding(19)
Column 1 2 3 4 5 6
Page 14 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
EW3 with
• 38 mm x 89 mm studs spaced at 406 mm o.c.
EW3i • 12.7 mm Type X gypsum board(7)(15) — 45 min N/A
• exterior OSB or plywood sheathing(17) or exterior
gypsum sheathing(18) and cladding(19)
• Exterior
EW3 with
• Wood Studs • 38 mm x 89 mm studs spaced at 610 mm o.c.
EW3j • 12.7 mm Type X gypsum board(7)(15) — 45 min N/A
• Single Row • exterior OSB or plywood sheathing(17) and
cladding(19)
• Loadbearing and EW3 with
Non-Loadbearing • 38 mm x 140 mm studs spaced at 406 mm o.c.
• 15.9 mm Type X gypsum board(7)(15)(16)
EW3k 45 min 45 min N/A
• exterior wood sheathing, exterior gypsum sheathing
or insulated exterior sheathing(20)
• masonry veneer cladding not less than 89 mm thick
• 31 mm x 64 mm steel studs spaced 406 mm or
610 mm o.c.
S1
• with or without absorptive material
• 1 layer of gypsum board on each side
S1 with
• studs spaced 610 mm o.c. 45 min
S1a — 43
• 65 mm thick absorptive material(6) [1 h](8)
• Non-Loadbearing
Steel Studs • 15.9 mm Type X gypsum board(7)
S1 with
• 0.46 mm (25 Gauge) • studs spaced 406 mm o.c. 45 min
S1b — 39
• 65 mm thick absorptive material(6) [1 h](8)
• 15.9 mm Type X gypsum board(7)
S1 with
• studs spaced 406 mm or 610 mm o.c.
S1c — 45 min 35
• no absorptive material
• 15.9 mm Type X gypsum board(7)
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
• 31 mm x 64 mm steel studs spaced 406 mm or
610 mm o.c.
S2 • with or without absorptive material
• 1 layer of gypsum board on one side
• 2 layers of gypsum board on other side
S2 with
• studs spaced 610 mm o.c.
S2a — 1h 50
• 65 mm thick absorptive material(6)
• 15.9 mm Type X gypsum board(7)
S2 with
• studs spaced 406 mm o.c.
S2b — 1h 44
• 65 mm thick absorptive material(6)
• 15.9 mm Type X gypsum board(7)
S2 with
• studs spaced 610 mm o.c.
S2c — 1h 50
• 65 mm thick absorptive material(6)
• Non-Loadbearing • 12.7 mm Type X gypsum board(7)
Steel Studs S2 with
• studs spaced 406 mm o.c.
• 0.46 mm (25 Gauge) S2d — 1h 42
• 65 mm thick absorptive material(6)
• 12.7 mm Type X gypsum board(7)
S2 with
• studs spaced 610 mm o.c.
S2e — 1h 41
• no absorptive material
• 15.9 mm Type X gypsum board(7)
S2 with
• studs spaced 406 mm o.c.
S2f — 1h 37
• no absorptive material
• 15.9 mm Type X gypsum board(7)
S2 with
• studs spaced 610 mm o.c.
S2g — 1h 40
• no absorptive material
• 12.7 mm Type X gypsum board(7)
S2 with
• studs spaced 406 mm o.c.
S2h — 1h 35
• no absorptive material
• 12.7 mm Type X gypsum board(7)
Column 1 2 3 4 5 6
Page 16 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
• 31 mm x 64 mm steel studs spaced 406 mm or
610 mm o.c.
S3
• with or without absorptive material
• 2 layers of gypsum board on each side
S3 with
• studs spaced 610 mm o.c.
S3a — 2h 54
• 65 mm thick absorptive material(6)
• 15.9 mm Type X gypsum board(7)
S3 with
• studs spaced 406 mm o.c.
S3b — 2h 51
• 65 mm thick absorptive material(6)
• 15.9 mm Type X gypsum board(7)
S3 with
• studs spaced 610 mm o.c.
S3c — 1.5 h 53
• 65 mm thick absorptive material(6)
• 12.7 mm Type X gypsum board(7)
S3 with
• studs spaced 406 mm o.c.
S3d — 1.5 h 47
• 65 mm thick absorptive material(6)
• 12.7 mm Type X gypsum board(7)
• Non-Loadbearing S3 with
Steel Studs • studs spaced 610 mm o.c.
S3e — 1h 49
• 65 mm thick absorptive material(6)
• 0.46 mm (25 Gauge) • 12.7 mm regular gypsum board(7)
S3 with
• studs spaced 406 mm o.c.
S3f — 1h 41
• 65 mm thick absorptive material(6)
• 12.7 mm regular gypsum board(7)
S3 with
• studs spaced 610 mm o.c.
S3g — 2h 45
• no absorptive material
• 15.9 mm Type X gypsum board(7)
S3 with
• studs spaced 406 mm o.c.
S3h — 2h 42
• no absorptive material
• 15.9 mm Type X gypsum board(7)
S3 with
• studs spaced 610 mm o.c.
S3i — 1.5 h 44
• no absorptive material
• 12.7 mm Type X gypsum board(7)
S3 with
• studs spaced 406 mm o.c.
S3j — 1.5 h 39
• no absorptive material
• 12.7 mm Type X gypsum board(7)
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
S3 with
• studs spaced 610 mm o.c.
S3k — 1h 40
• no absorptive material
• 12.7 mm regular gypsum board(7)
S3 with
• studs spaced 406 mm o.c.
S3l — 1h 37
• no absorptive material
• 12.7 mm regular gypsum board(7)
• 31 mm x 92 mm steel studs spaced 406 mm or
610 mm o.c.
S4
• with or without absorptive material
• 1 layer of gypsum board on each side
S4 with
• studs spaced 610 mm o.c. 45 min
S4a — 48
• 89 mm thick absorptive material(6) [1 h](8)
• 15.9 mm Type X gypsum board(7)
S4 with
• studs spaced 406 mm o.c. 45 min
S4b — 47
• 89 mm thick absorptive material(6) [1 h](8)
• Non-Loadbearing • 15.9 mm Type X gypsum board(7)
Steel Studs
S4 with
• 0.46 mm (25 Gauge) • studs spaced 610 mm o.c.
S4c — 45 min 38
• no absorptive material
• 15.9 mm Type X gypsum board(7)
S4 with
• studs spaced 406 mm o.c.
S4d — 45 min 38
• no absorptive material
• 15.9 mm Type X gypsum board(7)
• 31 mm x 92 mm steel studs spaced 406 mm or
610 mm o.c.
S5 • with or without absorptive material
• 1 layer of gypsum board on one side
• 2 layers of gypsum board on other side
S5 with
• studs spaced 610 mm o.c. 1h
S5a — 53
• 89 mm thick absorptive material(6) [1.5 h](8)
• 15.9 mm Type X gypsum board(7)
S5 with
• studs spaced 406 mm o.c. 1h
S5b — 52
• 89 mm thick absorptive material(6) [1.5 h](8)
• 15.9 mm Type X gypsum board(7)
Column 1 2 3 4 5 6
Page 18 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
S5 with
• studs spaced 610 mm o.c. 1h
S5c — 51
• 89 mm thick absorptive material(6) [1.5 h](8)
• 12.7 mm Type X gypsum board(7)
S5 with
• studs spaced 406 mm o.c. 1h
S5d — 50
• 89 mm thick absorptive material(6) [1.5 h](8)
• 12.7 mm Type X gypsum board(7)
S5 with
• studs spaced 610 mm o.c.
S5e — 1h 43
• no absorptive material
• 15.9 mm Type X gypsum board(7)
S5 with
• studs spaced 406 mm o.c.
S5f — 1h 42
• no absorptive material
• 15.9 mm Type X gypsum board(7)
• Non-Loadbearing S5 with
Steel Studs • studs spaced 610 mm o.c.
S5g — 1h 41
• no absorptive material
• 0.46 mm (25 Gauge) • 12.7 mm Type X gypsum board(7)
S5 with
• studs spaced 406 mm o.c.
S5h — 1h 40
• no absorptive material
• 12.7 mm Type X gypsum board(7)
• 31 mm x 92 mm steel studs spaced 406 mm or
610 mm o.c.
S6
• with or without absorptive material
• 2 layers of gypsum board on each side
S6 with
• studs spaced 610 mm o.c.
S6a — 2h 56
• 89 mm thick absorptive material(6)
• 15.9 mm Type X gypsum board(7)
S6 with
• studs spaced 406 mm o.c.
S6b — 2h 55
• 89 mm thick absorptive material(6)
• 15.9 mm Type X gypsum board(7)
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
S6 with
• studs spaced 610 mm o.c.
S6c — 1.5 h 55
• 89 mm thick absorptive material(6)
• 12.7 mm Type X gypsum board(7)
S6 with
• studs spaced 406 mm o.c.
S6d — 1.5 h 54
• 89 mm thick absorptive material(6)
• 12.7 mm Type X gypsum board(7)
S6 with
• studs spaced 610 mm o.c.
S6e — 1h 50
• 89 mm thick absorptive material(6)
• 12.7 mm regular gypsum board(7)
S6 with
• studs spaced 406 mm o.c.
S6f — 1h 48
• 89 mm thick absorptive material(6)
• 12.7 mm regular gypsum board(7)
S6 with
• studs spaced 610 mm o.c.
S6g — 2h 47
• Non-Loadbearing • no absorptive material
Steel Studs • 15.9 mm Type X gypsum board(7)
S6 with
• 0.46 mm (25 Gauge) • studs spaced 406 mm o.c.
S6h — 2h 45
• no absorptive material
• 15.9 mm Type X gypsum board(7)
S6 with
• studs spaced 610 mm o.c.
S6i — 1.5 h 45
• no absorptive material
• 12.7 mm Type X gypsum board(7)
S6 with
• studs spaced 406 mm o.c.
S6j — 1.5 h 44
• no absorptive material
• 12.7 mm Type X gypsum board(7)
S6 with
• studs spaced 610 mm o.c.
S6k — 1h 41
• no absorptive material
• 12.7 mm regular gypsum board(7)
S6 with
• studs spaced 406 mm o.c.
S6l — 1h 39
• no absorptive material
• 12.7 mm regular gypsum board(7)
Column 1 2 3 4 5 6
Page 20 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
• 31 mm x 152 mm steel studs spaced 406 mm or
610 mm o.c.
S7
• with or without absorptive material
• 1 layer of gypsum board on each side
S7 with
45 min
S7a • 150 mm thick absorptive material(6) — 51
[1 h](8)
• 15.9 mm Type X gypsum board(7)
S7 with
S7b • no absorptive material — 45 min 41
• 15.9 mm Type X gypsum board(7)
• 31 mm x 152 mm steel studs spaced 406 mm or
610 mm o.c.
S8 • with or without absorptive material
• 1 layer of gypsum board on one side
• 2 layers of gypsum board on other side
S8 with
1h
S8a • 150 mm thick absorptive material(6) — 55
• Non-Loadbearing [1.5 h](8)
• 15.9 mm Type X gypsum board(7)
Steel Studs S8 with
1h
S8b • 150 mm thick absorptive material(6) — 54
• 0.46 mm (25 Gauge) [1.5 h](8)
• 12.7 mm Type X gypsum board(7)
S8 with
S8c • no absorptive material — 1h 45
• 15.9 mm Type X gypsum board(7)
S8 with
S8d • no absorptive material — 1h 44
• 12.7 mm Type X gypsum board(7)
• 31 mm x 152 mm steel studs spaced 406 mm or
610 mm o.c.
S9
• with or without absorptive material
• 2 layers of gypsum board on each side
S9 with
S9a • 150 mm thick absorptive material(6) — 2h 59
• 15.9 mm Type X gypsum board(7)
S9 with
S9b • 150 mm thick absorptive material(6) — 1.5 h 57
• 12.7 mm Type X gypsum board(7)
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
S9 with
S9c • 150 mm thick absorptive material(6) — 1h 53
• 12.7 mm regular gypsum board(7)
S9 with
• Non-Loadbearing S9d • no absorptive material — 2h 49
Steel Studs • 15.9 mm Type X gypsum board(7)
S9 with
• 0.46 mm (25 Gauge) S9e • no absorptive material — 1.5 h 47
• 12.7 mm Type X gypsum board(7)
S9 with
S9f • no absorptive material — 1h 43
• 12.7 mm regular gypsum board(7)
• 41 mm x 92 mm loadbearing steel studs spaced
406 mm or 610 mm o.c.
S10 • with or without cross-bracing on one side
• with or without absorptive material
• 2 layers of gypsum board on each side
S10 with
S10a • 89 mm thick absorptive material(6) 1h — 38
• 15.9 mm Type X gypsum board(7)
S10 with
45 min
S10b • 89 mm thick absorptive material(6) — 38
• Loadbearing Steel [1 h](8)
• 12.7 mm Type X gypsum board(7)
Studs
S10 with
• 0.84 mm to 1.52 mm S10c • 89 mm thick absorptive material(6) — — 36
thickness • 12.7 mm regular gypsum board(7)
S10 with
S10d • no absorptive material 1h — 36
• 15.9 mm Type X gypsum board(7)
S10 with
S10e • no absorptive material 1h — 35
• 12.7 mm Type X gypsum board(7)
S10 with
S10f • no absorptive material — — 34
• 12.7 mm regular gypsum board(7)
Column 1 2 3 4 5 6
Page 22 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
• 41 mm x 92 mm loadbearing steel studs spaced
406 mm or 610 mm o.c.
• with or without cross-bracing on one side
S11
• with or without absorptive material
• resilient metal channels on one side
• 1 layer of gypsum board on each side
S11 with
• 89 mm thick absorptive material(6)
S11a — — 50
• resilient metal channels spaced at 610 mm o.c.
• 15.9 mm Type X gypsum board(7)
S11 with
• 89 mm thick absorptive material(6)
S11b — — 47
• resilient metal channels spaced at 406 mm o.c.
• 15.9 mm Type X gypsum board(7)
S11 with
• no absorptive material
S11c — — 41
• resilient metal channels spaced at 610 mm o.c.
• Loadbearing Steel • 15.9 mm Type X gypsum board(7)
Studs
S11 with
• no absorptive material
• 0.84 mm to 1.52 mm S11d — — 39
• resilient metal channels spaced at 406 mm o.c.
thickness
• 15.9 mm Type X gypsum board(7)
S11 with
• 89 mm thick absorptive material(6)
S11e — — 47
• resilient metal channels spaced at 610 mm o.c.
• 12.7 mm Type X gypsum board(7)
S11 with
• 89 mm thick absorptive material(6)
S11f — — 45
• resilient metal channels spaced at 406 mm o.c.
• 12.7 mm Type X gypsum board(7)
S11 with
• no absorptive material
S11g — — 38
• resilient metal channels spaced at 610 mm o.c.
• 12.7 mm Type X gypsum board(7)
S11 with
• no absorptive material
S11h — — 36
• resilient metal channels spaced at 406 mm o.c.
• 12.7 mm Type X gypsum board(7)
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
• 41 mm x 92 mm loadbearing steel studs spaced
406 mm or 610 mm o.c.
• with or without cross-bracing on one side
S12 • with or without absorptive material
• resilient metal channels on one side
• 2 layers of gypsum board on resilient channel side
• 1 layer of gypsum board on other side
S12 with
• 89 mm thick absorptive material(6)
S12a — — 54
• resilient metal channels spaced at 610 mm o.c.
• 15.9 mm Type X gypsum board(7)
S12 with
• 89 mm thick absorptive material(6)
S12b — — 52
• resilient metal channels spaced at 406 mm o.c.
• 15.9 mm Type X gypsum board(7)
S12 with
• no absorptive material
S12c — — 46
• resilient metal channels spaced at 610 mm o.c.
• Loadbearing Steel
• 15.9 mm Type X gypsum board(7)
Studs
S12 with
• 0.84 mm to 1.52 mm • no absorptive material
S12d — — 43
thickness • resilient metal channels spaced at 406 mm o.c.
• 15.9 mm Type X gypsum board(7)
S12 with
• 89 mm thick absorptive material(6)
S12e — — 52
• resilient metal channels spaced at 610 mm o.c.
• 12.7 mm Type X gypsum board(7)
S12 with
• 89 mm thick absorptive material(6)
S12f — — 50
• resilient metal channels spaced at 406 mm o.c.
• 12.7 mm Type X gypsum board(7)
S12 with
• no absorptive material
S12g — — 43
• resilient metal channels spaced at 610 mm o.c.
• 12.7 mm Type X gypsum board(7)
S12 with
• no absorptive material
S12h — — 41
• resilient metal channels spaced at 406 mm o.c.
• 12.7 mm Type X gypsum board(7)
Column 1 2 3 4 5 6
Page 24 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
• 41 mm x 92 mm loadbearing steel studs spaced
406 mm or 610 mm o.c.
• with or without absorptive material
• resilient metal channels on one side spaced at
S13
406 mm o.c.
• 2 layers of gypsum board on resilient channel side
• 1 layer shear membrane and 1 layer gypsum board
on other side
S13 with
• 89 mm thick absorptive material(6)
S13a 30 min — 57
• 12.7 mm OSB shear membrane
• 12.7 mm Type X gypsum board(7)
• 41 mm x 92 mm loadbearing steel studs spaced
406 mm or 610 mm o.c.
S14 • with or without absorptive material
• resilient metal channels on one side
• 2 layers of gypsum board on each side
S14 with
• Loadbearing Steel • 89 mm thick absorptive material(6)
S14a 1h — 60
Studs • resilient metal channels spaced at 610 mm o.c.
• 15.9 mm Type X gypsum board(7)
• 0.84 mm to 1.52 mm S14 with
thickness • 89 mm thick absorptive material(6) 45 min
S14b — 57
• resilient metal channels spaced at 610 mm o.c. [1 h](8)
• 12.7 mm Type X gypsum board(7)
S14 with
• 89 mm thick absorptive material(6)
S14c — — 54
• resilient metal channels spaced at 610 mm o.c.
• 12.7 mm regular gypsum board(7)
S14 with
• 89 mm thick absorptive material 45 min
S14d — 55
• resilient metal channels spaced at 406 mm o.c. [1 h](8)
• 12.7 mm Type X gypsum board(7)
S14 with
• no absorptive material
S14e 1h — 51
• resilient metal channels spaced at 610 mm o.c.
• 15.9 mm Type X gypsum board(7)
S14 with
• no absorptive material
S14f — — 45
• resilient metal channels spaced at 610 mm o.c.
• 12.7 mm regular gypsum board(7)
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
S14 with
• no absorptive material
S14g 1h — 47
• resilient metal channels spaced at 406 mm o.c.
• 12.7 mm Type X gypsum board(7)
S14 with
• studs at 610 mm o.c.
S14h • 89 mm thick absorptive material 1h — 60
• resilient metal channels spaced at 406 mm o.c.
• 15.9 mm Type X gypsum board(7)
S14 with
• studs at 406 mm o.c.
S14i • 89 mm thick absorptive material 1h — 58
• resilient metal channels spaced at 406 mm o.c.
• 15.9 mm Type X gypsum board(7)
S14 with
• studs at 610 mm o.c.
S14j • no absorptive material 1h — 51
• resilient metal channels spaced at 406 mm o.c.
• Loadbearing Steel • 15.9 mm Type X gypsum board(7)
Studs
S14 with
• 0.84 mm to 1.52 mm • studs at 406 mm o.c.
thickness S14k • no absorptive material 1h — 49
• resilient metal channels spaced at 406 mm o.c.
• 15.9 mm Type X gypsum board(7)
S14 with
• studs at 406 mm o.c.
S14l • no absorptive material 1h — 49
• resilient metal channels spaced at 610 mm o.c.
• 12.7 mm Type X gypsum board(7)
S14 with
• studs at 610 mm o.c.
S14m • no absorptive material 1h — 50
• resilient metal channels spaced at 610 mm o.c.
• 12.7 mm regular gypsum board(7)
• 2 rows of 41 mm x 92 mm loadbearing steel studs
spaced 406 mm or 610 mm o.c. staggered on
152 mm common plate
S15
• with cross-bracing
• with or without absorptive material
• 2 layers of gypsum board on each side
Column 1 2 3 4 5 6
Page 26 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Fire-Resistance Rating(2)(3)(4) Typical Sound
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing (STC)
Loadbearing
S15 with
S15a • 89 mm thick absorptive material in each cavity(6) 1h — 68
• 15.9 mm Type X gypsum board(7)
S15 with
• Loadbearing Steel S15b • 89 mm thick absorptive material in each cavity(6) 1h — 68
Studs • 12.7 mm Type X gypsum board(7)
S15 with
• 0.84 mm to 1.52 mm
S15c • no absorptive material 1.5 h — 52
thickness
• 15.9 mm Type X gypsum board(7)
S15 with
S15d • no absorptive material 1h — 52
• 12.7 mm Type X gypsum board(7)
B1 • 140 mm or 190 mm concrete block
B1a • 140 mm bare concrete block(5) 1h 1h 48
B1b • 190 mm bare concrete block(5) 1.5 h 1.5 h 50
• 140 mm or 190 mm concrete block
• no absorptive material
B2
• 1 layer of gypsum-sand plaster or gypsum board on
each side
• Hollow Concrete B2 with
Block (Normal B2a • 140 mm concrete block 2h 2h 50
Weight Aggregate) • 12.7 mm gypsum-sand plaster
B2 with
• 140 mm concrete block
B2b 2h 2h 47
• 12.7 mm Type X gypsum board or 15.9 mm Type X
gypsum board(7)
B2 with
B2c • 140 mm concrete block 1.5 h 1.5 h 46
• 12.7 mm regular gypsum board(7)
B2 with
B2d • 190 mm concrete block 2.5 h 2.5 h 51
• 12.7 mm gypsum-sand plaster
B2 with
B2e • 190 mm concrete block 3h 3h 50
• 15.9 mm Type X gypsum board(7)
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing
Loadbearing (STC)
B2 with
B2f • 190 mm concrete block 2.5 h 2.5 h 49
• 12.7 mm Type X gypsum board(7)
B2 with
B2g • 190 mm concrete block 2h 2h 48
• 12.7 mm regular gypsum board(7)
• 140 mm or 190 mm concrete block
• resilient metal channels on one side spaced at
406 mm or 610 mm o.c.
B3
• absorptive material filling resilient metal channel
space(6)
• 1 layer of gypsum board on each side
B3 with
• 140 mm concrete block
B3a 2h 2h 51
• 12.7 mm Type X gypsum board or 15.9 mm Type X
gypsum board(7)
B3 with
B3b • 140 mm concrete block 1.5 h 1.5 h 48
• 12.7 mm regular gypsum board(7)(9)
• Hollow Concrete B3 with
Block (Normal B3c • 190 mm concrete block 3h 3h 54
Weight Aggregate) • 15.9 mm Type X gypsum board(7)
B3 with
B3d • 190 mm concrete block 2.5 h 2.5 h 53
• 12.7 mm Type X gypsum board(7)
B3 with
B3e • 190 mm concrete block 2h 2h 51
• 12.7 mm regular gypsum board(7)(9)
• 140 mm or 190 mm concrete block
• resilient metal channels on each side spaced at
B4 406 mm or 610 mm o.c.
• with or without absorptive material
• 1 layer of gypsum board on each side
B4 with
• 140 mm concrete block
B4a 2h 2h 47
• 12.7 mm Type X gypsum board or 15.9 mm Type X
gypsum board(7)
B4 with
B4b • 140 mm concrete block 1.5 h 1.5 h 42
• 12.7 mm regular gypsum board(7)(9)
Column 1 2 3 4 5 6
Page 28 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Fire-Resistance Rating(2)(3)(4) Typical Sound
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing
Loadbearing (STC)
B4 with
B4c • 190 mm concrete block 3h 3h 50
• 15.9 mm Type X gypsum board(7)
B4 with
B4d • 190 mm concrete block 2.5 h 2.5 h 49
• 12.7 mm Type X gypsum board(7)
B4 with
B4e • 190 mm concrete block 2h 2h 45
• 12.7 mm regular gypsum board(7)(9)
• 190 mm concrete block
• 38 mm x 38 mm horizontal or vertical wood
B5 strapping on one side spaced at 610 mm o.c.
• with or without absorptive material
• 1 layer of gypsum board on each side
B5 with
B5a 3h 3h 54
• 15.9 mm Type X gypsum board(7)
B5 with
B5b 2.5 h 2.5 h 53
• 12.7 mm Type X gypsum board(7)
• Hollow Concrete B5 with
B5c 2h 2h 51
Block (Normal • 12.7 mm regular gypsum board(7)(9)
Weight Aggregate) • 140 mm or 190 mm concrete block
• 38 mm x 38 mm horizontal or vertical wood
strapping on each side spaced at 610 mm o.c.
B6
• absorptive material filling strapping space on each
side(6)
• 1 layer of gypsum board on each side
B6 with
• 140 mm concrete block
B6a • 12.7 mm Type X gypsum board or 15.9 mm Type X 2h 2h 57
gypsum board(7)
•
B6 with
B6b • 140 mm concrete block 1.5 h 1.5 h 56
• 12.7 mm regular gypsum board(7)(9)
B6 with
B6c • 190 mm concrete block 3h 3h 60
• 15.9 mm Type X gypsum board(7)
B6 with
B6d • 190 mm concrete block 2.5 h 2.5 h 59
• 12.7 mm Type X gypsum board(7)
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing
Loadbearing (STC)
B6 with
B6e • 190 mm concrete block 2h 2h 57
• 12.7 mm regular gypsum board(7)(9)
• 190 mm concrete block
• 65 mm steel studs each side spaced at 610 mm o.c.
B7
• absorptive material filling stud space on each side(6)
• 1 layer of gypsum board on each side
B7 with
B7a 3h 3h 71
• 15.9 mm Type X gypsum board(7)
B7 with
B7b 2.5 h 2.5 h 70
• 12.7 mm Type X gypsum board(7)
B7 with
B7c 2h 2h 69
• 12.7 mm regular gypsum board(7)(9)
• 190 mm concrete block
• 38 mm x 64 mm wood studs on each side spaced
B8 at 610 mm o.c.
• absorptive material filling stud space on each side(6)
• Hollow Concrete • 1 layer of gypsum board on each side
Block (Normal
Weight Aggregate) B8 with
B8a 3h 3h 71
• 15.9 mm Type X gypsum board(7)
B8 with
B8b 2.5 h 2.5 h 70
• 12.7 mm Type X gypsum board(7)
B8 with
B8c • 12.7 mm regular gypsum board(7)(9) 2h 2h 69
•
• 190 mm concrete block
• 50 mm metal Z-bars on each side spaced at
610 mm o.c. (or 38 mm x 38 mm horizontal or
vertical wood strapping plus resilient metal
B9
channels)
• absorptive material filling Z-bar space on each
side(6)
• 1 layer of gypsum board on each side
B9 with
B9a 3h 3h 65
• 15.9 mm Type X gypsum board(7)
B9 with
B9b 2.5 h 2.5 h 64
• 12.7 mm Type X gypsum board(7)
B9 with
B9c 2h 2h 63
• 12.7 mm regular gypsum board(7)(9)
Column 1 2 3 4 5 6
Page 30 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 1 (Cont’d)
Fire and Sound Resistance of Walls(1)
Typical Sound
Fire-Resistance Rating(2)(3)(4)
Wall Transmission
Type of Wall Description
Number Non- Class(2)(4)(5)
Loadbearing
Loadbearing (STC)
• 190 mm concrete block
• resilient metal channels on one side spaced at
610 mm o.c.
B10
• absorptive material filling resilient metal channel
space(6)
• 2 layers of gypsum board on one side only
B10 with
B10a 3h 3h 56
• 15.9 mm Type X gypsum board(7)
B10 with
B10b 2.5 h 2.5 h 55
• 12.7 mm Type X gypsum board(7)
B10 with
B10c 2h 2h 54
• 12.7 mm regular gypsum board(7)
Column 1 2 3 4 5 6
Notes to Table 1:
(1) Reserved.
(2) Fire-resistance ratings and STC ratings of wood-frame construction were evaluated only for assemblies with solid-sawn 38 mm ×
89 mm lumber. However, the fire-resistance ratings and STC ratings provided for 38 mm × 89 mm wood-frame assemblies may be
applied to wood-frame assemblies with solid-sawn 38 mm × 140 mm lumber; in some cases the ratings may be conservative.
Where 38 mm × 140 mm framing is used and absorptive material is called for, the absorptive material must be 140 mm thick. (See
1.2.1.(2) in MMAH Supplementary Standard SB-2 for the significance of fire-resistance ratings).
The STC ratings may also be applied to fingerjoined lumber. The fire-resistance ratings are applicable to wall assemblies using
fingerjoined lumber that has been manufactured with a heat-resistant adhesive (HRA) in accordance with NLGA special product
standard SPS-1-2017 “Fingerjoined Structural Lumber”, or SPS-3-2017, “Fingerjoined ‘Vertical Stud Use Only’ Lumber”. (See also
Appendix Note A-9.23.10.4.(1) under Division B in Appendix A of the Building Code).
(3) For all fire-resistance ratings, the given spacing for framing is a maximum value.
(4) Sound ratings listed are based on the most reliable laboratory test data available for specimens conforming to installation details
required by CSA A82.31-M1980, “Gypsum Board Application”. Results of specific tests may differ slightly because of
measurement precision and minor variations in construction details. These results should only be used where the actual
construction details, including spacing of fasteners and supporting framing, correspond exactly to the details of the test specimens
on which the ratings are based. For wood- and steel-framed assemblies, if the fasteners are spaced less than 300 mm o.c.,
subtract 1 from the sound transmission class value; if the fasteners are spaced less than 200 mm o.c., subtract 2 from the sound
transmission class value. Narrower fastener spacing is not detrimental to the fire-resistance rating. Assemblies with sound
transmission class ratings of 50 or more require methods to minimize airborne sound transmission at electrical boxes and other
openings, and at the junction of intersecting walls and floors, except intersection of walls constructed of concrete or solid masonry
units where the masonry joints at the intersection are mortared.
(5) Sound ratings are only valid where there are no discernible cracks or voids in the visible surfaces. For concrete block walls,
surfaces must be sealed by at least 2 coats of paint or other surface finish described in Section 9.29. of Division B of the Building
Code to prevent sound leakage.
(6) Sound absorptive material includes fibre processed from rock, slag, glass or cellulose fibre. It must fill at least 90% of the cavity
thickness for the wall to provide the listed STC value. The absorptive material should not overfill the cavity to the point of producing
significant outward pressure on the finishes; such an assembly will not achieve the STC rating. Where the absorptive material used
with steel stud assemblies is in batt form, “steel stud batts”, which are wide enough to fill the cavity from the web of one stud to the
web of the adjacent studs, must be used.
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
(7) The complete descriptions of indicated finishes are as follows:
• 12.7 mm regular gypsum board — 12.7 mm regular gypsum board conforming to Article 9.29.5.2. of Division B of the Building
Code.
• 12.7 mm Type X gypsum board — 12.7 mm special fire-resistant Type X gypsum board conforming to Article 9.29.5.2. of
Division B of the Building Code.
• 15.9 mm Type X gypsum board — 15.9 mm special fire-resistant Type X gypsum board conforming to Article 9.29.5.2. of
Division B of the Building Code.
• Except for exterior walls (see Note 15), the outer layer of finish on both sides of the wall must have its joints taped and
finished.
• Except as otherwise required for fastener spacing (see Table Notes (14), (16) and (22)), fastener type, spacing and
penetration depth for the attachment of gypsum board must conform to Subsection 9.29.5. of Division B of the Building Code
and fasteners must consist of
• nails or screws when attaching gypsum board to wood studs or wood strapping, and
• screws when attaching gypsum board to cold-formed steel studs or resilient metal channels.
(8) Absorptive material required for the higher fire-resistance rating shall be mineral fibre processed from rock or slag with a mass pr
unit of wall surface of at least 4.8 kg/m² for 150 mm thickness, 2.8 kg/m² for 89 mm thickness and 2.0 kg/m² for 65 mm thickness
and shall completely fill the wall cavity. For assemblies with double wood studs on separate plates, absorptive material is required
in the stud cavities on both sides.
(9) Regular gypsum board used in single layer assemblies must be installed so all edges are supported.
(10) The fire-resistance rating values are achieved as follows:
• for a single row of studs, by installing blocking at a spacing of not more than 1 524 mm o.c. as shown in Case A of Figure 5,
or
• for two rows of studs on separate plates, by installing blocking in both rows at a spacing of not more than 1 524 mm o.c. as
shown in Case B of Figure 5.
(11) The mineral fibre insulation processed from rock or slag shall have a mass per unit area of wall surface of not less than 4.48 kg/m 2
for 140 mm thickness and 2.85 kg/m2 for 89 mm thickness and shall completely fill the wall cavity.
(12) The dry-blown cellulose fibre insulation shall have a mass per unit area of wall surface of not less than 6.80 kg/m2 for 140 mm
thickness and 4.32 kg/m2 for 89 mm thickness and shall completely fill the wall cavity.
(13) Where bracing material, such as diagonal lumber or plywood, OSB, gypsum board or fibreboard sheathing is installed on the inner
face of one row of studs in double stud assemblies, the STC rating will be reduced by 3 for any assemblies containing absorptive
material in both rows of studs or in the row of studs opposite to that to which the bracing material is attached. Attaching such layers
on both inner faces of the studs may drastically reduce the STC value but enough data to permit assignment of STC ratings for this
situation is not available. The fire-resistance rating is not affected by the inclusion of such bracing.
(14) For the attachment of the gypsum board, fasteners shall be spaced at not more than 200 mm (nominal) o.c. along the framing
members and resilient metal channels in both the base and face layers.
(15) For exterior walls, the finish joints must be taped and finished for the outer layer of the interior side only.
(16) For the attachment of the gypsum board on the interior side of exterior wall assemblies, fasteners shall be spaced at not more than
200 mm (nominal) o.c. along the framing members. All joints shall be backed with lumber having the same dimensions as the
framing members as shown in Figures 6 and 7. For EW1e, EW2j and EW3k walls, blocking shall be installed at a spacing of not
more than 1 524 mm o.c. as shown in Case A of Figure 5 where joints are backed at a spacing of more than 1 524 mm o.c. along
the height of the wall.
(17) The exterior OSB or plywood sheathing shall be not less than 11.1 mm thick and shall be installed with a gap of not less than 2 mm
between sheets. Fastener types and spacing shall conform to Table 9.23.3.5.-A of Division B of the Building Code. All joints shall
be backed with lumber having the same dimensions as the framing members as shown in Figures 6 and 7.
(18) The exterior gypsum sheathing shall be Type X gypsum sheathing not less than 15.9 mm thick. Fasteners shall be spaced at not
more than 200 mm (nominal) o.c. along the framing members.
(19) Any cladding allowed under Part 9 is permitted. The cladding can include foamed plastic and other insulations outboard of the
sheathing, where permitted by spatial separation requirements in Subsection 9.10.14. or 9.10.15. of Division B of the Building
Code. Where OSB or plywood sheathing acts as the cladding, no additional outboard cladding is required, but is permitted.
Page 32 • SB-3
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2024MMAH Supplementary Standard SB-3
(20) Includes any exterior wall sheathing listed in Table 9.23.17.2.-A of Division B of the Building Code and masonry veneer cladding
conforming to Section 9.20. of Division B of the Building Code. Foamed plastic sheathing is permitted in EW1e, EW2j and EW3k
walls without the use of other sheathing, provided it is directly attached to the framing.
(21) The glass fibre insulation shall have a mass per unit area of wall surface of not less than 1.30 kg/m 2 for 140 mm thickness and
1.0 kg/m2 for 89 mm thickness and shall completely fill the wall cavity.
(22) For the attachment of the gypsum board on the interior side of exterior wall assemblies, fasteners shall be spaced at not more than
150 mm (nominal) o.c. along the edges and 200 mm (nominal) o.c. along the intermediate supports. All joints shall be backed with
lumber having the same dimensions as the framing members as shown in Figures 6 and 7.
(23) The exterior gypsum sheathing shall be not less than 12.7 mm thick. Fasteners shall be spaced at not more than 200 mm
(nominal) o.c. along the framing members.
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Section 2 Fire and Sound Resistance of Floors,
Ceilings and Roofs
Table 2
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F1 • concrete floors
• 90 mm reinforced concrete with 20 mm minimum
F1a 1h 47 23
cover over reinforcing steel
• 130 mm reinforced concrete with 25 mm
F1b minimum 2h 52 27
Concrete Slabs cover over reinforcing steel
• pre-stressed hollow core slab 200 mm deep with
F1c 1h 50 28
25 mm minimum cover over reinforcing steel
• 150 mm composite slab on 75 mm steel deck
F1d — 51 21
with 152 x 152 x MW3.8 x MW3.8 wire mesh
• 150 mm composite slab on 75 mm steel deck
with 152 x 152 x MW3.8 x MW3.8 wire mesh
• resilient metal channels spaced 406 mm or
F1e 1.5 h 57 36
610 mm o.c.
• 2 layers of 12.7 mm Type X gypsum board or
2 layers of 15.9 mm Type X gypsum board
F2 • open web steel joists with concrete floor
Open Web Steel Joists
• 50 mm thick concrete deck
• on open web steel joists spaced 406 mm o.c.
• steel furring channels spaced not more than
F2a 45 min 53 27
610 mm o.c. wired to underside of joists
• 1 layer of 15.9 mm Type X gypsum board on
ceiling side
Column 1 2 3 4 5 6
Page 34 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Assembly Fire- Resistance Transmission Insulation
Type of Assembly Description(2)(3)(4)
Number Rating(5)(6)(7)(8) Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
(STC) (IIC)
Floors and Ceilings
• 65 mm regular concrete minimum 155 kg/m2
• on composite steel joists spaced 1250 mm o.c.
• steel furring channels spaced not more than
Open Web Steel Joists F2b 1.5 h 53 28
610 mm o.c. wired to underside of joists
• 1 layer of 12.7 mm Type X gypsum board or
15.9 mm Type X gypsum board on ceiling side
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove
lumber
F3(14) • on wood joists or wood I-joists spaced not
more than 610 mm o.c.
• with or without absorptive material in cavity
• 1 layer of gypsum board on ceiling side
F3 with
F3a • no absorptive material in cavity — 29 27
• 15.9 mm Type X gypsum board
F3 with
F3b • absorptive material in cavity — 31 30
Wood Floor Joists(13) • 15.9 mm Type X gypsum board
F3 with
F3c • no absorptive material in cavity — 27 26
• 12.7 mm Type X gypsum board
F3 with
F3d • absorptive material in cavity — 29 29
• 12.7 mm Type X gypsum board
F3 with
F3e • no absorptive material in cavity — 27 25
• 12.7 mm regular gypsum board
F3 with
F3f • absorptive material in cavity — 29 28
• 12.7 mm regular gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Assembly Fire- Resistance Transmission Insulation
Type of Assembly Description(2)(3)(4)
Number Rating(5)(6)(7)(8) Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
(STC) (IIC)
Floors and Ceilings
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove
lumber
F4(14) • on wood joists or wood I-joists spaced not
more than 610 mm o.c.
• with or without absorptive material in cavity
• 2 layers of gypsum board on ceiling side
F4 with
• wood joists or wood I-joists spaced 406 mm
F4a 1h 33 31
o.c.
• no absorptive material in cavity
• 15.9
F4 withmm Type X gypsum board
• wood joists or wood I-joists spaced 610 mm
F4b 1h 34 31
o.c.
• no absorptive material in cavity
• 15.9
F4 withmm Type X gypsum board
• wood joists or wood I-joists spaced 406 mm 45 min
F4c 35 34
o.c. [1 h](15)
Wood Floor Joists(13) • absorptive material in cavity
• 15.9
F4 withmm Type X gypsum board
• wood joists or wood I-joists spaced 610 mm
F4d 45 min 38 34
o.c.
• absorptive material in cavity
• 15.9
F4 withmm Type X gypsum board
• wood joists or wood I-joists spaced 406 mm
F4e 1h 32 30
o.c.
• no absorptive material in cavity
• 12.7
F4 withmm Type X gypsum board
• wood joists or wood I-joists spaced 610 mm
F4f 45 min 33 30
o.c.
• no absorptive material in cavity
• 12.7
F4 withmm Type X gypsum board
• wood joists or wood I-joists spaced 406 mm
F4g 45 min 34 33
o.c.
• absorptive material in cavity
• 12.7
F4 withmm Type X gypsum board
• wood joists or wood I-joists spaced 610 mm
F4h — 35 33
o.c.
• absorptive material in cavity
Column 1 2 • 12.7 mm Type X gypsum 3 board 4 5 6
Page 36 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F4 with
F4i • no absorptive material in cavity — 31 30
• 12.7 mm regular gypsum board
F4 with
F4j • absorptive material in cavity — 33 33
• 12.7 mm regular gypsum board
• subfloor of 15.5 mm plywood, OSB or waferboard,
or 17 mm tongue and groove lumber
• on wood joists or wood I-joists spaced not more
than 610 mm o.c.
F5(13)
• with or without absorptive material in cavity
• steel furring channels spaced 406 mm or
610 mm o.c.
• 1 layer of gypsum board on ceiling side
F5 with
• no absorptive material in cavity
F5a 30 min 35 37
• steel furring channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
Wood Floor Joists(13) F5 with
• no absorptive material in cavity
F5b 30 min 37 30
• steel furring channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F5 with
• absorptive material in cavity 30 min
F5c 38 30
• steel furring channels spaced 406 mm o.c. [45 min](16)
• 15.9 mm Type X gypsum board
F5 with
• absorptive material in cavity
F5d 30 min 40 33
• steel furring channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F5 with
• no absorptive material in cavity
F5e 30 min 33 26
• steel furring channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F5 with
• no absorptive material in cavity
F5f 30 min 35 29
• steel furring channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F5 with
• absorptive material in cavity 30 min
F5g 36 29
• steel furring channels spaced 406 mm o.c. [45 min](16)
• 12.7 mm Type X gypsum board
F5 with
• absorptive material in cavity
F5h 30 min 38 32
• steel furring channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F5 with
• no absorptive material in cavity
F5i < 30 min 33 25
• steel furring channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F5 with
• no absorptive material in cavity
F5j < 30 min 35 28
• steel furring channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F5 with
• absorptive material in cavity
F5k < 30 min 36 28
• steel furring channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
Wood Floor Joists(13) F5 with
• absorptive material in cavity
F5l < 30 min 38 33
• steel furring channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood joists or wood I-joists spaced not more
than 610 mm o.c.
F6(14)
• with or without absorptive material in cavity
• steel furring channels spaced 406 mm or
610 mm o.c.
• 2 layers of gypsum board on ceiling side
F6 with
• no absorptive material in cavity
F6a(17) 1h 39 32
• steel furring channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F6 with
• no absorptive material in cavity
F6b(17) 1h 41 32
• steel furring channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 38 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F6 with
• absorptive material in cavity
F6c(17) 1h 42 35
• steel furring channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F6 with
• absorptive material in cavity
F6d(17) 1h 44 37
• steel furring channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F6 with
• no absorptive material in cavity
F6e(17) 1h 38 30
• steel furring channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F6 with
• no absorptive material in cavity
F6f(17) 1h 40 33
• steel furring channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F6 with
• absorptive material in cavity
F6g(17) 1h 41 33
• steel furring channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
Wood Floor Joists(13)
F6 with
• absorptive material in cavity 45 min
F6h(17) 43 36
• steel furring channels spaced 610 mm o.c. [1 h](18)
• 12.7 mm Type X gypsum board
F6 with
• no absorptive material in cavity
F6i — 37 30
• steel furring channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F6 with
• no absorptive material in cavity
F6j — 39 33
• steel furring channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F6 with
• absorptive material in cavity
F6k — 40 33
• steel furring channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F6 with
• absorptive material in cavity
F6l — 42 36
• steel furring channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood joists or wood I-joists spaced not more
than 610 mm o.c.
• with or without absorptive material in cavity
• 1 layer of gypsum board attached directly to joists
F7(14)
on ceiling side
• resilient metal channels spaced 406 mm or
610 mm o.c. attached to joists through gypsum
board
• 1 layer of gypsum board attached to resilient
channels
F7 with
• no absorptive material in cavity
F7a(17) • 15.9 mm Type X gypsum board 1h 35 27
• resilient metal channels
• 15.9 mm Type X gypsum board
F7 with
• absorptive material in cavity
F7b(17) • 15.9 mm Type X gypsum board 1h 37 30
• resilient metal channels
Wood Floor Joists(13) • 15.9 mm Type X gypsum board
F7 with
• no absorptive material in cavity
F7c(17) • 12.7 mm Type X gypsum board 1h 35 27
• resilient metal channels
• 12.7 mm Type X gypsum board
F7 with
• absorptive material in cavity
F7d(17) • 12.7 mm Type X gypsum board 1h 37 30
• resilient metal channels
• 12.7 mm Type X gypsum board
F7 with
• no absorptive material in cavity
F7e • 12.7 mm regular gypsum board — 32 26
• resilient metal channels
• 12.7 mm regular gypsum board
F7 with
• absorptive material in cavity
F7f • 12.7 mm regular gypsum board — 35 28
• resilient metal channels
• 12.7 mm regular gypsum board
Column 1 2 3 4 5 6
Page 40 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood joists or wood I-joists spaced not more
than 610 mm o.c.
F8(14)
• with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 1 layer of gypsum board on ceiling side
F8 with
• no absorptive material in cavity
F8a 30 min 41 33
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F8 with
• no absorptive material in cavity
F8b 30 min 43 36
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F8 with
Wood Floor Joists(13) • absorptive material in cavity 30 min
F8c 48 41
• resilient metal channels spaced 406 mm o.c. [45 min](16)
• 15.9 mm Type X gypsum board
F8 with
• absorptive material in cavity
F8d 30 min 50 44
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F8 with
• no absorptive material in cavity
F8e 30 min 39 32
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F8 with
• no absorptive material in cavity
F8f 30 min 41 35
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F8 with
• absorptive material in cavity 30 min
F8g 46 40
• resilient metal channels spaced 406 mm o.c. [45 min](16)
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F8 with
• absorptive material in cavity
F8h 30 min 48 43
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F8 with
• no absorptive material in cavity
F8i < 30 min 41 31
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F8 with
• no absorptive material in cavity
F8j < 30 min 41 34
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F8 with
• absorptive material in cavity
F8k < 30 min 46 39
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F8 with
• absorptive material in cavity
Wood Floor Joists(13) F8l < 30 min 48 42
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood joists or wood I-joists spaced not more
than 610 mm o.c.
F9(14)
• with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 2 layers of gypsum board on ceiling side
F9 with
• no absorptive material in cavity
F9a(17) 1h 45 38
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F9 with
• no absorptive material in cavity
F9b(17) 1h 47 40
• resilient metal channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 42 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F9 with
• absorptive material in cavity 1h 52
F9c(17) 46
• resilient metal channels spaced 406 mm o.c. [1.5 h](19) [54](19)
• 15.9 mm Type X gypsum board
F9 with
• absorptive material in cavity 1h 54
F9d(17) 48
• resilient metal channels spaced 610 mm o.c. [1.5 h](19) [56](19)
• 15.9 mm Type X gypsum board
F9 with
• no absorptive material in cavity
F9e(17) 1h 44 36
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F9 with
• no absorptive material in cavity
F9f(17) 1h 46 39
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F9 with
• absorptive material in cavity 1h 51
F9g(17) 44
• resilient metal channels spaced 406 mm o.c. [1.5 h](19) [53](19)
• 12.7 mm Type X gypsum board
Wood Floor Joists(12)
F9 with
• absorptive material in cavity 45 min
F9h(17) 53 47
• resilient metal channels spaced 610 mm o.c. [1 h](18)
• 12.7 mm Type X gypsum board
F9 with
• no absorptive material in cavity
F9i — 43 36
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F9 with
• no absorptive material in cavity
F9j — 45 39
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F9 with
• absorptive material in cavity
F9k — 50 44
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F9 with
• absorptive material in cavity
F9l — 52 47
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
• one subfloor layer of 11 mm sanded plywood, or
OSB or waferboard
• one subfloor layer of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood joists or wood I-joists spaced not more
F10(14)
than 610 mm o.c.
• with or without absorptive material in cavity
• resilient metal channels spaced 305 mm, 406 mm
or 610 mm o.c.
• 1 layer of gypsum board on ceiling side
F10 with
• no absorptive material in cavity
F10a 30 min 44 34
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F10 with
• no absorptive material in cavity
F10b 30 min 46 37
• resilient metal channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F10 with
Wood Floor Joists(13) • absorptive material in cavity 30 min
F10c 51 42
• resilient metal channels spaced 406 mm o.c. [45 min](18)
• 15.9 mm Type X gypsum board
F10 with
• absorptive material in cavity 30 min
F10d 53 45
• resilient metal channels spaced 610 mm o.c. [45 min](16)
• 15.9 mm Type X gypsum board
F10 with
• wood joists spaced 406 mm o.c.
F10e • absorptive material in cavity 1 h(20) 53(20) 44
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F10 with
• wood I-joists spaced 406 mm o.c.
F10f(21) • absorptive material in cavity 1 h(20) 52(20) 43
• resilient metal channels spaced 305 mm o.c.
• 15.9 mm Type X gypsum board
F10 with
• no absorptive material in cavity
F10g 30 min 42 33
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 44 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Assembly Fire- Resistance Transmission Insulation
Type of Assembly Description(2)(3)(4)
Number Rating(5)(6)(7)(8) Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
(STC) (IIC)
Floors and Ceilings
F10 with
• no absorptive material in cavity
F10h 30 min 44 36
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F10 with
• absorptive material in cavity 30 min
F10i 49 41
• resilient metal channels spaced 406 mm o.c. [45 min](18)
• 12.7 mm Type X gypsum board
F10 with
• absorptive material in cavity 30 min
F10j 51 44
• resilient metal channels spaced 610 mm o.c. [45 min](16)
• 12.7 mm Type X gypsum board
F10 with
• no absorptive material in cavity
F10k — 42 33
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F10 with
• no absorptive material in cavity
F10l — 44 35
• resilient metal channels spaced 610 mm o.c.
Wood Floor Joists(13) • 12.7 mm regular gypsum board
F10 with
• absorptive material in cavity
F10m — 49 41
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F10 with
• absorptive material in cavity
F10n — 51 43
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• one subfloor layer of 11 mm sanded plywood,
or OSB or waferboard
• one subfloor layer of 15.5 mm plywood, OSB
or waferboard, or 17 mm tongue and groove
lumber
F11(14) • on wood joists or wood I-joists spaced not
more than 610 mm o.c.
• with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 2 layers of gypsum board on ceiling side
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F11 with
• no absorptive material in cavity
F11a(17) 1h 48 39
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F11 with
• no absorptive material in cavity
F11b(17) 1h 50 42
• resilient metal channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F11 with
• absorptive material in cavity 1h 55
F11c(17) 47
• resilient metal channels spaced 406 mm o.c. [1.5 h](19) [56](19)
• 15.9 mm Type X gypsum board
F11 with
• absorptive material in cavity 1h 57
F11d(17) 50
• resilient metal channels spaced 610 mm o.c. [1.5 h](19) [58](19)
• 15.9 mm Type X gypsum board
F11 with
• wood joists spaced 406 mm o.c.
F11e(17) • absorptive material in cavity 1.5 h(22) 56(22) 47
Wood Floor Joists(13)
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F11 with
• wood I-joists spaced 406 mm o.c.
F11f(21) • absorptive material in cavity 1.5 h(22) 56(22) 46
• resilient metal channels spaced 305 mm o.c.
• 15.9 mm Type X gypsum board
F11 with
• no absorptive material in cavity
F11g(17) 1h 47 38
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F11 with
• no absorptive material in cavity
F11h(17) 1h 49 40
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F11 with
• absorptive material in cavity 1h 54
F11i(17) 46
• resilient metal channels spaced 406 mm o.c. [1.5 h](19) [55](19)
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 46 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F11 with
• absorptive material in cavity 45 min
F11j(17) 56 48
• resilient metal channels spaced 610 mm o.c. [1 h](18)
• 12.7 mm Type X gypsum board
F11 with
• no absorptive material in cavity
F11k — 46 37
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F11 with
• no absorptive material in cavity
F11l — 48 40
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F11 with
• absorptive material in cavity
F11m — 53 45
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F11 with
• absorptive material in cavity
F11n — 55 48
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
Wood Floor Joists(13)
• 25 mm gypsum-concrete topping (at least
44 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
F12(14)
• on wood joists or wood I-joists spaced not more
than 610 mm o.c.
• with or without absorptive material in cavity
• 1 layer of gypsum board on ceiling side
F12 with
F12a • no absorptive material in cavity — 41 13
• 15.9 mm Type X gypsum board
F12 with
F12b • absorptive material in cavity — 43 16
• 15.9 mm Type X gypsum board
F12 with
F12c • no absorptive material in cavity — 39 12
• 12.7 mm Type X gypsum board
F12 with
F12d • absorptive material in cavity — 41 15
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F12 with
F12e • no absorptive material in cavity — 39 12
• 12.7 mm regular gypsum board
F12 with
F12f • absorptive material in cavity —
& 41 15
• 12.7 mm regular gypsum board
• 25 mm gypsum-concrete topping (at least
44 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
F13(14)
• on wood joists or wood I-joists spaced not more
than 610 mm o.c.
• with or without absorptive material in cavity
• 2 layers of gypsum board on ceiling side
F13 with
• wood joists or wood I-joists spaced 406 mm o.c.
F13a 1h 43 16
Wood Floor Joists(13) • no absorptive material in cavity
• 15.9 mm Type X gypsum board
F13 with
• wood joists or wood I-joists spaced 610 mm o.c.
F13b 1h 45 16
• no absorptive material in cavity
• 15.9 mm Type X gypsum board
F13 with
• wood joists or wood I-joists spaced 406 mm o.c. 45 min
F13c 45 19
• absorptive material in cavity [1 h](15)
• 15.9 mm Type X gypsum board
F13 with
• wood joists or wood I-joists spaced 610 mm o.c.
F13d 45 min 47 19
• absorptive material in cavity
• 15.9 mm Type X gypsum board
F13 with
• wood joists or wood I-joists spaced 406 mm o.c.
F13e 1h 42 15
• no absorptive material in cavity
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 48 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F13 with
• wood joists or wood I-joists spaced 610 mm o.c.
F13f 45 min 44 15
• no absorptive material in cavity
• 12.7 mm Type X gypsum board
F13 with
• wood joists or wood I-joists spaced 406 mm o.c.
F13g 45 min 44 18
• absorptive material in cavity
• 12.7 mm Type X gypsum board
F13 with
• wood joists or wood I-joists spaced 610 mm o.c.
F13h — 46 18
• absorptive material in cavity
• 12.7 mm Type X gypsum board
F13 with
F13i • no absorptive material in cavity — 41 14
• 12.7 mm regular gypsum board
F13 with
F13j • absorptive material in cavity — 45 14
• 12.7 mm regular gypsum board
• 25 mm gypsum-concrete topping (at least
Wood Floor Joists(13) 44 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood joists or wood I-joists spaced not more
F14(14)
than 610 mm o.c.
• with or without absorptive material in cavity
• resilient metal channels spaced 305 mm, 406 mm
or 610 mm o.c.
• 1 layer of gypsum board on ceiling side
F14 with
• no absorptive material in cavity
F14a — 53 22
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F14 with
• no absorptive material in cavity
F14b — 55 22
• resilient metal channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F14 with
• absorptive material in cavity 30 min
F14c 60 30
• resilient metal channels spaced 406 mm o.c. [45 min](18)
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F14 with
• absorptive material in cavity
F14d — 62 30
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F14 with
• wood joists spaced 406 mm o.c.
F14e • absorptive material in cavity 1 h(20) 60(20) 31
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F14 with
• wood I-joists spaced 406 mm o.c.
F14f(21) • absorptive material in cavity 1 h(20) 61(20) 31
• resilient metal channels spaced 305 mm o.c.
• 15.9 mm Type X gypsum board
F14 with
• no absorptive material in cavity
F14g — 51 21
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F14 with
Wood Floor Joists(13)
• no absorptive material in cavity
F14h — 53 21
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F14 with
• absorptive material in cavity
F14i — 58 29
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F14 with
• absorptive material in cavity
F14j — 60 29
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F14 with
• no absorptive material in cavity
F14k — 51 21
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F14 with
• no absorptive material in cavity
F14l — 53 21
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
Column 1 2 3 4 5 6
Page 50 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F14 with
• absorptive material in cavity
F14m — 58 29
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F14 with
• absorptive material in cavity
F14n — 60 29
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• 25 mm gypsum-concrete topping (at least
44 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood joists or wood I-joists spaced not more
F15(14)
than 610 mm o.c.
• with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 2 layers of gypsum board on ceiling side
F15 with
Wood Floor Joists(13) • no absorptive material in cavity
F15a(17) 1 h(23) 57 25
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F15 with
• no absorptive material in cavity
F15b(17) 1h 59 25
• resilient metal channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F15 with
• absorptive material in cavity 1h 64
F15c(17) 33
• resilient metal channels spaced 406 mm o.c. [1.5 h](19) [65](19)
• 15.9 mm Type X gypsum board
F15 with
• absorptive material in cavity 1h 66
F15d(17) 33
• resilient metal channels spaced 610 mm o.c. [1.5 h](19) [67](19)
• 15.9 mm Type X gypsum board
F15 with
• wood joists spaced 406 mm o.c.
F15e(17) • absorptive material in cavity 1.5 h(22) 65(22) 33
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F15 with
• wood I-joists spaced 406 mm o.c.
F15f(21) • absorptive material in cavity 1.5 h(22) 64(22) 33
• resilient metal channels spaced 305 mm o.c.
• 15.9 mm Type X gypsum board
F15 with
• no absorptive material in cavity
F15g(17) 1h 56 24
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F15 with
• no absorptive material in cavity
F15h(17) 1h 58 24
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F15 with
• absorptive material in cavity 1h 63
F15i(17) 32
• resilient metal channels spaced 406 mm o.c. [1.5 h](19) [64](19)
• 12.7 mm Type X gypsum board
F15 with
Wood Floor Joists(13) • absorptive material in cavity 45 min
F15j(17) 65 32
• resilient metal channels spaced 610 mm o.c. [1 h](18)
• 12.7 mm Type X gypsum board
F15 with
• no absorptive material in cavity
F15k — 55 23
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F15 with
• no absorptive material in cavity
F15l — 57 23
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F15 with
• absorptive material in cavity
F15m — 62 31
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F15 with
• absorptive material in cavity
F15n — 64 31
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
Column 1 2 3 4 5 6
Page 52 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
• 38 mm concrete topping (at least 70 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
F16(14) • on wood joists or wood I-joists spaced not more
than 610 mm o.c.
• with or without absorptive material in cavity
• 1 layer of gypsum board on ceiling side
F16 with
F16a • no absorptive material in cavity — 44 22
• 15.9 mm Type X gypsum board
F16 with
F16b • absorptive material in cavity — 46 25
• 15.9 mm Type X gypsum board
F16 with
F16c • no absorptive material in cavity — 43 21
• 12.7 mm Type X gypsum board
Wood Floor Joists(13)
F16 with
F16d • absorptive material in cavity — 45 24
• 12.7 mm Type X gypsum board
F16 with
F16e • no absorptive material in cavity — 42 21
• 12.7 mm regular gypsum board
F16 with
F16f • absorptive material in cavity — 44 24
• 12.7 mm regular gypsum board
• 38 mm concrete topping (at least 70 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
F17(14) • on wood joists or wood I-joists spaced not more
than 610 mm o.c.
• with or without absorptive material in cavity
• 2 layers of gypsum board on ceiling side
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F17 with
• wood joists or wood I-joists spaced 406 mm o.c.
F17a 1h 48 24
• no absorptive material in cavity
• 15.9 mm Type X gypsum board
F17 with
• wood joists or wood I-joists spaced 610 mm o.c.
F17b 1h 51 24
• no absorptive material in cavity
• 15.9 mm Type X gypsum board
F17 with
• wood joists or wood I-joists spaced 406 mm o.c. 45 min
F17c 48 27
• absorptive material in cavity [1 h](15)
• 15.9 mm Type X gypsum board
F17 with
• wood joists or wood I-joists spaced 610 mm o.c.
F17d 45 min 51 27
• absorptive material in cavity
• 15.9 mm Type X gypsum board
F17 with
• wood joists or wood I-joists spaced 406 mm o.c.
F17e 1h 47 23
• no absorptive material in cavity
Wood Floor Joists(13) • 12.7 mm Type X gypsum board
F17 with
• wood joists or wood I-joists spaced 610 mm o.c.
F17f 45 min 48 23
• no absorptive material in cavity
• 12.7 mm Type X gypsum board
F17 with
• wood joists or wood I-joists spaced 406 mm o.c.
F17g 45 min 49 26
• absorptive material in cavity
• 12.7 mm Type X gypsum board
F17 with
• wood joists or wood I-joists spaced 610 mm o.c.
F17h — 50 26
• absorptive material in cavity
• 12.7 mm Type X gypsum board
F17 with
F17i • no absorptive material in cavity — 47 23
• 12.7 mm regular gypsum board
F17 with
F17j • absorptive material in cavity — 49 26
• 12.7 mm regular gypsum board
Column 1 2 3 4 5 6
Page 54 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
• 38 mm concrete topping (at least 70 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood joists or wood I-joists spaced not more
F18(14) than 610 mm o.c.
• with or without absorptive material in cavity
• steel furring channels spaced 406 mm or
610 mm o.c.
• 1 layer of gypsum board on ceiling side
F18 with
• no absorptive material in cavity
F18a — 50 25
• steel furring channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F18 with
• no absorptive material in cavity
F18b — 52 25
• steel furring channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F18 with
Wood Floor Joists(13) • absorptive material in cavity
F18c — 53 28
• steel furring channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F18 with
• absorptive material in cavity
F18d — 55 28
• steel furring channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F18 with
• no absorptive material in cavity
F18e — 49 24
• steel furring channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F18 with
• no absorptive material in cavity
F18f — 51 24
• steel furring channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F18 with
• absorptive material in cavity
F18g — 52 27
• steel furring channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F18 with
• absorptive material in cavity
F18h — 54 27
• steel furring channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F18 with
• no absorptive material in cavity
F18i — 48 24
• steel furring channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F18 with
• no absorptive material in cavity
F18j — 50 24
• steel furring channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F18 with
• absorptive material in cavity
F18k — 51 27
• steel furring channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F18 with
• absorptive material in cavity
Wood Floor Joists(13) F18l — 53 27
• steel furring channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• 38 mm concrete topping (at least 70 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood joists or wood I-joists spaced not more
F19(14) than 610 mm o.c.
• with or without absorptive material in cavity
• steel furring channels spaced 406 mm or
610 mm o.c.
• 2 layers of gypsum board on ceiling side
F19 with
• no absorptive material in cavity
F19a(17) 1h 54 27
• steel furring channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F19 with
• no absorptive material in cavity
F19b(17) 1h 56 27
• steel furring channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 56 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F19 with
• absorptive material in cavity
F19c(17) 1h 57 30
• steel furring channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F19 with
• absorptive material in cavity
F19d(17) 1h 59 30
• steel furring channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F19 with
• no absorptive material in cavity
F19e(17) 1h 53 26
• steel furring channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F19 with
• no absorptive material in cavity
F19f(17) 1h 55 26
• steel furring channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F19 with
• absorptive material in cavity
F19g(17) 1h 56 29
• steel furring channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
Wood Floor Joists(13)
F19 with
• absorptive material in cavity
F19h(17) 1h 58 29
• steel furring channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F19 with
• no absorptive material in cavity
F19i — 53 26
• steel furring channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F19 with
• no absorptive material in cavity
F19j — 55 26
• steel furring channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F19 with
• absorptive material in cavity
F19k — 56 29
• steel furring channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F19 with
• absorptive material in cavity
F19l — 58 29
• steel furring channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
• 38 mm concrete topping (at least 70 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood joists or wood I-joists spaced not more
F20(14) than 610 mm o.c.
• with or without absorptive material in cavity
• resilient metal channels spaced 305 mm, 406 mm
or 610 mm o.c.
• 1 layer of gypsum board on ceiling side
F20 with
• no absorptive material in cavity
F20a [45 min](23) 56 31
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F20 with
• no absorptive material in cavity
F20b — 58 31
• resilient metal channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F20 with
• absorptive material in cavity 30 min
F20c 63 39
Wood Floor Joists(13) • resilient metal channels spaced 406 mm o.c. [45 min](18)(23)
• 15.9 mm Type X gypsum board
F20 with
• absorptive material in cavity
F20d — 65 39
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F20 with
• wood joists spaced 406 mm o.c.
F20e • absorptive material in cavity 1 h(20) 64(20) 40
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F20 with
• wood I-joists spaced 406 mm o.c.
F20f(21) • absorptive material in cavity 1 h(20) 65(20) 40
• resilient metal channels spaced 305 mm o.c.
• 15.9 mm Type X gypsum board
F20 with
• no absorptive material in cavity
F20g — 55 30
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 58 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F20 with
• no absorptive material in cavity
F20h — 57 30
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F20 with
• absorptive material in cavity
F20i — 62 38
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F20 with
• absorptive material in cavity
F20j — 64 38
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F20 with
• no absorptive material in cavity
F20k — 54 30
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F20 with
• no absorptive material in cavity
F20l — 56 30
Wood Floor Joists(13) • resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F20 with
• absorptive material in cavity
F20m — 61 38
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F20 with
• absorptive material in cavity
F20n — 63 38
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• 38 mm concrete topping (at least 70 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood joists or wood I-joists spaced not more
F21(14) than 610 mm o.c.
• with or without absorptive material in cavity
• resilient metal channels spaced 305 mm, 406 mm
or 610 mm o.c.
• 2 layers of gypsum board on ceiling side
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F21 with
• no absorptive material in cavity
F21a(17) 1h 60 33
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F21 with
• no absorptive material in cavity
F21b(17) 1h 62 33
• resilient metal channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F21 with
• absorptive material in cavity 1h 67 41
F21c(17)
• resilient metal channels spaced 406 mm o.c. [1.5 h](19) [68](19) [42](19)
• 15.9 mm Type X gypsum board
F21 with
• absorptive material in cavity 1h 69 41
F21d(17)
• resilient metal channels spaced 610 mm o.c. [1.5 h](19) [70](19) [42](19)
• 15.9 mm Type X gypsum board
F21 with
• wood joists spaced 406 mm o.c.
F21e(17) • absorptive material in cavity [1.5 h](22) 68(22) 42
Wood Floor Joists(13)
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F21 with
• wood I-joists spaced 406 mm o.c.
F21f(21) • absorptive material in cavity [1.5 h](22) 68(22) 42
• resilient metal channels spaced 305 mm o.c.
• 15.9 mm Type X gypsum board
F21 with
• no absorptive material in cavity
F21g(17) 1h 59 32
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F21 with
• no absorptive material in cavity
F21h(17) 1h 61 32
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F21 with
• absorptive material in cavity 1h 66
F21i(17) 40
• resilient metal channels spaced 406 mm o.c. [1.5 h](19) [67](19)
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 60 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F21 with
• absorptive material in cavity
F21j(17) 1h 68 40
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F21 with
• no absorptive material in cavity
F21k — 59 32
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F21 with
• no absorptive material in cavity
Wood Floor Joists(13) F21l — 61 32
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F21 with
• absorptive material in cavity
F21m — 66 40
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F21 with
• absorptive material in cavity
F21n — 68 40
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood trusses spaced not more than 610 mm
F22
o.c.
• with or without absorptive material in cavity
• 1 layer of gypsum board on ceiling side
F22 with
F22a • no absorptive material in cavity — 29 27
• 15.9 mm Type X gypsum board
Wood Floor Trusses(24)
F22 with
F22b • absorptive material in cavity — 31 30
• 15.9 mm Type X gypsum board
F22 with
F22c • no absorptive material in cavity — 28 26
• 12.7 mm Type X gypsum board
F22 with
F22d • absorptive material in cavity — 30 29
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F22 with
F22e • no absorptive material in cavity — 27 25
• 12.7 mm regular gypsum board
F22 with
F22f • absorptive material in cavity — 31 28
• 12.7 mm regular gypsum board
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood trusses spaced not more than 610 mm
F23
o.c.
• with or without absorptive material in cavity
• 2 layers of gypsum board on ceiling side
F23 with
• wood trusses spaced 406 mm o.c.
F23a 1h 34 31
• no absorptive material in cavity
• 15.9 mm Type X gypsum board
F23 with
• wood trusses spaced 610 mm o.c.
F23b 1h 35 31
• no absorptive material in cavity
Wood Floor Trusses(24) • 15.9 mm Type X gypsum board
F23 with
• wood trusses spaced 406 mm o.c. 45 min
F23c 36 34
• absorptive material in cavity [1 h](15)
• 15.9 mm Type X gypsum board
F23 with
• wood trusses spaced 610 mm o.c.
F23d 45 min 37 34
• absorptive material in cavity
• 15.9 mm Type X gypsum board
F23 with
• wood trusses spaced 406 mm o.c.
F23e 1h 32 30
• no absorptive material in cavity
• 12.7 mm Type X gypsum board
F23 with
• wood trusses spaced 610 mm o.c.
F23f 45 min 33 30
• no absorptive material in cavity
• 12.7 mm Type X gypsum board
F23 with
F23g • absorptive material in cavity — 34 33
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 62 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F23 with
F23h • no absorptive material in cavity — 32 30
• 12.7 mm regular gypsum board
F23 with
F23i • absorptive material in cavity — 34 33
• 12.7 mm regular gypsum board
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood trusses spaced not more than 610 mm
o.c.
F24
• with or without absorptive material in cavity
• steel furring channels spaced 406 mm or
610 mm o.c.
• 1 layer of gypsum board on ceiling side
F24 with
• no absorptive material in cavity
F24a — 35 27
• steel furring channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F24 with
Wood Floor Trusses(24) • no absorptive material in cavity
F24b — 37 30
• steel furring channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F24 with
• absorptive material in cavity
F24c — 38 30
• steel furring channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F24 with
• absorptive material in cavity
F24d — 40 33
• steel furring channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F24 with
• no absorptive material in cavity
F24e — 33 26
• steel furring channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F24 with
• no absorptive material in cavity
F24f — 36 29
• steel furring channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F24 with
• absorptive material in cavity
F24g — 37 29
• steel furring channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F24 with
• absorptive material in cavity
F24h — 39 32
• steel furring channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F24 with
• no absorptive material in cavity
F24i — 33 25
• steel furring channels spaced 406 mm
• 12.7 mm regular gypsum board
F24 with
• no absorptive material in cavity
F24j — 35 28
• steel furring channels spaced 610 mm
• 12.7 mm regular gypsum board
F24 with
• absorptive material in cavity
F24k — 36 28
• steel furring channels spaced 406 mm
Wood Floor Trusses(24) • 12.7 mm regular gypsum board
F24 with
• absorptive material in cavity
F24l — 38 31
• steel furring channels spaced 610 mm
• 12.7 mm regular gypsum board
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood trusses spaced not more than 610 mm
F25 o.c.
• with or without absorptive material in cavity
• steel furring channels spaced 406 mm or
610 mm o.c.
• 2 layers
F25 with of gypsum board on ceiling side
• no absorptive material in cavity
F25a 1h 40 32
• steel furring channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F25 with
• no absorptive material in cavity
F25b 1h 42 34
• steel furring channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 64 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F25 with
• absorptive material in cavity
F25c 1h 43 35
• steel furring channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F25 with
• absorptive material in cavity 45 min
F25d 45 37
• steel furring channels spaced 610 mm o.c. [1 h](18)
• 15.9 mm Type X gypsum board
F25 with
• no absorptive material in cavity
F25e 1h 38 30
• steel furring channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F25 with
• no absorptive material in cavity
F25f 1h 40 33
• steel furring channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F25 with
• absorptive material in cavity
F25g 1h 41 33
• steel furring channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
Wood Floor Trusses(24)
F25 with
• absorptive material in cavity 45 min
F25h 43 36
• steel furring channels spaced 610 mm o.c. [1 h](18)
• 12.7 mm Type X gypsum board
F25 with
• no absorptive material in cavity
F25i — 38 30
• steel furring channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F25 with
• no absorptive material in cavity
F25j — 40 33
• steel furring channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F25 with
• absorptive material in cavity
F25k — 41 33
• steel furring channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F25 with
• no absorptive material in cavity
F25l — 43 36
• steel furring channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood trusses spaced not more than
610 mm o.c.
• with or without absorptive material in cavity
• 1 layer of gypsum board attached directly to
F26
trusses on ceiling side
• resilient metal channels spaced 406 mm or 610
mm o.c. attached to trusses through the gypsum
board
• 1 layer of gypsum board attached to resilient
metal channels
F26 with
• no absorptive material in cavity
F26a • 15.9 mm Type X gypsum board — 35 27
• resilient metal channels
• 15.9 mm Type X gypsum board
F26 with
• absorptive material in cavity
F26b • 15.9 mm Type X gypsum board — 37 30
• resilient metal channels
Wood Floor Trusses(24) • 15.9 mm Type X gypsum board
F26 with
• no absorptive material in cavity
F26c • 12.7 mm Type X gypsum board — 35 27
• resilient metal channels
• 12.7 mm Type X gypsum board
F26 with
• absorptive material in cavity
F26d • 12.7 mm Type X gypsum board — 37 30
• resilient metal channels
• 12.7 mm Type X gypsum board
F26 with
• no absorptive material in cavity
F26e • 12.7 mm regular gypsum board — 32 26
• resilient metal channels
• 12.7 mm regular gypsum board
F26 with
• absorptive material in cavity
F26f • 12.7 mm regular gypsum board — 35 28
• resilient metal channels
• 12.7 mm regular gypsum board
Column 1 2 3 4 5 6
Page 66 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood trusses spaced not more than
610 mm o.c.
F27
• with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 1 layer of gypsum board on ceiling side
F27 with
• no absorptive material in cavity
F27a — 41 33
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F27 with
• no absorptive material in cavity
F27b — 43 36
• resilient metal channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F27 with
• absorptive material in cavity 30 min
F27c 48 41
• resilient metal channels spaced 406 mm o.c. [45 min](25)
• 15.9 mm Type X gypsum board
Wood Floor Trusses(24)
F27 with
• absorptive material in cavity
F27d — 50 44
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F27 with
• no absorptive material in cavity
F27e — 40 32
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F27 with
• no absorptive material in cavity
F27f — 42 35
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F27 with
• absorptive material in cavity
F27g — 47 40
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F27 with
• absorptive material in cavity
F27h — 49 43
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F27 with
• no absorptive material in cavity
F27i — 39 31
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F27 with
• no absorptive material in cavity
F27j — 41 34
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F27 with
• absorptive material in cavity
F27k — 46 39
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F27 with
• absorptive material in cavity
F27l — 48 42
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood trusses spaced not more than 610 mm
Wood Floor Trusses(24) F28 o.c.
• with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 2 layers
F28 with of gypsum board on ceiling side
• no absorptive material in cavity
F28a 1h 46 38
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F28 with
• no absorptive material in cavity
F28b 1h 48 40
• resilient metal channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F28 with
• absorptive material in cavity
F28c 1h 54 46
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F28 with
• absorptive material in cavity 45 min
F28d 55 48
• resilient metal channels spaced 610 mm o.c. [1 h](18)
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 68 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F28 with
• no absorptive material in cavity
F28e 1h 44 36
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F28 with
• no absorptive material in cavity
F28f 1h 46 39
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F28 with
• absorptive material in cavity
F28g 1h 51 44
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F28 with
• absorptive material in cavity 45 min
F28h 53 47
• resilient metal channels spaced 610 mm o.c. [1 h](18)
• 12.7 mm Type X gypsum board
Wood Floor Trusses(24)
F28 with
• no absorptive material in cavity
F28i — 44 36
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F28 with
• no absorptive material in cavity
F28j — 46 39
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F28 with
• absorptive material in cavity
F28k — 51 44
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F28 with
• absorptive material in cavity
F28l — 53 47
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
• one subfloor layer 11 mm sanded plywood, or
OSB
or waferboard
• one subfloor layer of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
F29 • on wood trusses spaced not more than 610 mm
o.c.
• with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 1 layer of gypsum board on ceiling side
F29 with
• no absorptive material in cavity
F29a — 44 35
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F29 with
• no absorptive material in cavity
F29b — 46 37
• resilient metal channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F29 with
• absorptive material in cavity 30 min
F29c 51 43
Wood Floor Trusses(24) • resilient metal channels spaced 406 mm o.c. [45 min](25)
• 15.9 mm Type X gypsum board
F29 with
• absorptive material in cavity
F29d — 53 45
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F29 with
• no absorptive material in cavity
F29e — 43 33
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F29 with
• no absorptive material in cavity
F29f — 45 36
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F29 with
• absorptive material in cavity
F29g — 50 41
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F29 with
• absorptive material in cavity
F29h — 52 44
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 70 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F29 with
• no absorptive material in cavity
F29i — 42 34
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F29 with
• no absorptive material in cavity
F29j — 44 36
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F29 with
• absorptive material in cavity
F29k — 49 41
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F29 with
• absorptive material in cavity
F29l — 51 44
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• one subfloor layer 11 mm sanded plywood, or
OSB
or waferboard
• one subfloor layer of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
Wood Floor Trusses(24) F30 • on wood trusses spaced not more than 610 mm
o.c.
• with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 2 layers of gypsum board on ceiling side
F30 with
• no absorptive material in cavity
F30a 1h 49 39
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F30 with
• no absorptive material in cavity
F30b 1h 51 42
• resilient metal channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F30 with
• absorptive material in cavity 1h 56 47
F30c
• resilient metal channels spaced 406 mm o.c. [1.5 h](26) [58](26) [50](26)
• 15.9 mm Type X gypsum board
F30 with
• absorptive material in cavity 45 min
F30d 58 50
• resilient metal channels spaced 610 mm o.c. [1 h](18)
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F30 with
• no absorptive material in cavity
F30e 1h 47 38
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F30 with
• no absorptive material in cavity
F30f 1h 49 40
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F30 with
• absorptive material in cavity
F30g 1h 54 46
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F30 with
• absorptive material in cavity 45 min
F30h 56 48
• resilient metal channels spaced 610 mm o.c. [1 h](18)
• 12.7 mm Type X gypsum board
F30 with
• no absorptive material in cavity
F30i — 47 37
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
Wood Floor Trusses(24)
F30 with
• no absorptive material in cavity
F30j — 49 40
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F30 with
• absorptive material in cavity
F30k — 54 45
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F30 with
• absorptive material in cavity
F30l — 56 48
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• 25 mm gypsum-concrete topping (at least
44 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
F31
• on wood trusses spaced not more than 610 mm
o.c.
• with or without absorptive material in cavity
• 1 layer of gypsum board on ceiling side
Column 1 2 3 4 5 6
Page 72 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F31 with
F31a • no absorptive material in cavity — 41 17
• 15.9 mm Type X gypsum board
F31 with
F31b • absorptive material in cavity — 43 20
• 15.9 mm Type X gypsum board
F31 with
F31c • no absorptive material in cavity — 40 17
• 12.7 mm Type X gypsum board
F31 with
F31d • absorptive material in cavity — 42 20
• 12.7 mm Type X gypsum board
F31 with
F31e • no absorptive material in cavity — 39 16
• 12.7 mm regular gypsum board
F31 with
F31f • absorptive material in cavity — 41 19
• 12.7 mm regular gypsum board
Wood Floor Trusses(24) • 25 mm gypsum-concrete topping (at least
44 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
F32
• on wood trusses spaced not more than 610 mm
o.c.
• with or without absorptive material in cavity
• 2 layers of gypsum board on ceiling side
F32 with
• wood trusses spaced 406 mm o.c.
F32a 1h 46 20
• no absorptive material in cavity
• 15.9 mm Type X gypsum board
F32 with
• wood trusses spaced 610 mm o.c.
F32b 1h 47 20
• no absorptive material in cavity
• 15.9 mm Type X gypsum board
F32 with
• wood trusses spaced 406 mm o.c. 45 min
F32c 48 23
• absorptive material in cavity [1 h](15)
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F32 with
• wood trusses spaced 610 mm o.c.
F32d 45 min 49 23
• absorptive material in cavity
• 15.9 mm Type X gypsum board
F32 with
• wood trusses spaced 406 mm o.c.
F32e 1h 44 19
• no absorptive material in cavity
• 12.7 mm Type X gypsum board
F32 with
• wood trusses spaced 610 mm o.c.
F32f 45 min 45 19
• no absorptive material in cavity
• 12.7 mm Type X gypsum board
F32 with
F32g • absorptive material in cavity — 46 19
• 12.7 mm Type X gypsum board
F32 with
F32h • no absorptive material in cavity — 44 19
• 12.7 mm regular gypsum board
F32 with
Wood Floor Trusses(24)
F32i • absorptive material in cavity — 46 22
• 12.7 mm regular gypsum board
• 25 mm gypsum-concrete topping (at least
44 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood trusses spaced not more than 610 mm
F33
o.c.
• with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 1 layer of gypsum board on ceiling side
F33 with
• no absorptive material in cavity
F33a — 53 26
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F33 with
• no absorptive material in cavity
F33b — 55 26
• resilient metal channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 74 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F33 with
• absorptive material in cavity 30 min
F33c 60 34
• resilient metal channels spaced 406 mm o.c. [45 min](25)
• 15.9 mm Type X gypsum board
F33 with
• absorptive material in cavity
F33d — 62 34
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F33 with
• no absorptive material in cavity
F33e — 52 26
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F33 with
• no absorptive material in cavity
F33f — 54 26
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F33 with
• absorptive material in cavity
F33g — 59 34
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
Wood Floor Trusses(24)
F33 with
• absorptive material in cavity
F33h — 61 34
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F33 with
• no absorptive material in cavity
F33i — 51 25
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F33 with
• no absorptive material in cavity
F33j — 53 25
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F33 with
• absorptive material in cavity
F33k — 58 33
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F33 with
• absorptive material in cavity
F33l — 60 33
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
• 25 mm gypsum-concrete topping (at least
44 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood trusses spaced not more than 610 mm
F34
o.c.
• with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 2 layers of gypsum board on ceiling side
F34 with
• no absorptive material in cavity
F34a 1h 57 29
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F34 with
• no absorptive material in cavity
F34b 1h 60 29
• resilient metal channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F34 with
Wood Floor Trusses(24) • absorptive material in cavity 1h 65
F34c 37
• resilient metal channels spaced 406 mm o.c. [1.5 h](26) [67](26)
• 15.9 mm Type X gypsum board
F34 with
• absorptive material in cavity 45 min
F34d 67 37
• resilient metal channels spaced 610 mm o.c. [1 h](18)
• 15.9 mm Type X gypsum board
F34 with
• no absorptive material in cavity
F34e 1h 56 28
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F34 with
• no absorptive material in cavity
F34f 1h 58 28
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F34 with
• absorptive material in cavity
F34g 1h 63 36
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 76 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F34 with
• absorptive material in cavity 45 min
F34h 65 36
• resilient metal channels spaced 610 mm o.c. [1 h](18)
• 12.7 mm Type X gypsum board
F34 with
• no absorptive material in cavity
F34i — 56 28
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F34 with
• no absorptive material in cavity
F34j — 58 28
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F34 with
• absorptive material in cavity
F34k — 63 36
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F34 with
• absorptive material in cavity
F34l — 65 36
• resilient metal channels spaced 610 mm o.c.
Wood Floor Trusses(24) • 12.7 mm regular gypsum board
• 38 mm concrete topping (at least 70 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
F35 • on wood trusses spaced not more than 610 mm
o.c.
• with or without absorptive material in cavity
• 1 layer of gypsum board on ceiling side
F35 with
F35a • no absorptive material in cavity — 45 26
• 15.9 mm Type X gypsum board
F35 with
F35b • absorptive material in cavity — 47 29
• 15.9 mm Type X gypsum board
F35 with
F35c • no absorptive material in cavity — 43 26
• 12.7 mm Type X gypsum board
F35 with
F35d • absorptive material in cavity — 45 29
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F35 with
F35e • no absorptive material in cavity — 43 26
• 12.7 mm regular gypsum board
F35 with
F35f • absorptive material in cavity — 45 29
• 12.7 mm regular gypsum board
• 38 mm concrete topping (at least 70 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
F36 • on wood trusses spaced not more than 610 mm
o.c.
• with or without absorptive material in cavity
• 2 layers of gypsum board on ceiling side
F36 with
• wood trusses spaced 406 mm o.c.
F36a 1h 49 28
• no absorptive material in cavity
• 15.9 mm Type X gypsum board
F36 with
Wood Floor Trusses(24) • wood trusses spaced 610 mm o.c.
F36b 1h 50 28
• no absorptive material in cavity
• 15.9 mm Type X gypsum board
F36 with
• wood trusses spaced 406 mm o.c. 45 min
F36c 51 31
• absorptive material in cavity [1 h](15)
• 15.9 mm Type X gypsum board
F36 with
• wood trusses spaced 610 mm o.c.
F36d 45 min 52 31
• absorptive material in cavity
• 15.9 mm Type X gypsum board
F36 with
• wood trusses spaced 406 mm o.c.
F36e 1h 48 27
• no absorptive material in cavity
• 12.7 mm Type X gypsum board
F36 with
• wood trusses spaced 610 mm o.c.
F36f 45 min 49 27
• no absorptive material in cavity
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 78 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F36 with
F36g • absorptive material in cavity — 50 30
• 12.7 mm Type X gypsum board
F36 with
F36h • no absorptive material in cavity — 47 27
• 12.7 mm regular gypsum board
F36 with
F36i • absorptive material in cavity — 49 30
• 12.7 mm regular gypsum board
• 38 mm concrete topping (at least 70 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood trusses spaced not more than 610 mm
F37 o.c.
• with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 1 layer of gypsum board on ceiling side
F37 with
Wood Floor Trusses(24) • no absorptive material in cavity
F37a 45 min 56 35
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F37 with
• no absorptive material in cavity
F37b — 59 35
• resilient metal channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F37 with
• absorptive material in cavity 30 min
F37c 63 43
• resilient metal channels spaced 406 mm o.c. [45 min](25)
• 15.9 mm Type X gypsum board
F37 with
• absorptive material in cavity
F37d — 66 43
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F37 with
• no absorptive material in cavity
F37e — 55 35
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F37 with
• no absorptive material in cavity
F37f — 57 35
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F37 with
• absorptive material in cavity
F37g — 62 43
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F37 with
• absorptive material in cavity
F37h — 64 43
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F37 with
• no absorptive material in cavity
F37i — 54 35
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F37 with
• no absorptive material in cavity
F37j — 57 35
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
Wood Floor Trusses(24) F37 with
• absorptive material in cavity
F37k — 61 43
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F37 with
• absorptive material in cavity
F37l — 64 43
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• 38 mm concrete topping (at least 70 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on wood trusses spaced not more than 610 mm
F38 o.c.
• with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 2 layers of gypsum board on ceiling side
F38 with
• no absorptive material in cavity
F38a 1h 61 37
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 80 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F38 with
• no absorptive material in cavity
F38b 1h 63 37
• resilient metal channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F38 with
• absorptive material in cavity 1h 69
F38c 45
• resilient metal channels spaced 406 mm o.c. [1.5 h](26) [71](26)
• 15.9 mm Type X gypsum board
F38 with
• absorptive material in cavity
F38d 1h 70 45
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F38 with
• no absorptive material in cavity
F38e 1h 60 36
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F38 with
• no absorptive material in cavity
F38f 1h 62 36
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
Wood Floor Trusses(24)
F38 with
• absorptive material in cavity
F38g 1h 67 44
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F38 with
• absorptive material in cavity
F38h 1h 69 44
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F38 with
• no absorptive material in cavity
F38i — 59 36
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F38 with
• no absorptive material in cavity
F38j — 61 36
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F38 with
• absorptive material in cavity
F38k — 66 44
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F38 with
• absorptive material in cavity
Wood Floor Trusses(24) F38l — 68 44
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
F39 • on steel joists spaced not more than 610 mm o.c.
• with or without absorptive material in cavity
• 1 layer of gypsum board on ceiling side
F39 with
F39a • no absorptive material in cavity — 29 27
• 15.9 mm Type X gypsum board
F39 with
F39b • absorptive material in cavity — 31 30
• 15.9 mm Type X gypsum board
F39 with
F39c • no absorptive material in cavity — 27 26
• 12.7 mm Type X gypsum board
F39 with
Cold Formed Steel F39d • absorptive material in cavity — 29 29
Floor Joists(27) • 12.7 mm Type X gypsum board
F39 with
F39e • no absorptive material in cavity — 27 25
• 12.7 mm regular gypsum board
F39 with
F39f • absorptive material in cavity — 29 28
• 12.7 mm regular gypsum board
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
F40 • on steel joists spaced not more than 610 mm o.c.
• with or without absorptive material in cavity
• 2 layers of gypsum board on ceiling side
F40 with
• steel joists spaced 406 mm o.c.
F40a 1h 34 31
• no absorptive material in cavity
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 82 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F40 with
• steel joists spaced 610 mm o.c.
F40b 45 min 35 31
• no absorptive material in cavity
• 15.9 mm Type X gypsum board
F40 with
• steel joists spaced 406 mm o.c.
F40c 45 min 36 34
• absorptive material in cavity
• 15.9 mm Type X gypsum board
F40 with
• steel joists spaced 610 mm o.c.
F40d 45 min 37 34
• absorptive material in cavity
• 15.9 mm Type X gypsum board
F40 with
• steel joists spaced 406 mm o.c.
F40e 1h 32 30
• no absorptive material in cavity
• 12.7 mm Type X gypsum board
Cold Formed Steel F40 with
Floor Joists(27) • steel joists spaced 610 mm o.c.
F40f 45 min 33 30
• no absorptive material in cavity
• 12.7 mm Type X gypsum board
F40 with
• steel joists spaced 406 mm o.c.
F40g 45 min 34 33
• absorptive material in cavity
• 12.7 mm Type X gypsum board
F40 with
• steel joists spaced 610 mm o.c.
F40h 45 min 35 33
• absorptive material in cavity
• 12.7 mm Type X gypsum board
F40 with
F40i • no absorptive material in cavity — 31 30
• 12.7 mm regular gypsum board
F40 with
F40j • absorptive material in cavity — 33 33
• 12.7 mm regular gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on steel joists spaced not more than 610 mm o.c.
F41 • with or without absorptive material in cavity
• steel furring channels spaced 406 mm or
610 mm o.c.
• 1 layer of gypsum board on ceiling side
F41 with
• no absorptive material in cavity
F41a — 34 27
• steel furring channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F41 with
• no absorptive material in cavity
F41b — 37 30
• steel furring channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F41 with
• absorptive material in cavity 30 min
F41c 37 30
• steel furring channels spaced 406 mm o.c. [45 min](25)
• 15.9 mm Type X gypsum board
Cold Formed Steel F41 with
Floor Joists(27) • absorptive material in cavity
F41d 30 min 40 33
• steel furring channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F41 with
• no absorptive material in cavity
F41e — 33 26
• steel furring channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F41 with
• no absorptive material in cavity
F41f — 35 29
• steel furring channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F41 with
• absorptive material in cavity 30 min
F41g 36 29
• steel furring channels spaced 406 mm o.c. [45 min](25)
• 12.7 mm Type X gypsum board
F41 with
• absorptive material in cavity
F41h 30 min 38 32
• steel furring channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 84 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F41 with
• no absorptive material in cavity
F41i < 30 min 32 25
• steel furring channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F41 with
• no absorptive material in cavity
F41j < 30 min 35 28
• steel furring channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F41 with
• absorptive material in cavity
F41k < 30 min 35 28
• steel furring channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F41 with
• absorptive material in cavity
F41l < 30 min 38 31
• steel furring channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on steel joists spaced not more than 610 mm o.c.
Cold Formed Steel F42 • with or without absorptive material in cavity
Floor Joists(27) • steel furring channels spaced 406 mm or
610 mm o.c.
• 2 layers of gypsum board on ceiling side
F42 with
• no absorptive material in cavity
F42a 1h 39 32
• steel furring channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F42 with
• steel joists spaced 406 mm o.c.
F42b • no absorptive material in cavity 45 min 42 34
• steel furring channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F42 with
• steel joists spaced 610 mm o.c.
F42c • no absorptive material in cavity 45 min 43 34
• steel furring channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F42 with
• absorptive material in cavity
F42d 1h 42 35
• steel furring channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F42 with
• steel joists spaced 406 mm o.c.
45 min
F42e • absorptive material in cavity 45 37
[1 h](28)
• steel furring channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F42 with
• steel joists spaced 610 mm o.c.
45 min
F42f • absorptive material in cavity 46 37
[1 h](15)
• steel furring channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F42 with
• no absorptive material in cavity
F42g 1h 38 30
• steel furring channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F42 with
• steel joists spaced 406 mm o.c.
F42h • no absorptive material in cavity 45 min 40 33
• steel furring channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F42 with
Cold Formed Steel • steel joists spaced 610 mm o.c.
Floor Joists(27) F42i • no absorptive material in cavity 45 min 41 33
• steel furring channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F42 with
• absorptive material in cavity
F42j 1h 41 33
• steel furring channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F42 with
• steel joists spaced 406 mm o.c.
45 min
F42k • absorptive material in cavity 43 36
[1 h](28)
• steel furring channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F42 with
• steel joists spaced 610 mm o.c.
45 min
F42l • absorptive material in cavity 44 36
[1 h](15)
• steel furring channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F42 with
• no absorptive material in cavity
F42m — 37 30
• steel furring channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
Column 1 2 3 4 5 6
Page 86 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F42 with
• no absorptive material in cavity
F42n — 39 33
• steel furring channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F42 with
• absorptive material in cavity
F42o — 40 33
• steel furring channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F42 with
• absorptive material in cavity
F42p — 42 36
• steel furring channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on steel joists spaced not more than 610 mm o.c.
• with or without absorptive material in cavity
• 1 layer of gypsum board attached directly to joists
F43 on ceiling side
Cold Formed Steel • resilient metal channels spaced 406 mm or
Floor Joists(27) 610 mm o.c. attached to joists through the
gypsum board
• 1 layer of gypsum board attached to resilient
metal channels
F43 with
• no absorptive material in cavity
F43a • 15.9 mm Type X gypsum board 1h 35 37
• resilient metal channels
• 15.9 mm Type X gypsum board
F43 with
• absorptive material in cavity
F43b • 15.9 mm Type X gypsum board 1h 37 30
• resilient metal channels
• 15.9 mm Type X gypsum board
F43 with
• no absorptive material in cavity
F43c • 12.7 mm Type X gypsum board 1h 35 27
• resilient metal channels
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F43 with
• absorptive material in cavity
F43d • 12.7 mm Type X gypsum board 1h 37 30
• resilient metal channels
• 12.7 mm Type X gypsum board
F43 with
• no absorptive material in cavity
F43e • 12.7 mm regular gypsum board — 32 26
• resilient metal channels
• 12.7 mm regular gypsum board
F43 with
• absorptive material in cavity
F43f • 12.7 mm regular gypsum board — 35 28
• resilient metal channels
• 12.7 mm regular gypsum board
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on steel joists spaced not more than 610 mm o.c.
Cold Formed Steel F44 • with or without absorptive material in cavity
Floor Joists(27) • resilient metal channels spaced 406 mm or
610 mm o.c.
• 1 layer of gypsum board on ceiling side
F44 with
• no absorptive material in cavity
F44a — 40 33
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F44 with
• no absorptive material in cavity
F44b — 43 36
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F44 with
• absorptive material in cavity 30 min
F44c 47 41
• resilient metal channels spaced 406 mm o.c. [45 min](25)
• 15.9 mm Type X gypsum board
F44 with
• absorptive material in cavity
F44d 30 min 50 44
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 88 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F44 with
• no absorptive material in cavity
F44e — 39 32
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F44 with
• no absorptive material in cavity
F44f — 41 35
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F44 with
• absorptive material in cavity 30 min
F44g 46 40
• resilient metal channels spaced 406 mm o.c. [45 min](25)
• 12.7 mm Type X gypsum board
F44 with
• absorptive material in cavity
F44h 30 min 48 43
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F44 with
• no absorptive material in cavity
F44i < 30 min 38 31
• resilient metal channels spaced 406 mm o.c.
Cold Formed Steel • 12.7 regular gypsum board
Floor Joists(27)
F44 with
• no absorptive material in cavity
F44j < 30 min 41 34
• resilient metal channels spaced 610 mm o.c.
• 12.7 regular gypsum board
F44 with
• absorptive material in cavity
F44k < 30 min 45 39
• resilient metal channels spaced 406 mm o.c.
• 12.7 regular gypsum board
F44 with
• absorptive material in cavity
F44l < 30 min 48 42
• resilient metal channels spaced 610 mm o.c.
• 12.7 regular gypsum board
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on steel joists spaced not more than 610 mm o.c.
F45 • with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 2 layers of gypsum board on ceiling side
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F45 with
• no absorptive material in cavity
F45a 1h 45 38
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F45 with
• steel joists spaced 406 mm
F45b • no absorptive material in cavity 45 min 48 40
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F45 with
• steel joists spaced 610 mm
F45c • no absorptive material in cavity 45 min 49 40
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F45 with
• absorptive material in cavity
F45d 1h 52 46
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
Cold Formed Steel
Floor Joists(27) F45 with
• steel joists spaced 406 mm
45 min
F45e • absorptive material in cavity 55 48
[1 h](28)
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F45 with
• steel joists spaced 610 mm
45 min
F45f • absorptive material in cavity 56 48
[1 h](15)
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F45 with
• no absorptive material in cavity
F45g 1h 44 36
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F45 with
• steel joists spaced 406 mm
F45h • no absorptive material in cavity 45 min 46 39
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 90 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F45 with
• steel joists spaced 610 mm
F45i • no absorptive material in cavity 45 min 47 39
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F45 with
• absorptive material in cavity
F45j 1h 51 44
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F45 with
• steel joists spaced 406 mm o.c.
45 min
F45k • absorptive material in cavity 53 47
[1 h](28)
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F45 with
• steel joists spaced 610 mm
45 min
F45l • absorptive material in cavity 54 47
Cold Formed Steel [1 h](15)
• resilient metal channels spaced 610 mm o.c.
Floor Joists(27) • 12.7 mm Type X gypsum board
F45 with
• no absorptive material in cavity
F45m — 43 36
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F45 with
• no absorptive material in cavity
F45n — 45 39
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F45 with
• absorptive material in cavity
F45o — 50 44
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F45 with
• absorptive material in cavity
F45p — 52 47
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
• one subfloor layer of 11 mm sanded plywood, or
OSB or waferboard
• one subfloor layer of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
F46 • on steel joists spaced not more than 610 mm o.c.
• with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 1 layer of gypsum board on ceiling side
F46 with
• no absorptive material in cavity
F46a — 43 34
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F46 with
• no absorptive material in cavity
F46b — 46 37
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F46 with
• absorptive material in cavity
F46c — 50 42
• resilient metal channels spaced 406 mm o.c.
Cold Formed Steel
• 15.9 mm Type X gypsum board
Floor Joists(27)
F46 with
• absorptive material in cavity
F46d — 53 45
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F46 with
• no absorptive material in cavity
F46e — 42 33
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F46 with
• no absorptive material in cavity
F46f — 44 36
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F46 with
• absorptive material in cavity
F46g — 49 41
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F46 with
• absorptive material in cavity
F46h — 51 44
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 92 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F46 with
• no absorptive material in cavity
F46i — 41 33
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F46 with
• no absorptive material in cavity
F46j — 44 36
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F46 with
• absorptive material in cavity
F46k — 48 41
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F46 with
• absorptive material in cavity
F46l — 51 44
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• one subfloor layer of 15.5 mm plywood or OSB or
waferboard
• one subfloor layer of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
Cold Formed Steel
Floor Joists(27) F47 • on steel joists spaced not more than 406 mm o.c.
• with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 1 layer of gypsum board on ceiling side
F47 with
• no absorptive material in cavity
F47a 30 min 45 35
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F47 with
• no absorptive material in cavity
F47b 30 min 47 38
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F47 with
30 min
• absorptive material in cavity
F47c [45 min](18) 51 45
• resilient metal channels spaced 406 mm o.c.
[1 h](28)
• 15.9 mm Type X gypsum board
F47 with
• absorptive material in cavity [30 min](18)
F47d 53 47
• resilient metal channels spaced 610 mm o.c. [45 min](28)
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F47 with
• no absorptive material in cavity
F47e 30 min 43 44
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F47 with
• no absorptive material in cavity
F47f — 45 47
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F47 with
• absorptive material in cavity [30 min](18)
F47g 50 43
• resilient metal channels spaced 406 mm o.c. [45 min](28)
• 12.7 mm Type X gypsum board
F47 with
• absorptive material in cavity
F47h — 52 46
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
• one subfloor layer of 11 mm sanded plywood, or
OSB or waferboard
• one subfloor layer of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
Cold Formed Steel
Floor Joists(27) F48 • on steel joists spaced not more than 610 mm o.c.
• with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 2 layers of gypsum board on ceiling side
F48 with
• no absorptive material in cavity
F48a 1h 48 39
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F48 with
• no absorptive material in cavity
F48b 1h 50 42
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F48 with
• absorptive material in cavity
F48c 1h 56 47
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F48 with
• absorptive material in cavity
F48d 1h 57 50
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 94 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F48 with
• no absorptive material in cavity
F48e 1h 47 38
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F48 with
• no absorptive material in cavity
F48f — 49 40
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F48 with
• absorptive material in cavity
F48g 1h 54 46
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F48 with
• absorptive material in cavity
F48h — 56 48
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F48 with
• no absorptive material in cavity
F48i — 46 37
• resilient metal channels spaced 406 mm o.c.
Cold Formed Steel • 12.7 mm regular gypsum board
Floor Joists(27)
F48 with
• no absorptive material in cavity
F48j — 48 40
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F48 with
• absorptive material in cavity
F48k — 53 45
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F48 with
• absorptive material in cavity
F48l — 55 48
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• 25 mm gypsum-concrete topping (at least
44 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
F49 waferboard, or 17 mm tongue and groove lumber
• on steel joists spaced not more than 610 mm o.c.
• with or without absorptive material in cavity
• 1 layer of gypsum board on ceiling side
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F49 with
F49a • no absorptive material in cavity — 40 13
• 15.9 mm Type X gypsum board
F49 with
F49b • absorptive material in cavity — 42 16
• 15.9 mm Type X gypsum board
F49 with
F49c • no absorptive material in cavity — 39 12
• 12.7 mm Type X gypsum board
F49 with
F49d • absorptive material in cavity — 41 15
• 12.7 mm Type X gypsum board
F49 with
F49e • no absorptive material in cavity — 38 12
• 12.7 mm regular gypsum board
F49 with
F49f • absorptive material in cavity — 40 15
• 12.7 mm regular gypsum board
Cold Formed Steel
Floor Joists(27) • 25 mm gypsum-concrete topping (at least
44 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
F50 waferboard, or 17 mm tongue and groove lumber
• on steel joists spaced not more than 610 mm o.c.
• with or without absorptive material in cavity
• 2 layers of gypsum board on ceiling side
F50 with
F50a • no absorptive material in cavity — 45 16
• 15.9 mm Type X gypsum board
F50 with
F50b • absorptive material in cavity — 47 19
• 15.9 mm Type X gypsum board
F50 with
F50c • no absorptive material in cavity — 44 15
• 12.7 mm Type X gypsum board
F50 with
F50d • absorptive material in cavity — 46 18
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 96 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F50 with
F50e • no absorptive material in cavity — 43 14
• 12.7 mm regular gypsum board
F50 with
F50f • absorptive material in cavity — 45 17
• 12.7 mm regular gypsum board
• 25 mm gypsum-concrete topping (at least
44 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
F51 • on steel joists spaced not more than 610 mm o.c.
• with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 1 layer of gypsum board on ceiling side
F51 with
• no absorptive material in cavity
F51a — 52 22
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
Cold Formed Steel F51 with
Floor Joists(27) • no absorptive material in cavity
F51b — 54 22
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F51 with
• absorptive material in cavity
F51c — 59 30
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F51 with
• absorptive material in cavity
F51d — 61 30
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F51 with
• no absorptive material in cavity
F51e — 51 21
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F51 with
• no absorptive material in cavity
F51f — 53 21
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F51 with
• absorptive material in cavity
F51g — 58 29
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F51 with
• absorptive material in cavity
F51h — 60 29
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F51 with
• no absorptive material in cavity
F51i — 50 21
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F51 with
• no absorptive material in cavity
F51j — 52 21
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F51 with
• absorptive material in cavity
F51k — 57 29
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
Cold Formed Steel
F51 with
Floor Joists(27)
• absorptive material in cavity
F51l — 59 29
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• 25 mm gypsum-concrete topping (at least
44 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
F52 • on steel joists spaced not more than 610 mm o.c.
• with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 2 layers of gypsum board on ceiling side
F52 with
• no absorptive material in cavity
F52a 1h 57 25
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F52 with
• no absorptive material in cavity
F52b 1h 59 25
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 98 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F52 with
• absorptive material in cavity
F52c 1h 64 33
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F52 with
• absorptive material in cavity 45 min
F52d 66 33
• resilient metal channels spaced 610 mm o.c. [1 h](25)
• 15.9 mm Type X gypsum board
F52 with
• no absorptive material in cavity
F52e 1h 55 24
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F52 with
• no absorptive material in cavity
F52f 1h 58 24
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F52 with
• absorptive material in cavity
F52g 1h 62 32
• resilient metal channels spaced 406 mm o.c.
Cold Formed Steel • 12.7 mm Type X gypsum board
Floor Joists(25) F52 with
• absorptive material in cavity 45 min
F52h 65 32
• resilient metal channels spaced 610 mm o.c. [1 h](25)
• 12.7 mm Type X gypsum board
F52 with
• no absorptive material in cavity
F52i — 55 23
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F52 with
• no absorptive material in cavity
F52j — 57 23
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F52 with
• absorptive material in cavity
F52k — 62 31
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F52 with
• absorptive material in cavity
F52l — 64 31
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
• 38 mm concrete topping (at least 70 kg/m2)
• subfloor of 12.5 mm plywood, OSB or
F53 waferboard, or 17 mm tongue and groove lumber
• on steel joists spaced not more than 610 mm o.c.
• 1 layer of gypsum board on ceiling side
F53 with
F53a • no absorptive material in cavity — 44 22
• 15.9 mm Type X gypsum board
F53 with
F53b • absorptive material in cavity — 46 25
• 15.9 mm Type X gypsum board
F53 with
F53c • no absorptive material in cavity — 42 21
• 12.7 mm Type X gypsum board
F53 with
F53d • absorptive material in cavity — 44 24
Cold Formed Steel • 12.7 mm Type X gypsum board
Floor Joists(27)
F53 with
F53e • no absorptive material in cavity — 42 21
• 12.7 mm regular gypsum board
F53 with
F53f • absorptive material in cavity — 44 24
• 12.7 mm regular gypsum board
• 38 mm concrete topping (at least 70 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
F54 waferboard, or 17 mm tongue and groove lumber
• on steel joists spaced not more than 610 mm o.c.
• 2 layers of gypsum board on ceiling side
F54 with
F54a • no absorptive material in cavity — 48 24
• 15.9 mm Type X gypsum board
F54 with
F54b • absorptive material in cavity — 50 27
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 100 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F54 with
F54c • no absorptive material in cavity — 47 23
• 12.7 mm Type X gypsum board
F54 with
F54d • absorptive material in cavity — 49 26
• 12.7 mm Type X gypsum board
F54 with
F54e • no absorptive material in cavity — 47 23
• 12.7 mm regular gypsum board
F54 with
F54f • absorptive material in cavity — 49 26
• 12.7 mm regular gypsum board
• 38 mm concrete topping (at least 70 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on steel joists spaced not more than 610 mm o.c.
F55
• with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 1 layer of gypsum board on ceiling side
F55 with
Cold Formed Steel • no absorptive material in cavity
Floor Joists(27) F55a — 56 31
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F55 with
• no absorptive material in cavity
F55b — 58 31
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F55 with
• absorptive material in cavity
F55c — 63 39
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F55 with
• absorptive material in cavity
F55d — 65 39
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F55 with
• no absorptive material in cavity
F55e — 54 30
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F55 with
• no absorptive material in cavity
F55f — 56 30
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F55 with
• absorptive material in cavity
F55g — 61 38
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F55 with
• absorptive material in cavity
F55h — 63 38
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F55 with
• no absorptive material in cavity
F55i — 54 30
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F55 with
• no absorptive material in cavity
F55j — 56 30
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F55 with
• absorptive material in cavity
F55k — 61 38
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
Cold Formed Steel
F55 with
Floor Joists(27)
• absorptive material in cavity
F55l — 63 38
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• 38 mm concrete topping (at least 70 kg/m2)
• subfloor of 15.5 mm plywood, OSB or
waferboard, or 17 mm tongue and groove lumber
• on steel joists spaced not more than 610 mm o.c.
F56
• with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 2 layers of gypsum board on ceiling side
F56 with
• no absorptive material in cavity
56a 1h 60 33
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F56 with
• no absorptive material in cavity
56b 1h 62 33
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 102 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F56 with
• absorptive material in cavity
F56c 1h 67 41
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F56 with
• absorptive material in cavity 45 min
F56d 69 41
• resilient metal channels spaced 610 mm o.c. [1 h](25)
• 15.9 mm Type X gypsum board
F56 with
• no absorptive material in cavity
F56e 1h 59 32
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F56 with
• no absorptive material in cavity
F56f 1h 61 32
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F56 with
• absorptive material in cavity
F56g 1h 66 40
• resilient metal channels spaced 406 mm o.c.
Cold Formed Steel • 12.7 mm Type X gypsum board
Floor Joists(27) F56 with
• absorptive material in cavity 45 min
F56h 68 40
• resilient metal channels spaced 610 mm o.c. [1 h](25)
• 12.7 mm Type X gypsum board
F56 with
• no absorptive material in cavity
F56i — 58 32
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F56 with
• no absorptive material in cavity
F56j — 61 32
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F56 with
• absorptive material in cavity
F56k — 65 40
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F56 with
• absorptive material in cavity
F56l — 68 40
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
• 50 mm concrete
• 0.46 mm metal pan with a 19 mm rib
F57
• on steel joists spaced not more than 610 mm o.c.
• 1 layer of gypsum board on ceiling side
F57 with
F57a • no absorptive material in cavity — 45 26
• 15.9 mm Type X gypsum board
F57 with
F57b • absorptive material in cavity — 47 29
• 15.9 mm Type X gypsum board
F57 with
F57c • no absorptive material in cavity — 44 25
• 12.7 mm Type X gypsum board
F57 with
F57d • absorptive material in cavity — 46 28
Cold Formed Steel • 12.7 mm Type X gypsum board
Floor Joists(27) F57 with
F57e • no absorptive material in cavity — 43 25
• 12.7 mm regular gypsum board
F57 with
F57f • absorptive material in cavity — 45 28
• 12.7 mm regular gypsum board
• 50 mm concrete
• 0.38 mm metal pan with a 16 mm rib
F58
• on steel joists spaced not more than 610 mm o.c.
• 2 layers of gypsum board on ceiling side
F58 with
F58a • no absorptive material in cavity — 50 27
• 15.9 mm Type X gypsum board
F58 with
F58b • absorptive material in cavity — 52 30
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 104 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F58 with
F58c • no absorptive material in cavity — 48 27
• 12.7 mm Type X gypsum board
F58 with
F58d • absorptive material in cavity — 50 30
• 12.7 mm Type X gypsum board
F58 with
F58e • no absorptive material in cavity — 48 27
• 12.7 mm regular gypsum board
F58 with
F58f • absorptive material in cavity — 50 30
• 12.7 mm regular gypsum board
• 50 mm concrete
• 0.38 mm metal pan with a 16 mm rib
• on steel joists spaced not more than 610 mm o.c.
F59 • with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
Cold Formed Steel
610 mm o.c.
Floor Joists(27)
• 1 layer of gypsum board on ceiling side
F59 with
• no absorptive material in cavity
F59a — 57 35
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F59 with
• no absorptive material in cavity
F59b — 59 35
• resilient metal channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F59 with
• absorptive material in cavity
F59c — 64 43
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F59 with
• absorptive material in cavity
F59d — 66 43
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F59 with
• no absorptive material in cavity
F59e — 56 34
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F59 with
• no absorptive material in cavity
F59f — 56 34
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F59 with
• absorptive material in cavity
F59g — 63 42
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F59 with
• absorptive material in cavity
F59h — 65 42
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F59 with
• no absorptive material in cavity
F59i — 55 34
• resilient metal channels spaced 406 mm o.c.
Cold Formed Steel
• 12.7 mm regular gypsum board
Floor Joists(27)
F59 with
• no absorptive material in cavity
F59j — 57 34
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
F59 with
• absorptive material in cavity
F59k — 62 42
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F59 with
• absorptive material in cavity
F59l — 64 42
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• 50 mm concrete
• 0.46 mm metal pan with a 19 mm rib
• on steel joists spaced not more than 610 mm o.c.
F60 • with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 2 layers of gypsum board on ceiling side
Column 1 2 3 4 5 6
Page 106 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F60 with
• no absorptive material in cavity
F60a 1h 62 36
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum
F60 with
• no absorptive material in cavity
F60b 1h 64 36
• resilient metal channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F60 with
• absorptive material in cavity
F60c 1h 69 44
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F60 with
• absorptive material in cavity 45 min
F60d 71 44
• resilient metal channels spaced 610 mm o.c. [1 h](25)
• 15.9 mm Type X gypsum board
F60 with
• no absorptive material in cavity
F60e 1h 60 36
• resilient metal channels spaced 406 mm o.c.
Cold Formed Steel • 12.7 mm Type X gypsum board
Floor Joists(27) F60 with
• no absorptive material in cavity
F60f 1h 62 36
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F60 with
• absorptive material in cavity
F60g 1h 67 44
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F60 with
• absorptive material in cavity 45 min
F60h 69 44
• resilient metal channels spaced 610 mm o.c. [1 h](25)
• 12.7 mm Type X gypsum board
F60 with
• no absorptive material in cavity
F60i — 60 36
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F60 with
• no absorptive material in cavity
F60j — 62 36
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F60 with
• absorptive material in cavity
F60k — 67 44
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm regular gypsum board
F60 with
• absorptive material in cavity
F60l — 69 44
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm regular gypsum board
• 50 mm concrete
• 0.38 mm metal pan with a 16 mm rib
• on steel joists spaced not more than 610 mm o.c.
F61 • with or without absorptive material in cavity
• resilient metal channels spaced 406 mm or
610 mm o.c.
• 2 layers of gypsum board on ceiling side
F61 with
• no absorptive material in cavity
F61a 1h 62 32
• resilient metal channels spaced 406 mm o.c.
Cold Formed Steel • 15.9 mm Type X gypsum board
Floor Joists(27) F61 with
• steel joists spaced 406 mm o.c.
F61b • no absorptive material in cavity 1h 64 32
• resilient metal channels spaced 610 mm o.c
• 15.9 mm Type X gypsum board
F61 with
• steel joists spaced 610 mm o.c.
F61c • no absorptive material in cavity — 65 29
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F61 with
• absorptive material in cavity
F61d 1h 68 37
• resilient metal channels spaced 406 mm o.c.
• 15.9 mm Type X gypsum board
F61 with
• steel joists spaced 406 mm o.c.
F61e • absorptive material in cavity 1h 66 34
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
Page 108 • SB-3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Floors and Ceilings
F61 with
• steel joists spaced 610 mm o.c.
F61f • absorptive material in cavity — 71 34
• resilient metal channels spaced 610 mm o.c.
• 15.9 mm Type X gypsum board
F61 with
• no absorptive material in cavity
F61g 1h 62 32
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F61 with
• steel joists spaced 406 mm o.c.
F61h • no absorptive material in cavity 1h 64 32
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F61 with
• steel joists spaced 610 mm o.c.
Cold Formed Steel
F61i • no absorptive material in cavity — 64 28
Floor Joists(27)
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F61 with
• absorptive material in cavity
F61j 1h 68 36
• resilient metal channels spaced 406 mm o.c.
• 12.7 mm Type X gypsum board
F61 with
• steel joists spaced 406 mm o.c.
F61k • absorptive material in cavity 1h 64 32
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
F61 with
• steel joists spaced 610 mm o.c.
F61l • no absorptive material in cavity — 70 34
• resilient metal channels spaced 610 mm o.c.
• 12.7 mm Type X gypsum board
Column 1 2 3 4 5 6
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Table 2 (Cont'd)
Fire and Sound Resistance of Floors, Ceilings and Roofs(1)
Typical Sound Typical Impact
Fire-
Assembly Transmission Insulation
Type of Assembly Description(2)(3)(4) Resistance
Number Class(5)(6)(7)(9)(10)(11) Class(5)(9)(12)
Rating (5)(6)(7)(8)
(STC) (IIC)
Roofs
• wood roof trusses spaced not more than
Wood Roof Trusses R1 610 mm o.c. 45 min — —
• 1 layer 15.9 mm Type X gypsum board
Roofs - Rating Provided by Membrane Only
• supporting members spaced not more than
M1 610 mm o.c. 30 min — —
• 1 layer 15.9 mm Type X gypsum board
• supporting members spaced not more than
M2 610 mm o.c. 1h — —
• 2 layers 15.9 mm Type X gypsum board
Column 1 2 3 4 5 6
Notes to Table 2:
(1) Reserved.
(2) For assemblies with a ceiling consisting of a single layer of gypsum board on resilient metal channels to obtain the listed ratings, the
resilient metal channel arrangement at the gypsum board butt end joints should be as shown in Figure 1.
(3) For assemblies with a ceiling consisting of 2 layers of gypsum board on resilient metal channels to obtain the listed ratings, the
fastener and resilient metal channel arrangement at the gypsum board butt end joints should be as shown in Figure 2.
(4) The fire-resistance rating and sound transmission class values given are for a minimum thickness of subfloor or deck as shown.
Minimum subfloor thickness required is determined by structural member spacing (see Table 9.23.15.5.A. of Division B of the Building
Code). Thicker subflooring or decking is also acceptable.
(5) Sound absorptive material includes
(i) fibre processed from rock, slag or glass, and
(ii) loose-fill or spray-applied cellulose fibre.
To obtain the listed sound transmission class rating, the nominal insulation thickness is 150 mm for rock, slag, or glass fibres or loose-
fill cellulose fibre, and 90 mm for spray-applied cellulose fibre, unless otherwise specified. Absorptive material will affect the sound
transmission class by approximately adding or subtracting 1 per 50 mm change of thickness. However, no additional sound
transmission class value is achieved by adding a greater thickness of insulation than the depth of the assembly.
(6) The fire-resistance rating and sound transmission class values are based on the spacing of ceiling supports as noted. [See also
Table Note (10)]. A narrower spacing will be detrimental to the sound transmission class rating, but not to the fire-resistance rating.
(7) To obtain the listed rating, fastener type, spacing and penetration depth for the attachment of gypsum board must conform to
Subsection 9.29.5. of Division B of the Building Code, and
(i) fastener distance to board edges and butt ends shall be no less than 38 mm, except for fasteners on the butt ends of the base
layer in ceilings with two layers (see Figure 2),
(ii) fasteners are spaced not more than 305 mm o.c.,
(iii) fasteners must consist of nails or screws when attaching gypsum board to wood members, and
(iv) fasteners must consist of screws when attaching gypsum board to cold-formed steel channels or resilient metal channels.
For wood- and steel-framed assemblies, if fasteners are spaced less than 300 mm o.c., subtract 1 from the sound transmission class
value; if fasteners are spaced less than 200 mm o.c., subtract 2 from the sound transmission class value. Narrower fastener spacing
is not detrimental to the fire-resistance rating.
Page 110 • SB-3
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2024MMAH Supplementary Standard SB-3
(8) See Sentence 1.2.1.(2) in MMAH Supplementary Standard SB-2, “Fire Performance Ratings” for the significance of fire-resistance
ratings.
(9) The sound transmission class values given in the Table are for the minimum depth of structural member noted in the description and
applicable Table notes. To obtain sound transmission class values for structural members deeper than that minimum, add 1 to the
sound transmission class value in the Table for each 170 mm increase in structural member depth.
(10) The sound transmission class values given in the Table are for structural member spacing of 305 mm o.c., unless otherwise noted in
the description and applicable Table notes. To obtain sound transmission class values for assemblies with structural members
spaced more than 500 mm o.c., add 1 to the sound transmission class value in the Table.
(11) Assemblies with sound transmission class ratings of 50 or more require methods to minimize airborne sound transmission at electrical
boxes and other openings, and at wall/wall and wall/floor junctions, except at junctions constructed of concrete-to-concrete, concrete-
to-masonry, or masonry-to-masonry where the intersecting joint along the junction is cast or mortared.
(12) The impact insulation class values given are for floor assemblies tested with no finished flooring.
(13) Wood floor joists are:
(i) wood joists with a minimum member size of 38 mm (width) x 235 mm (depth), except as otherwise noted [See Table Note (16)],
or
(ii) wood I-joists with a minimum flange size of 38 mm x 38 mm, a minimum OSB or plywood web thickness of 9.5 mm, and a
minimum joist depth of 241 mm.
(14) Except where assemblies with wood I-joists are tested according to CAN/ULC-S101-14, "Fire Endurance Tests of Building
Construction and Materials”, the fire-resistance rating values apply only to I-joists that have been fabricated with a phenolic-based
structural wood adhesive complying with CSA O112.10-08, “Evaluation of Adhesives for Structural Wood Products (Limited Moisture
Exposure)”. For I-joists with flanges made of laminated veneer lumber (LVL), the fire-resistance rating values apply only where the
adhesive used in the LVL fabrication is a phenolic-based structural wood adhesive complying with CSA O112.9-10, "Evaluation of
Adhesives for Structural Wood Products (Exterior Exposure)”.
(15) The fire-resistance rating value within square brackets is achieved only where absorptive material includes spray-applied cellulose
fibre with
(i) adhesive that is capable of providing a minimum cohesive/adhesive bond strength per unit area of 5 times the weight of the
material under the test plate when tested in accordance with ASTM E736/E736M-17, “Cohesion/Adhesion of Sprayed Fire-
Resistive Materials Applied to Structural Members”,
(ii) a minimum density of 35 kg/m3, and
(iii) a minimum thickness of 90 mm on the underside of the subfloor or deck, of 90 mm on the sides of the structural members, and
for cold-formed steel joists, of 13 mm on the underside of the bottom flange other than at resilient metal channel locations.
(16) The fire-resistance rating value within square brackets only applies to assemblies with solid wood joists and is achieved only where
absorptive material includes:
(i) fibre processed from rock or slag with a minimum thickness of 90 mm and a minimum surface area mass of 2.8 kg/m 2, or
(ii) spray-applied cellulose fibre with a minimum density of 50 kg/m3 and a minimum depth of 90 mm on the underside of the
subfloor and of 90 mm on the sides of the floor joists.
(17) The fire-resistance rating, sound transmission class and impact insulation class values given are also applicable to assemblies with
38 mm (width) x 184 mm (depth) solid wood joists.
(18) The fire-resistance rating value within square brackets is achieved only where absorptive material includes:
(i) fibre processed from rock or slag with a minimum thickness of 90 mm and a minimum surface area mass of 2.8 kg/m 2, or
(ii) spray-applied cellulose fibre with a minimum density of 50 kg/m3 and a minimum depth of 90 mm on the underside of the
subfloor and of 90 mm on the webs or the sides of the structural members.
(19) The fire-resistance rating, sound transmission class and impact insulation class values within the square brackets only apply to
assemblies with solid wood joists and are achieved only where absorptive material includes dry-blown cellulose fibre with a minimum
density of 40 kg/m3 filling the entire cavity; the cellulose fibre is supported on zinc-coated (galvanized) steel poultry fence fabric
conforming to ASTM A390-06, “Zinc-Coated (Galvanized) Steel Poultry Fence Fabric (Hexagonal and Straight Line)” which has
25 mm wide hexagonal mesh openings and 0.81 mm thick (20-gauge) wire and is attached to wood joists with metal staples having
legs that are 50 mm long.
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
(20) The fire-resistance rating and sound transmission class values are achieved only where absorptive material includes:
(i) fibre processed from rock or slag that fills the joist cavity and has a minimum surface area mass of 2.8 kg/m 2, and for structural
members at least 270 mm in depth, the fibre includes three layers each of which has a minimum thickness of 90 mm, or
(ii) dry-blown cellulose fibre with a minimum density of 40 kg/m3 filling the entire cavity; the cellulose fibre is supported on zinc-
coated (galvanized) steel poultry fence fabric conforming to ASTM A390-06, “Zinc-Coated (Galvanized) Steel Poultry Fence
Fabric (Hexagonal and Straight Line)” which has 25 mm wide hexagonal mesh openings and 0.81 mm thick (20-gauge) wire
and is attached to wood joists or wood I-joists with metal staples having legs that are 50 mm or 30 mm long, respectively.
(21) The fire-resistance rating value only applies to assemblies with wood l-joists with flanges with a minimum thickness of 38 mm and a
minimum width of 63 mm.
(22) The fire-resistance rating and sound transmission class values are achieved only where absorptive material includes:
(i) fibre processed from rock or slag that fills the joist cavity and has a minimum surface area mass of 2.8 kg/m2, and for structural
members at least 270 mm in depth, the fibre includes three layers each of which has a minimum thickness of 90 mm, or
(ii) dry-blown cellulose fibre with a minimum density of 40 kg/m3 filling the entire cavity; the cellulose fibre is supported on
zinc-coated (galvanized) steel poultry fence fabric conforming to ASTM A390-06, “Zinc-Coated (Galvanized) Steel Poultry
Fence Fabric (Hexagonal and Straight Line)” which has 25 mm wide hexagonal mesh openings and 0.81 mm thick (20-gauge)
wire and is attached to wood joists with metal staples having legs that are 50 mm long.
(23) The fire-resistance rating values given only apply to assemblies with solid wood joists spaced not more than 406 mm o.c. No
information is available for assemblies constructed with wood I-joists.
(24) Wood floor trusses are:
(i) metal plate-connected wood trusses with wood framing members not less than 38 mmx 64 mm, metal connector plates not less
than 1 mm (nominal) thick with teeth not less than 8 mm long, and a minimum truss depth of 305 mm,
(ii) metal web wood trusses with wood chords not less than 38 mm x 64 mm, V-shaped webs made from galvanized steel of
1 mm (nominal) thickness with plate areas having teeth not less than 8 mm long, and a minimum truss depth of 286 mm, or
(iii) fingerjoined wood trusses with glued fingerjoined connections, chord members not less than 38 mm x 64 mm, web members
not less than 38 mm x 38 mm and a minimum truss depth of 330 mm, all of which is glued together with an R-14 phenol-
resorcinol resin conforming to CSA O112.10-08, "Evaluation of Adhesives for Structural Wood Products (Limited Moisture
Exposure)”.
(25) The fire-resistance rating value within square brackets is achieved only where absorptive material includes fibre processed from rock
or slag with a minimum thickness of 90 mm and a minimum surface area mass of 2.8 kg/m2.
(26) The fire-resistance rating and sound transmission class values within square brackets are achieved only where absorptive material
includes dry-blown cellulose fibre with a minimum density of 40 kg/m3 filling the entire cavity; the cellulose fibre is supported on zinc-
coated (galvanized) steel poultry fence fabric conforming to ASTM A390-06, “Zinc-Coated (Galvanized) Steel Poultry Fence Fabric
(Hexagonal and Straight Line)” which has 25 mm wide hexagonal mesh openings and 0.81 mm thick (20-gauge) wire and is attached
to wood trusses with metal staples having legs that are 38 mm long.
(27) Cold-formed steel floor joists (C-shaped joists) are members with a minimum size of 41 mm (width) x 203 mm (depth) x 1.22 mm
(material thickness).
(28) The fire-resistance rating value within square brackets is achieved only where absorptive material includes spray-applied cellulose
fibre with a minimum density of 50 kg/m3 and a minimum thickness of 90 mm on the underside of the subfloor, of 90 mm on the sides
of the cold-formed steel floor joists, and of 13 mm on the underside of the bottom flange other than at resilient metal channel
locations.
Page 112 • SB-3
2024MMAH Supplementary Standard SB-3
Figures 1 to 7
Figure 1
Butt Joint Detail of Single Gypsum Board Layer Application
Notes to Figure 1:
(1) Figure is for illustration purposes only and is not to scale.
(2) The structural member can be any one of the types described in the Table.
(3) Adjacent gypsum board butt ends are to be attached to separate resilient channels using regular Type S screws, located a minimum of
38 mm from the butt end.
Figure 2
Butt Joint Detail of Double Gypsum Board Layer Application
Notes to Figure 2:
(1) Figure is for illustration purposes only and is not to scale.
(2) The structural member can be any one of the types described in the Table.
(3) Base layer butt ends can be attached to a single resilient channel using regular Type S screws.
(4) Type G screws measuring a minimum of 32 mm in length and located a minimum of 38 mm from the butt end are to be used to fasten
the butt ends of the face layer to the base layer.
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMAH Supplementary Standard SB-3
Figure 3
Example of Steel Furring Channel
Notes to Figure 3:
(1) Figure is for illustration purposes only and is not to scale.
Figure 4
Example of Resilient Metal Channel
Notes to Figure 4:
(1) Figure is for illustration purposes only and is not to scale.
Page 114 • SB-3
2024MMAH Supplementary Standard SB-3
Figure 5
Blocking for Lightweight Wood-Frame Walls With a Single or Double Row of Studs
Notes to Figure 5:
(1) Figure is for illustrative purposes only and is not to scale.
Figure 6
Vertical Application of Exterior Wall Sheathing or Interior Wall Finish With All Joints
Backed With Lumber Having the Same Dimensions as the Framing Members
Notes to Figure 6:
(1) Figure is for illustration purposes only and is not to scale.
2024MMAH Supplementary Standard SB-3
Figure 7
Horizontal Application of Exterior Wall Sheathing or Interior Wall Finish With All Joints
Backed With Lumber Having the Same Dimensions as the Framing Members
Notes to Figure 7:
(1) Figure is for illustration purposes only and is not to scale.
Page 116 • SB-3
Ministry of Municipal Affairs and Housing
Building and Development Branch
MMAH Supplementary Standard SB-4
MMAH Supplementary Standard SB-4
Measures for Fire Safety in
High Buildings
January 1, 2024
2024MMAH Supplementary Standard SB-4
COMMENCEMENT
MMAH Supplementary Standard SB-4 comes into force on the 1st day of January 2025.
© Copyright
©
Copyright King's Printer for Ontario 2024
All rights reserved.
Questions regarding copyright, including reproduction and distribution, may be directed to the Director,
Building and Development Branch of the Ministry of Municipal Affairs and Housing.
2024MMAH Supplementary Standard SB-4
CONTENTS
Page
Introduction ............................................................................................................................................... 1
Section 1: Building Code Provisions ...................................................................................................... 2
Section 2: Scope of Measures for Fire Safety in Existing High Buildings .......................................... 12
Section 3: Measures for Life Safety in Existing High Buildings .......................................................... 30
Appendix A to SB-4: Graphs for Applying Smoke Control Measures ................................................. 53
Appendix B to SB-4: Assumptions Used in Developing Fire Safety Measures.................................. 59
Appendix C to SB-4: Check of a Smoke Control System ..................................................................... 69
References ................................................................................................................................................. 70
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