Section 9.41 — Additional Requirements for

(1) This Section applies where proposed construction in respect of an existing building will result in any of the following changes of use of all or part of the building: (a) a change of the major occupancy of all or part of a building that is designated with a “Y” in Table 1.3.1.4. of Division C, (b) a suite of a Group C major occupancy is converted into more than one suite of a Group C major occupancy, (c) a farm building or part of a farm building is changed to another major occupancy other than a Group G major occupancy, (d) a building or part of a building is changed to a post-disaster building, (e) the use of a building or part of a building is changed and the previous major occupancy of the building or part of the building cannot be determined, or (f) a farm building or part of a farm building is changed to a Group G, Division 1 major occupancy. (2) For the purposes of this Section and Sentences 11.4.2.1.(1) and 11.4.2.5.(4), the changes of use set out in Clauses (1)(b) to (f) are also deemed to constitute a change in major occupancy. (3) The requirements of this Section are in addition to the requirements of other Parts of the Code as they apply to the proposed construction.

(1) Where proposed construction will result in a change of use described in Clauses 9.40.1.1.(1)(a) to (f), additional construction shall be required in order that the building or part of a building subject to the change of use conforms to the requirements of Subsections 9.5.1. and 9.5.3. to 9.5.10., Section 9.6., Article 9.7.2.3. Sentences 9.7.5.1.(2) and 9.7.6.2.(1) and (3), Articles 9.8.8.1. and 9.9.10.1., Subsection 9.10.17. and Sections 9.31., 9.32. and 9.34. as they apply to the new major occupancy that the building or part of a building is to support. (2) For the purposes of this Article, existing buildings shall be classified as to their construction and occupancy as provided for in Sentence 11.2.1.1.(1).

(1) The performance level of a building after construction shall not be less than the performance level of the building prior to construction. (2) For the purposes of Sentence (1), reduction of performance level shall be determined in accordance with Articles 11.4.2.1., 11.4.2.3. and 11.4.2.5. (3) Where the proposed construction would reduce the performance level of an existing building, compensating construction shall be required in conformance with Articles 11.4.3.1., 11.4.3.2., 11.4.3.4. and 11.4.3.6. (4) Section 11.5. applies in respect of the requirements of Sentences 11.4.3.4.(1), (3) and (4). Table 9.20.17.4.-A Maximum Allowable Clear Spans for Lintels in Flat Loadbearing Insulating Concrete Form (ICF) Walls (1)(2)(3) (1-10M Bottom Bar) Forming Part of Sentences 9.3.2.8.(1) and 9.20.17.4.(3) Maximum Clear Span, m Supporting ICF Second Storey and Minimum Lintel Minimum Lintel Depth, Supporting Light-Frame Roof Only Light-Frame Roof Thickness, mm mm Maximum Ground Snow Load, kN/m2 1.50 3.33 1.50 3.33 200 1.41 1.18 1.03 0.93 300 1.78 1.50 1.30 1.18 140 400 2.08 1.75 1.53 1.38 500 2.33 1.97 1.72 1.56 600 2.55 2.16 1.89 1.71 200 1.41 1.18 1.02 0.92 300 1.78 1.50 1.29 1.17 150 400 2.08 1.75 1.51 1.37 500 2.33 1.97 1.70 1.54 600 2.54 2.15 1.87 1.70 200 1.41 1.18 1.01 0.91 300 1.78 1.50 1.28 1.16 160 400 2.07 1.75 1.50 1.36 500 2.32 1.96 1.68 1.53 600 2.53 2.15 1.85 1.68 200 1.41 1.19 0.98 0.89 300 1.78 1.50 1.24 1.13 190 400 2.06 1.74 1.45 1.32 500 2.30 1.95 1.63 1.49 600 2.51 2.13 1.78 1.63 200 1.41 1.19 0.97 0.89 300 1.77 1.49 1.23 1.12 200 400 2.06 1.74 1.43 1.31 500 2.30 1.95 1.61 1.48 600 2.50 2.13 1.77 1.62 200 1.41 1.19 0.94 0.86 300 1.76 1.49 1.18 1.09 240 400 2.04 1.73 1.38 1.27 500 2.27 1.93 1.55 1.43 600 2.47 2.11 1.70 1.56 Notes to Table 9.20.17.4.-A: (1) Deflection criteria is L/240, where “L” is the clear span of the lintel. (2) Linear interpolation is permitted between ground snow loads and between lintel depths. (3) 10M stirrups are required at a maximum d/2 spacing for spans greater than 1 200 mm, where “d” is the distance from the top of the lintel to the level of the bottom reinforcing bar in the lintel. Table 9.20.17.4.-B Maximum Allowable Clear Spans for Lintels in Flat Loadbearing Insulating Concrete Form (ICF) Walls (1)(2)(3) (1-15M Bottom Bar) Forming Part of Sentences 9.3.2.8.(1) and 9.20.17.4.(3) Maximum Clear Span, m Supporting ICF Second Storey and Minimum Lintel Minimum Lintel Depth, Supporting Light-Frame Roof Only Light-Frame Roof Thickness, mm mm Maximum Ground Snow Load, kN/m2 1.50 3.33 1.50 3.33 200 1.63 1.46 1.31 1.23 300 2.43 2.08 1.81 1.64 140 400 2.90 2.44 2.13 1.93 500 3.26 2.75 2.41 2.18 600 3.58 3.03 2.65 2.40 200 1.67 1.49 1.33 1.25 300 2.48 2.08 1.79 1.62 150 400 2.90 2.44 2.11 1.91 500 3.26 2.75 2.38 2.16 600 3.57 3.02 2.62 2.38 200 1.70 1.53 1.35 1.26 300 2.48 2.08 1.78 1.61 160 400 2.90 2.44 2.09 1.90 500 3.25 2.75 2.36 2.14 600 3.56 3.02 2.59 2.36 200 1.80 1.61 1.36 1.24 300 2.48 2.09 1.73 1.58 190 400 2.89 2.44 2.03 1.85 500 3.23 2.74 2.29 2.09 600 3.53 3.00 2.51 2.30 200 1.83 1.64 1.35 1.23 300 2.48 2.09 1.71 1.57 200 400 2.88 2.44 2.01 1.84 500 3.22 2.74 2.26 2.07 600 3.52 2.99 2.48 2.28 200 1.93 1.65 1.30 1.20 300 2.47 2.08 1.66 1.52 240 400 2.86 2.43 1.94 1.78 500 3.19 2.72 2.18 2.01 600 3.47 2.97 2.39 2.20 Notes to Table 9.20.17.4.-B: (1) Deflection criteria is L/240, where “L” is the clear span of the lintel. (2) Linear interpolation is permitted between ground snow loads and between lintel depths. (3) 10M stirrups are required at a maximum d/2 spacing for spans greater than 1 200 mm, where “d” is the distance from the top of the lintel to the level of the bottom reinforcing bar in the lintel. Table 9.20.17.4.-C Maximum Allowable Clear Spans for Lintels in Flat Loadbearing Insulating Concrete Form (ICF) Walls (1)(2)(3) (2-15M Bottom Bar) Forming Part of Sentences 9.3.2.8.(1) and 9.20.17.4.(3) Maximum Clear Span, m Supporting ICF Second Storey and Minimum Lintel Minimum Lintel Depth, Supporting Light-Frame Roof Only Light-Frame Roof Thickness, mm mm Maximum Ground Snow Load, kN/m2 1.50 3.33 1.50 3.33 200 1.63 1.46 1.31 1.23 300 2.43 2.18 1.96 1.84 140 400 3.22 2.90 2.60 2.42 500 4.00 3.60 3.25 2.70 600 4.71 4.20 3.61 2.97 200 1.67 1.49 1.33 1.25 300 2.48 2.23 1.99 1.87 150 400 3.29 2.96 2.64 2.45 500 4.80 3.68 3.29 2.74 600 4.87 4.20 3.64 3.02 200 1.70 1.53 1.35 1.27 300 2.53 2.28 2.02 1.90 160 400 3.36 3.02 2.68 2.48 500 4.16 3.76 3.27 2.78 600 4.95 4.20 3.61 3.08 200 1.80 1.61 1.39 1.32 300 2.67 2.40 2.09 1.97 190 400 3.53 3.19 2.77 2.56 500 4.38 3.81 3.18 2.90 600 4.92 4.19 3.50 3.21 200 1.83 1.64 1.41 1.33 300 2.87 2.44 2.11 2.00 200 400 3.78 3.24 2.79 2.55 500 4.46 3.81 3.15 2.89 600 4.86 4.18 3.47 3.18 200 2.07 1.74 1.46 1.38 300 3.07 2.59 2.18 2.07 240 400 3.95 3.38 2.70 2.48 500 4.40 3.80 3.04 2.80 600 4.78 4.16 3.34 3.08 Notes to Table 9.20.17.4.-C: (1) Deflection criteria is L/240, where “L” is the clear span of the lintel. (2) Linear interpolation is permitted between ground snow loads and between lintel depths. (3) 10M stirrups are required at a maximum d/2 spacing for spans greater than 1 200 mm, where “d” is the distance from the top of the lintel to the level of the bottom reinforcing bar in the lintel. Table 9.23.4.2.-A Maximum Spans for Floor Joists – General Cases(1) Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(1) and (2), 9.23.4.4.(1) and 9.23.9.4.(1) to (3) Maximum Span, m With Strapping(2) and Joist Size, With Strapping(2) With Bridging Commercial Designation Grade Bridging mm Joist Spacing, mm Joist Spacing, mm Joist Spacing, mm 300 400 600 300 400 600 300 400 600 38 × 89 2.13 1.97 1.73 2.19 1.99 1.73 2.19 1.99 1.73 38 × 140 3.23 3.07 2.73 3.44 3.12 2.73 3.44 3.12 2.73 Select 38 × 184 3.88 3.69 3.51 4.18 3.92 3.59 4.37 4.07 3.59 Structural 38 × 235 4.57 4.34 4.13 4.86 4.57 4.29 5.05 4.70 4.39 38 × 286 5.21 4.95 4.71 5.49 5.16 4.85 5.66 5.28 4.92 38 × 89 2.00 1.85 1.66 2.09 1.90 1.66 2.09 1.90 1.66 38 × 140 3.09 2.91 2.62 3.29 2.99 2.62 3.29 2.99 2.62 Douglas Fir – Larch No. 1 and No. 2 38 × 184 3.71 3.53 3.36 4.00 3.76 3.44 4.19 3.90 3.44 (includes Douglas Fir and 38 × 235 4.38 4.16 3.96 4.66 4.38 4.11 4.84 4.51 4.20 Western Larch) 38 × 286 4.99 4.75 4.52 5.26 4.94 4.65 5.43 5.06 4.72 38 × 89 1.90 1.69 1.38 1.95 1.69 1.38 1.95 1.69 1.38 38 × 140 2.78 2.41 1.97 2.78 2.41 1.97 2.78 2.41 1.97 No. 3 38 × 184 3.38 2.93 2.39 3.38 2.93 2.39 3.38 2.93 2.39 38 × 235 4.14 3.58 2.93 4.14 3.58 2.93 4.14 3.58 2.93 38 × 286 4.80 4.16 3.39 4.80 4.16 3.39 4.80 4.16 3.39 Construction 38 × 89 1.90 1.77 1.61 2.03 1.84 1.61 2.03 1.84 1.61 Standard 38 × 89 1.81 1.63 1.33 1.88 1.63 1.33 1.88 1.63 1.33 38 × 89 2.08 1.93 1.71 2.16 1.96 1.71 2.16 1.96 1.71 38 × 140 3.18 3.03 2.69 3.39 3.08 2.69 3.39 3.08 2.69 Select 38 × 184 3.82 3.64 3.46 4.12 3.87 3.54 4.31 4.02 3.54 Structural 38 × 235 4.50 4.28 4.08 4.80 4.51 4.23 4.98 4.64 4.33 38 × 286 5.14 4.89 4.65 5.42 5.09 4.78 5.59 5.21 4.86 38 × 89 2.00 1.85 1.66 2.09 1.90 1.66 2.09 1.90 1.66 38 × 140 3.09 2.91 2.62 3.29 2.99 2.62 3.29 2.99 2.62 Hem – Fir No. 1 and No. 2 38 × 184 3.71 3.53 3.36 4.00 3.76 3.44 4.19 3.90 3.44 (includes Western Hemlock and 38 × 235 4.38 4.16 3.96 4.66 4.38 4.11 4.84 4.51 4.20 Amabilis Fir) 38 × 286 4.99 4.75 4.52 5.26 4.94 4.65 5.43 5.06 4.72 38 × 89 1.90 1.77 1.61 2.03 1.84 1.61 2.03 1.84 1.61 38 × 140 2.99 2.78 2.43 3.19 2.90 2.43 3.19 2.90 2.43 No. 3 38 × 184 3.60 3.42 2.95 3.88 3.61 2.95 4.06 3.61 2.95 38 × 235 4.24 4.03 3.61 4.51 4.24 3.61 4.68 4.37 3.61 38 × 286 4.84 4.60 4.19 5.10 4.79 4.19 5.26 4.90 4.19 Construction 38 × 89 1.90 1.77 1.61 2.03 1.84 1.61 2.03 1.84 1.61 Standard 38 × 89 1.81 1.68 1.39 1.96 1.71 1.39 1.96 1.71 1.39 Table 9.23.4.2.-A (Cont'd) Maximum Spans for Floor Joists – General Cases(1) Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(1) and (2), 9.23.4.4.(1) and 9.23.9.4.(1) to (3) Maximum Span, m With Strapping(2) and Joist Size, With Strapping(2) With Bridging Commercial Designation Grade Bridging mm Joist Spacing, mm Joist Spacing, mm Joist Spacing, mm 300 400 600 300 400 600 300 400 600 38 × 89 1.95 1.81 1.64 2.06 1.87 1.64 2.06 1.87 1.64 38 × 140 3.05 2.85 2.57 3.24 2.95 2.57 3.24 2.95 2.57 Select 38 × 184 3.66 3.48 3.31 3.94 3.70 3.38 4.12 3.84 3.38 Structural 38 × 235 4.31 4.10 3.90 4.59 4.31 4.05 4.76 4.44 4.14 38 × 286 4.91 4.67 4.45 5.18 4.87 4.57 5.34 4.98 4.64 38 × 89 1.86 1.72 1.58 1.99 1.81 1.58 1.99 1.81 1.58 38 × 140 2.92 2.71 2.49 3.14 2.85 2.49 3.14 2.85 2.49 Spruce – Pine – Fir (includes Spruce (all species No. 1 and No. 2 38 × 184 3.54 3.36 3.20 3.81 3.58 3.27 3.99 3.72 3.27 except Coast Sitka Spruce), 38 × 235 4.17 3.96 3.77 4.44 4.17 3.92 4.60 4.29 4.00 Jack Pine, Lodgepole Pine, 38 × 286 4.75 4.52 4.30 5.01 4.71 4.42 5.17 4.82 4.49 Balsam Fir and Alpine Fir) 38 × 89 1.81 1.68 1.55 1.96 1.78 1.55 1.96 1.78 1.55 38 × 140 2.84 2.64 2.43 3.08 2.80 2.43 3.08 2.80 2.43 No. 3 38 × 184 3.47 3.30 2.95 3.74 3.52 2.95 3.92 3.61 2.95 38 × 235 4.09 3.89 3.61 4.36 4.09 3.61 4.52 4.22 3.61 38 × 286 4.67 4.44 4.19 4.92 4.62 4.19 5.08 4.73 4.19 Construction 38 × 89 1.81 1.68 1.55 1.96 1.78 1.55 1.96 1.78 1.55 Standard 38 × 89 1.70 1.58 1.44 1.88 1.71 1.44 1.88 1.71 1.44 38 × 89 1.65 1.53 1.42 1.84 1.68 1.46 1.84 1.68 1.46 38 × 140 2.59 2.41 2.24 2.90 2.63 2.30 2.90 2.63 2.30 Select 38 × 184 3.27 3.11 2.94 3.52 3.31 3.03 3.69 3.44 3.03 Structural 38 × 235 3.85 3.66 3.48 4.10 3.85 3.62 4.26 3.97 3.70 38 × 286 4.39 4.18 3.97 4.63 4.35 4.09 4.78 4.45 4.15 38 × 89 1.59 1.48 1.37 1.80 1.64 1.43 1.80 1.64 1.43 38 × 140 2.51 2.33 2.16 2.83 2.57 2.25 2.83 2.57 2.25 Northern Species No. 1 and No. 2 38 × 184 3.19 3.04 2.84 3.44 3.23 2.96 3.60 3.36 2.96 (includes any Canadian Species 38 × 235 3.76 3.58 3.41 4.01 3.77 3.54 4.16 3.88 3.62 covered by the NLGA Standard Grading Rules) 38 × 286 4.29 4.08 3.88 4.53 4.25 4.00 4.67 4.35 4.06 38 × 89 1.54 1.43 1.32 1.74 1.57 1.36 1.76 1.60 1.36 38 × 140 2.42 2.24 1.94 2.74 2.38 1.94 2.75 2.38 1.94 No. 3 38 × 184 3.12 2.90 2.37 3.35 2.90 2.37 3.35 2.90 2.37 38 × 235 3.67 3.49 2.89 3.91 3.54 2.89 4.06 3.54 2.89 38 × 286 4.19 3.98 3.36 4.42 4.11 3.36 4.55 4.11 3.36 Construction 38 × 89 1.54 1.43 1.32 1.74 1.57 1.40 1.76 1.60 1.40 Standard 38 × 89 1.48 1.37 1.15 1.63 1.41 1.15 1.63 1.41 1.15 Notes to Table 9.23.4.2.-A: (1) Spans apply only where the floors serve residential areas as described in Table 4.1.5.3., or the uniformly distributed live load on the floor does not exceed that specified for residential areas as described in Table 4.1.5.3. (2) See Sentence 9.23.9.4.(5) for alternatives to strapping. Table 9.23.4.2.-B Maximum Spans for Floor Joists – Special Cases(1) Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(1) and (2), 9.23.4.4.(2) and 9.23.9.4.(4) and (6) Maximum Span, m Joists with Concrete Joists with Ceilings Attached to Wood Furring Joist Size, Topping Commercial Designation Grade mm Without Bridging With Bridging With or Without Bridging(2) Joist Spacing, mm Joist Spacing, mm Joist Spacing, mm 300 400 600 300 400 600 300 400 600 38 × 89 2.19 1.99 1.73 2.19 1.99 1.73 2.19 1.99 1.73 38 × 140 3.44 3.12 2.73 3.44 3.12 2.73 3.44 3.12 2.73 Select 38 × 184 4.24 3.99 3.59 4.52 4.11 3.59 4.52 4.11 3.59 Structural 38 × 235 4.98 4.69 4.29 5.47 5.20 4.58 5.77 5.24 4.58 38 × 286 5.67 5.34 4.88 6.19 5.89 5.54 6.83 6.37 5.58 38 × 89 2.09 1.90 1.66 2.09 1.90 1.66 2.09 1.90 1.66 38 × 140 3.29 2.99 2.62 3.29 2.99 2.62 3.29 2.99 2.55 No. 1 and Douglas Fir – Larch 38 × 184 4.06 3.83 3.44 4.33 3.93 3.44 4.33 3.81 3.11 No. 2 (includes Douglas Fir and 38 × 235 4.78 4.50 4.11 5.24 4.98 4.31 5.37 4.65 3.80 Western Larch) 38 × 286 5.44 5.12 4.68 5.93 5.64 5.00 6.24 5.40 4.41 38 × 89 1.95 1.69 1.38 1.95 1.69 1.38 1.72 1.49 1.21 38 × 140 2.78 2.41 1.97 2.78 2.41 1.97 2.45 2.12 1.73 No. 3 38 × 184 3.38 2.93 2.39 3.38 2.93 2.39 2.98 2.58 2.11 38 × 235 4.14 3.58 2.93 4.14 3.58 2.93 3.65 3.16 2.58 38 × 286 4.80 4.16 3.39 4.80 4.16 3.39 4.23 3.66 2.99 Construction 38 × 89 2.03 1.84 1.61 2.03 1.84 1.61 2.03 1.84 1.61 Standard 38 × 89 1.88 1.63 1.33 1.88 1.63 1.33 1.66 1.44 1.17 38 × 89 2.16 1.96 1.71 2.16 1.96 1.71 2.16 1.96 1.71 38 × 140 3.39 3.08 2.69 3.39 3.08 2.69 3.39 3.08 2.69 Select 38 × 184 4.18 3.94 3.54 4.46 4.05 3.54 4.46 4.05 3.54 Structural 38 × 235 4.92 4.63 4.23 5.39 5.13 4.52 5.69 5.17 4.52 38 × 286 5.60 5.27 4.82 6.10 5.81 5.47 6.74 6.28 5.50 38 × 89 2.09 1.90 1.66 2.09 1.90 1.66 2.09 1.90 1.66 38 × 140 3.29 2.99 2.62 3.29 2.99 2.62 3.29 2.99 2.62 No. 1 and Hem – Fir 38 × 184 4.06 3.83 3.44 4.33 3.93 3.44 4.33 3.93 3.26 No. 2 (includes Western Hemlock 38 × 235 4.78 4.50 4.11 5.24 4.98 4.39 5.53 4.88 3.99 and Amabilis Fir) 38 × 286 5.44 5.12 4.68 5.93 5.64 5.25 6.54 5.66 4.63 38 × 89 2.03 1.84 1.61 2.03 1.84 1.61 2.03 1.83 1.50 38 × 140 3.19 2.90 2.43 3.19 2.90 2.43 3.02 2.62 2.14 No. 3 38 × 184 3.94 3.61 2.95 4.17 3.61 2.95 3.68 3.18 2.60 38 × 235 4.63 4.36 3.61 5.08 4.42 3.61 4.50 3.89 3.18 38 × 286 5.27 4.96 4.19 5.74 5.13 4.19 5.22 4.52 3.69 Construction 38 × 89 2.03 1.84 1.61 2.03 1.84 1.61 2.03 1.84 1.61 Standard 38 × 89 1.96 1.71 1.39 1.96 1.71 1.39 1.74 1.50 1.23 Table 9.23.4.2.-B (Cont'd) Maximum Spans for Floor Joists – Special Cases(1) Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(1) and (2), 9.23.4.4.(2) and 9.23.9.4.(4) and (6) Maximum Span, m Joists with Concrete Joists with Ceilings Attached to Wood Furring Joist Size, Topping Commercial Designation Grade mm Without Bridging With Bridging With or Without Bridging(2) Joist Spacing, mm Joist Spacing, mm Joist Spacing, mm 300 400 600 300 400 600 300 400 600 38 × 89 2.06 1.87 1.64 2.06 1.87 1.64 2.06 1.87 1.64 38 × 140 3.24 2.95 2.57 3.24 2.95 2.57 3.24 2.95 2.57 Select 38 × 184 4.00 3.77 3.38 4.26 3.87 3.38 4.26 3.87 3.38 Structural 38 × 235 4.70 4.43 4.05 5.16 4.91 4.32 5.45 4.95 4.32 38 × 286 5.35 5.04 4.61 5.84 5.55 5.23 6.45 6.01 5.26 38 × 89 1.99 1.81 1.58 1.99 1.81 1.58 1.99 1.81 1.58 38 × 140 3.14 2.85 2.49 3.14 2.85 2.49 3.14 2.85 2.49 Spruce – Pine – Fir No. 1 and (includes Spruce (all species 38 × 184 3.87 3.64 3.27 4.12 3.75 3.27 4.12 3.75 3.27 No. 2 except Coast Sitka Spruce), 38 × 235 4.55 4.28 3.91 4.99 4.75 4.18 5.27 4.79 4.13 Jack Pine, Lodgepole Pine, 38 × 286 5.18 4.88 4.46 5.65 5.37 5.06 6.23 5.81 4.79 Balsam Fir and Alpine Fir) 38 × 89 1.96 1.78 1.55 1.96 1.78 1.55 1.96 1.78 1.50 38 × 140 3.08 2.80 2.43 3.08 2.80 2.43 3.02 2.62 2.14 No. 3 38 × 184 3.80 3.58 2.95 4.05 3.61 2.95 3.68 3.18 2.60 38 × 235 4.47 4.21 3.61 4.90 4.42 3.61 4.50 3.89 3.18 38 × 286 5.09 4.79 4.19 5.55 5.13 4.19 5.22 4.52 3.69 Construction 38 × 89 1.96 1.78 1.55 1.96 1.78 1.55 1.96 1.78 1.55 Standard 38 × 89 1.88 1.71 1.44 1.88 1.71 1.44 1.80 1.56 1.27 38 × 89 1.84 1.68 1.46 1.84 1.68 1.46 1.84 1.68 1.46 38 × 140 2.90 2.63 2.30 2.90 2.63 2.30 2.90 2.63 2.30 Select 38 × 184 3.58 3.37 3.03 3.81 3.46 3.03 3.81 3.46 3.03 Structural 38 × 235 4.20 3.96 3.62 4.61 4.39 3.86 4.87 4.42 3.86 38 × 286 4.79 4.51 4.12 5.22 4.96 4.68 5.76 5.37 4.54 38 × 89 1.80 1.64 1.43 1.80 1.64 1.43 1.80 1.64 1.43 38 × 140 2.83 2.57 2.25 2.83 2.57 2.25 2.83 2.57 2.23 Northern Species No. 1 and (includes any Canadian 38 × 184 3.50 3.29 2.96 3.72 3.38 2.96 3.72 3.32 2.71 No. 2 Species covered by the 38 × 235 4.11 3.87 3.54 4.51 4.29 3.76 4.69 4.06 3.31 NLGA Standard Grading 38 × 286 4.68 4.40 4.03 5.10 4.85 4.36 5.44 4.71 3.84 Rules) 38 × 89 1.76 1.60 1.36 1.76 1.60 1.36 1.70 1.47 1.20 38 × 140 2.75 2.38 1.94 2.75 2.38 1.94 2.42 2.10 1.71 No. 3 38 × 184 3.35 2.90 2.37 3.35 2.90 2.37 2.95 2.55 2.08 38 × 235 4.01 3.54 2.89 4.09 3.54 2.89 3.61 3.12 2.55 38 × 286 4.56 4.11 3.36 4.75 4.11 3.36 4.18 3.62 2.96 Construction 38 × 89 1.76 1.60 1.40 1.76 1.60 1.40 1.76 1.60 1.37 Standard 38 × 89 1.63 1.41 1.15 1.63 1.41 1.15 1.44 1.25 1.02 Notes to Table 9.23.4.2.-B: (1) Spans apply only where the floors serve residential areas as described in Table 4.1.5.3., or the uniformly distributed live load on the floor does not exceed that specified for residential areas as described in Table 4.1.5.3. (2) No bridging is assumed for spans for floor joists with concrete topping. Table 9.23.4.2.-C Maximum Spans for Ceiling Joists – Attic Not Accessible by a Stairway Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(1) and 9.23.14.10.(2) Maximum Span, m Commercial Designation Grade Joist Size, mm Joist Spacing, mm 300 400 600 38 × 89 3.41 3.10 2.71 38 × 140 5.37 4.88 4.26 Select Structural 38 × 184 7.05 6.41 5.60 38 × 235 9.01 8.18 7.15 38 × 286 10.96 9.96 8.70 38 × 89 3.27 2.97 2.59 38 × 140 5.14 4.67 4.08 Douglas Fir – Larch No. 1 and No. 2 38 × 184 6.76 6.14 5.36 (includes Douglas Fir and 38 × 235 8.63 7.84 6.85 Western Larch) 38 × 286 10.50 9.54 8.34 38 × 89 3.17 2.88 2.42 38 × 140 4.89 4.23 3.46 No. 3 38 × 184 5.95 5.15 4.20 38 × 235 7.27 6.30 5.14 38 × 286 8.44 7.31 5.97 Construction 38 × 89 3.17 2.88 2.51 Standard 38 × 89 3.06 2.78 2.34 38 × 89 3.36 3.06 2.67 38 × 140 5.29 4.81 4.20 Select Structural 38 × 184 6.96 6.32 5.52 38 × 235 8.88 8.07 7.05 38 × 286 10.81 9.82 8.58 38 × 89 3.27 2.97 2.59 38 × 140 5.14 4.67 4.08 Hem – Fir No. 1 and No. 2 38 × 184 6.76 6.14 5.36 (includes Western Hemlock and 38 × 235 8.63 7.84 6.85 Amabilis Fir) 38 × 286 10.50 9.54 8.34 38 × 89 3.17 2.88 2.51 38 × 140 4.98 4.53 3.95 No. 3 38 × 184 6.55 5.95 5.19 38 × 235 8.36 7.60 6.34 38 × 286 10.18 9.01 7.36 Construction 38 × 89 3.17 2.88 2.50 Standard 38 × 89 3.06 2.78 2.43 Table 9.23.4.2.-C (Cont'd) Maximum Spans for Ceiling Joists – Attic Not Accessible by a Stairway Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(1) and 9.23.14.10.(2) Maximum Span, m Commercial Designation Grade Joist Size, mm Joist Spacing, mm 300 400 600 38 × 89 3.22 2.92 2.55 38 × 140 5.06 4.60 4.02 Select Structural 38 × 184 6.65 6.05 5.28 38 × 235 8.50 7.72 6.74 38 × 286 10.34 9.40 8.21 38 × 89 3.11 2.83 2.47 38 × 140 4.90 4.45 3.89 Spruce – Pine – Fir (includes Spruce (all species No. 1 and No. 2 38 × 184 6.44 5.85 5.11 except Coast Sitka Spruce), 38 × 235 8.22 7.47 6.52 Jack Pine, Lodgepole Pine, 38 × 286 10.00 9.09 7.94 Balsam Fir and Alpine Fir) 38 × 89 3.06 2.78 2.43 38 × 140 4.81 4.37 3.82 No. 3 38 × 184 6.32 5.74 5.02 38 × 235 8.07 7.33 6.34 38 × 286 9.82 8.93 7.36 Construction 38 × 89 3.06 2.78 2.43 Standard 38 × 89 2.94 2.67 2.33 38 × 89 2.88 2.61 2.28 38 × 140 4.53 4.11 3.59 Select Structural 38 × 184 5.95 5.40 4.72 38 × 235 7.60 6.90 6.03 38 × 286 9.25 8.40 7.34 38 × 89 2.81 2.55 2.23 38 × 140 4.42 4.02 3.51 Northern Species No. 1 and No. 2 38 × 184 5.81 5.28 4.61 (includes any Canadian Species 38 × 235 7.42 6.74 5.89 covered by the NLGA Standard Grading Rules) 38 × 286 9.03 8.21 7.17 38 × 89 2.74 2.49 2.18 38 × 140 4.31 3.92 3.42 No. 3 38 × 184 5.67 5.09 4.16 38 × 235 7.19 6.23 5.08 38 × 286 8.34 7.23 5.90 Construction 38 × 89 2.74 2.49 2.18 Standard 38 × 89 2.67 2.43 2.03 Table 9.23.4.2.-D Maximum Spans for Roof Joists – Specified Roof Snow Loads 1.0 to 2.0 kPa Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(1), 9.23.4.5.(1) and 9.23.14.10.(2) Maximum Span, m Specified Snow Load, kPa Joist Size, Commercial Designation Grade 1.0 1.5 2.0 mm Joist Spacing, mm Joist Spacing, mm Joist Spacing, mm 300 400 600 300 400 600 300 400 600 38 × 89 2.71 2.46 2.15 2.37 2.15 1.88 2.15 1.95 1.71 38 × 140 4.26 3.87 3.38 3.72 3.38 2.95 3.38 3.07 2.68 Select 38 × 184 5.60 5.09 4.44 4.89 4.44 3.88 4.44 4.04 3.53 Structural 38 × 235 7.15 6.49 5.67 6.24 5.67 4.96 5.67 5.15 4.50 38 × 286 8.70 7.90 6.91 7.60 6.91 6.03 6.91 6.27 5.48 38 × 89 2.59 2.36 2.06 2.27 2.06 1.80 2.06 1.87 1.63 38 × 140 4.08 3.71 3.24 3.57 3.24 2.83 3.24 2.94 2.57 No. 1 and Douglas Fir – Larch 38 × 184 5.36 4.87 4.26 4.69 4.26 3.72 4.26 3.87 3.38 No. 2 (includes Douglas Fir and 38 × 235 6.85 6.22 5.44 5.98 5.44 4.74 5.44 4.94 4.22 Western Larch) 38 × 286 8.34 7.57 6.40 7.28 6.62 5.50 6.62 6.00 4.90 38 × 89 2.49 2.16 1.76 2.14 1.85 1.51 1.91 1.65 1.35 38 × 140 3.56 3.08 2.51 3.06 2.65 2.16 2.72 2.36 1.92 No. 3 38 × 184 4.33 3.75 3.06 3.72 3.22 2.63 3.31 2.87 2.34 38 × 235 5.29 4.58 3.74 4.55 3.94 3.22 4.05 3.51 2.86 38 × 286 6.14 5.32 4.34 5.28 4.57 3.73 4.70 4.07 3.32 Construction 38 × 89 2.51 2.28 1.99 2.20 1.99 1.74 1.99 1.81 1.58 Standard 38 × 89 2.41 2.08 1.70 2.07 1.79 1.46 1.84 1.60 1.30 38 × 89 2.67 2.43 2.12 2.33 2.12 1.85 2.12 1.93 1.68 38 × 140 4.20 3.82 3.33 3.67 3.33 2.91 3.33 3.03 2.65 Select 38 × 184 5.52 5.02 4.38 4.82 4.38 3.83 4.38 3.98 3.48 Structural 38 × 235 7.05 6.41 5.60 6.16 5.60 4.89 5.60 5.09 4.44 38 × 286 8.58 7.80 6.81 7.50 6.81 5.95 6.81 6.19 5.41 38 × 89 2.59 2.36 2.06 2.27 2.06 1.80 2.06 1.87 1.63 38 × 140 4.08 3.71 3.24 3.57 3.24 2.83 3.24 2.94 2.57 No. 1 and Hem – Fir 38 × 184 5.36 4.87 4.26 4.69 4.26 3.72 4.26 3.87 3.38 No. 2 (includes Western Hemlock 38 × 235 6.85 6.22 5.44 5.98 5.44 4.75 5.44 4.94 4.32 and Amabilis Fir) 38 × 286 8.34 7.57 6.62 7.28 6.62 5.77 6.62 6.01 5.25 38 × 89 2.51 2.28 1.99 2.20 1.99 1.74 1.99 1.81 1.58 38 × 140 3.95 3.59 3.10 3.45 3.14 2.67 3.14 2.85 2.37 No. 3 38 × 184 5.20 4.62 3.77 4.54 3.97 3.24 4.09 3.54 2.89 38 × 235 6.53 5.65 4.61 5.61 4.86 3.97 5.00 4.33 3.53 38 × 286 7.57 6.56 5.35 6.51 5.64 4.60 5.80 5.02 4.10 Construction 38 × 89 2.51 2.28 1.99 2.20 1.99 1.74 1.99 1.81 1.58 Standard 38 × 89 2.43 2.18 1.78 2.12 1.88 1.53 1.93 1.67 1.36 Table 9.23.4.2.-D (Cont'd) Maximum Spans for Roof Joists – Specified Roof Snow Loads 1.0 to 2.0 kPa Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(1), 9.23.4.5.(1) and 9.23.14.10.(2) Maximum Span, m Specified Snow Load, kPa Joist Size, Commercial Designation Grade 1.0 1.5 2.0 mm Joist Spacing, mm Joist Spacing, mm Joist Spacing, mm 300 400 600 300 400 600 300 400 600 38 × 89 2.55 2.32 2.03 2.23 2.03 1.77 2.03 1.84 1.61 38 × 140 4.02 3.65 3.19 3.51 3.19 2.79 3.19 2.90 2.53 Select 38 × 184 5.28 4.80 4.19 4.61 4.19 3.66 4.19 3.81 3.33 Structural 38 × 235 6.74 6.13 5.35 5.89 5.35 4.68 5.35 4.86 4.25 38 × 286 8.21 7.46 6.52 7.17 6.52 5.69 6.52 5.92 5.17 38 × 89 2.47 2.24 1.96 2.16 1.96 1.71 1.96 1.78 1.56 38 × 140 3.89 3.53 3.08 3.40 3.08 2.69 3.08 2.80 2.45 Spruce – Pine – Fir No. 1 and (includes Spruce (all species 38 × 184 5.11 4.64 4.05 4.46 4.05 3.54 4.05 3.68 3.22 No. 2 except Coast Sitka Spruce), 38 × 235 6.52 5.93 5.18 5.70 5.18 4.52 5.18 4.70 4.11 Jack Pine, Lodgepole Pine, 38 × 286 7.94 7.21 6.30 6.94 6.30 5.50 6.30 5.73 5.00 Balsam Fir and Alpine Fir) 38 × 89 2.43 2.20 1.93 2.12 1.93 1.68 1.93 1.75 1.53 38 × 140 3.82 3.47 3.03 3.33 3.03 2.65 3.03 2.75 2.37 No. 3 38 × 184 5.02 4.56 3.77 4.38 3.97 3.24 3.98 3.54 2.89 38 × 235 6.41 5.65 4.61 5.60 4.86 3.97 5.00 4.33 3.53 38 × 286 7.57 6.56 5.35 6.51 5.64 4.60 5.80 5.02 4.10 Construction 38 × 89 2.43 2.20 1.93 2.12 1.93 1.68 1.93 1.75 1.53 Standard 38 × 89 2.33 2.12 1.85 2.04 1.85 1.59 1.85 1.68 1.41 38 × 89 2.28 2.07 1.81 1.99 1.81 1.58 1.81 1.65 1.44 38 × 140 3.59 3.26 2.85 3.14 2.85 2.49 2.85 2.59 2.26 Select 38 × 184 4.72 4.29 3.75 4.12 3.75 3.27 3.75 3.40 2.97 Structural 38 × 235 6.03 5.48 4.79 5.27 4.79 4.18 4.79 4.35 3.80 38 × 286 7.34 6.67 5.82 6.41 5.82 5.09 5.82 5.29 4.62 38 × 89 2.23 2.03 1.77 1.95 1.77 1.55 1.77 1.61 1.41 38 × 140 3.51 3.19 2.79 3.07 2.79 2.43 2.79 2.53 2.21 Northern Species No. 1 and (includes any Canadian 38 × 184 4.61 4.19 3.66 4.03 3.66 3.20 3.66 3.33 2.91 No. 2 Species covered by the 38 × 235 5.89 5.35 4.68 5.15 4.68 4.09 4.68 4.25 3.68 NLGA Standard Grading 38 × 286 7.17 6.52 5.58 6.26 5.69 4.80 5.69 5.17 4.27 Rules) 38 × 89 2.18 1.98 1.73 1.90 1.73 1.50 1.73 1.57 1.33 38 × 140 3.42 3.05 2.49 2.99 2.62 2.14 2.69 2.33 1.90 No. 3 38 × 184 4.28 3.71 3.03 3.68 3.19 2.60 3.28 2.84 2.32 38 × 235 5.23 4.53 3.70 4.50 3.90 3.18 4.01 3.47 2.83 38 × 286 6.07 5.26 4.29 5.22 4.52 3.69 4.65 4.03 3.29 Construction 38 × 89 2.18 1.98 1.73 1.90 1.73 1.51 1.73 1.57 1.37 Standard 38 × 89 2.09 1.81 1.48 1.80 1.56 1.27 1.60 1.38 1.13 Table 9.23.4.2.-E Maximum Spans for Roof Joists – Specified Roof Snow Loads 2.5 and 3.0 kPa Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(1), 9.23.4.5.(1) and 9.23.14.10.(2) Maximum Span, m Specified Snow Load, kPa Joist Size, Commercial Designation Grade 2.5 3.0 mm Joist Spacing, mm Joist Spacing, mm 300 400 600 300 400 600 38 × 89 1.99 1.81 1.58 1.88 1.71 1.49 38 × 140 3.14 2.85 2.49 2.95 2.68 2.34 Select 38 × 184 4.12 3.75 3.27 3.88 3.53 3.08 Structural 38 × 235 5.27 4.79 4.18 4.96 4.50 3.93 38 × 286 6.41 5.82 5.09 6.03 5.48 4.79 38 × 89 1.91 1.74 1.52 1.80 1.63 1.43 38 × 140 3.01 2.73 2.39 2.83 2.57 2.25 No. 1 and Douglas Fir – Larch 38 × 184 3.95 3.59 3.14 3.72 3.38 2.90 No. 2 (includes Douglas Fir and 38 × 235 5.05 4.59 3.84 4.75 4.32 3.55 Western Larch) 38 × 286 6.14 5.46 4.46 5.78 5.05 4.12 38 × 89 1.74 1.50 1.23 1.60 1.39 1.13 38 × 140 2.48 2.15 1.75 2.29 1.98 1.62 No. 3 38 × 184 3.01 2.61 2.13 2.79 2.41 1.97 38 × 235 3.69 3.19 2.61 3.41 2.95 2.41 38 × 286 4.28 3.70 3.03 3.95 3.42 2.79 Construction 38 × 89 1.85 1.68 1.47 1.74 1.58 1.38 Standard 38 × 89 1.68 1.45 1.19 1.55 1.34 1.10 38 × 89 1.97 1.79 1.56 1.85 1.68 1.47 38 × 140 3.10 2.81 2.46 2.91 2.65 2.31 Select 38 × 184 4.07 3.70 3.23 3.83 3.48 3.04 Structural 38 × 235 5.20 4.72 4.12 4.89 4.44 3.88 38 × 286 6.32 5.75 5.02 5.95 5.41 4.72 38 × 89 1.91 1.74 1.52 1.80 1.63 1.43 38 × 140 3.01 2.73 2.39 2.83 2.57 2.25 No. 1 and Hem – Fir 38 × 184 3.95 3.59 3.14 3.72 3.38 2.95 No. 2 (includes Western Hemlock 38 × 235 5.05 4.59 4.01 4.75 4.32 3.72 and Amabilis Fir) 38 × 286 6.14 5.58 4.68 5.78 5.25 4.32 38 × 89 1.85 1.68 1.47 1.74 1.58 1.38 38 × 140 2.91 2.65 2.16 2.74 2.45 2.00 No. 3 38 × 184 3.72 3.22 2.63 3.44 2.98 2.43 38 × 235 4.55 3.94 3.22 4.20 3.64 2.97 38 × 286 5.28 4.57 3.73 4.88 4.22 3.45 Construction 38 × 89 1.85 1.68 1.47 1.74 1.58 1.38 Standard 38 × 89 1.76 1.52 1.24 1.62 1.40 1.15 Table 9.23.4.2.-E (Cont'd) Maximum Spans for Roof Joists – Specified Roof Snow Loads 2.5 and 3.0 kPa Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(1), 9.23.4.5.(1) and 9.23.14.10.(2) Maximum Span, m Specified Snow Load, kPa Joist Size, Commercial Designation Grade 2.5 3.0 mm Joist Spacing, mm Joist Spacing, mm 300 400 600 300 400 600 38 × 89 1.88 1.71 1.49 1.77 1.61 1.41 38 × 140 2.96 2.69 2.35 2.79 2.53 2.21 Select 38 × 184 3.89 3.54 3.09 3.66 3.33 2.91 Structural 38 × 235 4.97 4.52 3.94 4.68 4.25 3.71 38 × 286 6.05 5.50 4.80 5.69 5.17 4.52 38 × 89 1.82 1.65 1.44 1.71 1.56 1.36 38 × 140 2.86 2.60 2.27 2.69 2.45 2.14 Spruce – Pine – Fir No. 1 and (includes Spruce (all species 38 × 184 3.76 3.42 2.99 3.54 3.22 2.81 No. 2 except Coast Sitka Spruce), 38 × 235 4.81 4.37 3.82 4.52 4.11 3.59 Jack Pine, Lodgepole Pine, 38 × 286 5.85 5.31 4.64 5.50 5.00 4.37 Balsam Fir and Alpine Fir) 38 × 89 1.79 1.62 1.42 1.68 1.53 1.34 38 × 140 2.81 2.56 2.16 2.65 2.40 2.005 No. 3 38 × 184 3.70 3.22 2.63 3.44 2.98 2.43 38 × 235 4.55 3.94 3.22 4.20 3.64 2.97 38 × 286 5.28 4.57 3.73 4.88 4.22 3.45 Construction 38 × 89 1.79 1.62 1.42 1.68 1.53 1.34 Standard 38 × 89 1.72 1.56 1.29 1.62 1.46 1.19 38 × 89 1.68 1.53 1.34 1.58 1.44 1.26 38 × 140 2.65 2.40 2.10 2.49 2.26 1.98 Select 38 × 184 3.48 3.16 2.76 3.27 2.97 2.60 Structural 38 × 235 4.44 4.04 3.53 4.18 3.80 3.32 38 × 286 5.41 4.91 4.29 5.09 4.62 4.04 38 × 89 1.64 1.49 1.31 1.55 1.41 1.23 38 × 140 2.59 2.35 2.05 2.43 2.21 1.93 Northern Species No. 1 and 38 × 184 3.40 3.09 2.70 3.20 2.91 2.53 (includes any Canadian No. 2 38 × 235 4.34 3.94 3.35 4.09 3.71 3.10 Species covered by the NLGA Standard Grading Rules) 38 × 286 5.28 4.76 3.89 4.97 4.40 3.59 38 × 89 1.60 1.46 1.21 1.51 1.37 1.12 38 × 140 2.45 2.12 1.73 2.26 1.96 1.60 No. 3 38 × 184 2.98 2.58 2.11 2.76 2.39 1.95 38 × 235 3.65 3.16 2.58 3.37 2.92 2.38 38 × 286 4.23 3.66 2.99 3.91 3.39 2.76 Construction 38 × 89 1.60 1.46 1.27 1.51 1.37 1.20 Standard 38 × 89 1.46 1.26 1.03 1.34 1.16 0.95 Table 9.23.4.2.-F Maximum Spans for Roof Rafters – Specified Roof Snow Loads 1.0 to 2.0 kPa Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(1), 9.23.4.5.(1) and 9.23.14.10.(2) Maximum Span, m Specified Snow Load, kPa Rafter Size, Commercial Designation Grade 1.0 1.5 2.0 mm Rafter Spacing, mm Rafter Spacing, mm Rafter Spacing, mm 300 400 600 300 400 600 300 400 600 38 × 89 3.41 3.10 2.71 2.98 2.71 2.37 2.71 2.46 2.15 38 × 140 5.37 4.88 4.26 4.69 4.26 3.72 4.26 3.87 3.38 Select 38 × 184 7.05 6.41 5.60 6.16 5.60 4.89 5.60 5.09 4.44 Structural 38 × 235 9.01 8.18 7.15 7.87 7.15 6.24 7.15 6.49 5.62 38 × 286 10.96 9.96 8.70 9.58 8.70 7.40 8.70 7.90 6.52 38 × 89 3.27 2.97 2.59 2.86 2.59 2.27 2.59 2.36 2.06 38 × 140 5.14 4.67 3.95 4.49 4.08 3.34 4.08 3.60 2.94 No. 1 and Douglas Fir – Larch 38 × 184 6.76 5.88 4.80 5.74 4.97 4.06 5.06 4.38 3.58 No. 2 (includes Douglas Fir and 38 × 235 8.30 7.19 5.87 7.02 6.08 4.96 6.19 5.36 4.38 Western Larch) 38 × 286 9.63 8.34 6.81 8.14 7.05 5.76 7.18 6.22 5.08 38 × 89 2.65 2.30 1.87 2.24 1.94 1.58 1.98 1.71 1.40 38 × 140 3.78 3.28 2.68 3.20 2.77 2.26 2.82 2.44 1.99 No. 3 38 × 184 4.61 3.99 3.26 3.89 3.37 2.75 3.43 2.97 2.43 38 × 235 5.63 4.88 3.98 4.76 4.12 3.37 4.20 3.64 2.97 38 × 286 6.53 5.66 4.62 5.52 4.78 3.91 4.87 4.22 3.44 Construction 38 × 89 3.17 2.88 2.42 2.77 2.50 2.04 2.51 2.21 1.80 Standard 38 × 89 2.56 2.22 1.81 2.17 1.88 1.53 1.91 1.65 1.35 38 × 89 3.36 3.06 2.67 2.94 2.67 2.33 2.67 2.43 2.12 38 × 140 5.29 4.81 4.20 4.62 4.20 3.67 4.20 3.82 3.33 Select 38 × 184 6.96 6.32 5.52 6.08 5.52 4.82 5.52 5.02 4.38 Structural 38 × 235 8.88 8.07 7.05 7.76 7.05 6.16 7.05 6.41 5.54 38 × 286 10.81 9.82 8.58 9.45 8.58 7.28 8.58 7.80 6.42 38 × 89 3.27 2.97 2.59 2.86 2.59 2.27 2.59 2.36 2.06 38 × 140 5.14 4.67 4.08 4.49 4.08 3.50 4.08 3.71 3.08 No. 1 and Hem – Fir 38 × 184 6.76 6.14 5.04 5.90 5.21 4.26 5.31 4.60 3.75 No. 2 (includes Western Hemlock 38 × 235 8.63 7.54 6.16 7.36 6.37 5.20 6.49 5.62 4.59 and Amabilis Fir) 38 × 286 10.11 8.75 7.15 8.54 7.40 6.04 7.53 6.52 5.33 38 × 89 3.17 2.83 2.31 2.76 2.39 1.95 2.44 2.11 1.72 38 × 140 4.67 4.04 3.30 3.95 3.42 2.79 3.48 3.01 2.46 No. 3 38 × 184 5.68 4.92 4.02 4.80 4.16 3.40 4.23 3.67 2.99 38 × 235 6.95 6.02 4.91 5.87 5.08 4.15 5.18 4.48 3.66 38 × 286 8.06 6.98 5.70 6.81 5.90 4.82 6.01 5.20 4.25 Construction 38 × 89 3.17 2.88 2.51 2.77 2.51 2.14 2.51 2.28 1.89 Standard 38 × 89 2.68 2.32 1.90 2.27 1.96 1.60 2.00 1.73 1.41 Table 9.23.4.2.-F (Cont'd) Maximum Spans for Roof Rafters – Specified Roof Snow Loads 1.0 to 2.0 kPa Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(1), 9.23.4.5.(1) and 9.23.14.10.(2) Maximum Span, m Specified Snow Load, kPa Rafter Size, Commercial Designation Grade 1.0 1.5 2.0 mm Rafter Spacing, mm Rafter Spacing, mm Rafter Spacing, mm 300 400 600 300 400 600 300 400 600 38 × 89 3.22 2.92 2.55 2.81 2.55 2.23 2.55 2.32 2.03 38 × 140 5.06 4.60 4.02 4.42 4.02 3.51 4.02 3.65 3.19 Select 38 × 184 6.65 6.05 5.28 5.81 5.28 4.61 5.28 4.80 4.19 Structural 38 × 235 8.50 7.72 6.74 7.42 6.74 5.89 6.74 6.13 5.35 38 × 286 10.34 9.40 8.21 9.03 8.21 7.17 8.21 7.46 6.52 38 × 89 3.11 2.83 2.47 2.72 2.47 2.16 2.47 2.24 1.96 38 × 140 4.90 4.45 3.89 4.28 3.89 3.40 3.89 3.53 3.08 Spruce – Pine – Fir No. 1 and (includes Spruce (all species 38 × 184 6.44 5.85 5.11 5.62 5.11 4.41 5.11 4.64 3.89 No. 2 except Coast Sitka Spruce), 38 × 235 8.22 7.47 6.38 7.18 6.52 5.39 6.52 5.82 4.75 Jack Pine, Lodgepole Pine, 38 × 286 10.00 9.06 7.40 8.74 7.66 6.25 7.80 6.76 5.52 Balsam Fir and Alpine Fir) 38 × 89 3.06 2.78 2.31 2.67 2.39 1.95 2.43 2.11 1.72 38 × 140 4.67 4.04 3.30 3.95 3.42 2.79 3.48 3.01 2.46 No. 3 38 × 184 5.68 4.92 4.02 4.80 4.16 3.40 4.23 3.67 2.99 38 × 235 6.95 6.02 4.91 5.87 5.08 4.15 5.18 4.48 3.66 38 × 286 8.06 6.98 5.70 6.81 5.90 4.82 6.01 5.20 4.25 Construction 38 × 89 3.06 2.78 2.43 2.67 2.43 2.12 2.43 2.20 1.93 Standard 38 × 89 2.78 2.41 1.97 2.35 2.04 1.66 2.07 1.79 1.47 38 × 89 2.88 2.61 2.28 2.51 2.28 1.99 2.28 2.07 1.81 38 × 140 4.53 4.11 3.59 3.95 3.59 3.14 3.59 3.26 2.85 Select 38 × 184 5.95 5.40 4.72 5.20 4.72 4.12 4.72 4.29 3.68 Structural 38 × 235 7.60 6.90 6.03 6.64 6.03 5.11 6.03 5.48 4.51 38 × 286 9.25 8.40 7.01 8.08 7.26 5.93 7.34 6.40 5.23 38 × 89 2.81 2.55 2.23 2.46 2.23 1.95 2.23 2.03 1.77 38 × 140 4.42 4.02 3.44 3.86 3.51 2.91 3.51 3.14 2.56 Northern Species No. 1 and (includes any Canadian 38 × 184 5.81 5.13 4.19 5.00 4.33 3.54 4.41 3.82 3.12 No. 2 species covered by the 38 × 235 7.24 6.27 5.12 6.12 5.30 4.33 5.40 4.67 3.82 NLGA Standard Grading 38 × 286 8.40 7.27 5.94 7.10 6.15 5.02 6.26 5.42 4.43 Rules) 38 × 89 2.62 2.27 1.85 2.22 1.92 1.57 1.95 1.69 1.38 38 × 140 3.74 3.24 2.65 3.16 2.74 2.24 2.79 2.42 1.97 No. 3 38 × 184 4.56 3.94 3.22 3.85 3.33 2.72 3.40 2.94 2.40 38 × 235 5.57 4.82 3.94 4.71 4.08 3.33 4.15 3.60 2.94 38 × 286 6.46 5.60 4.57 5.46 4.73 3.86 4.82 4.17 3.41 Construction 38 × 89 2.74 2.49 2.11 2.40 2.18 1.90 2.18 1.93 1.57 Standard 38 × 89 2.22 1.93 1.57 1.88 1.63 1.33 1.66 1.44 1.17 Table 9.23.4.2.-G Maximum Spans for Roof Rafters – Specified Roof Snow Loads 2.5 and 3.0 kPa Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(1) and 9.23.4.5.(1) Maximum Span, m Specified Snow Load, kPa Rafter Size, Commercial Designation Grade 2.5 3.0 mm Rafter Spacing, mm Rafter Spacing, mm 300 400 600 300 400 600 38 × 89 2.51 2.28 1.99 2.37 2.15 1.88 38 × 140 3.95 3.59 3.14 3.72 3.38 2.95 Select 38 × 184 5.20 4.72 4.12 4.89 4.44 3.83 Structural 38 × 235 6.64 6.03 5.08 6.24 5.67 4.68 38 × 286 8.08 7.23 5.90 7.60 6.65 5.43 38 × 89 2.41 2.19 1.86 2.27 2.06 1.71 38 × 140 3.76 3.26 2.66 3.46 3.00 2.45 No. 1 and Douglas Fir – Larch 38 × 184 4.58 3.96 3.24 4.21 3.65 2.98 No. 2 (includes Douglas Fir and 38 × 235 5.60 4.85 3.96 5.15 4.46 3.64 Western Larch) 38 × 286 6.50 5.63 4.59 5.98 5.17 4.23 38 × 89 1.79 1.55 1.26 1.64 1.42 1.16 38 × 140 2.55 2.21 1.80 2.35 2.03 1.66 No. 3 38 × 184 3.10 2.69 2.20 2.86 2.47 2.02 38 × 235 3.80 3.29 2.68 3.49 3.02 2.47 38 × 286 4.41 3.82 3.12 4.05 3.51 2.87 Construction 38 × 89 2.30 2.00 1.63 2.12 1.84 1.50 Standard 38 × 89 1.73 1.50 1.22 1.59 1.38 1.12 38 × 89 2.48 2.25 1.97 2.33 2.12 1.85 38 × 140 3.90 3.54 3.10 3.67 3.33 2.91 Select 38 × 184 5.13 4.66 4.07 4.82 4.38 3.77 Structural 38 × 235 6.55 5.95 5.01 6.16 5.60 4.61 38 × 286 7.97 7.12 5.81 7.50 6.55 5.34 38 × 89 2.41 2.19 1.91 2.27 2.06 1.80 38 × 140 3.79 3.42 2.79 3.57 3.14 2.57 No. 1 and Hem – Fir 38 × 184 4.80 4.16 3.40 4.42 3.83 3.12 No. 2 (includes Western Hemlock 38 × 235 5.87 5.08 4.15 5.40 4.68 3.82 and Amabilis Fir) 38 × 286 6.81 5.90 4.82 6.27 5.43 4.43 38 × 89 2.21 1.91 1.56 2.03 1.76 1.43 38 × 140 3.15 2.73 2.23 2.90 2.51 2.05 No. 3 38 × 184 3.83 3.32 2.71 3.52 3.05 2.49 38 × 235 4.68 4.06 3.31 4.31 3.73 3.05 38 × 286 5.53 4.71 3.84 5.00 4.33 3.54 Commercial 38 × 89 2.33 2.09 1.71 2.20 1.93 1.57 Standard 38 × 89 1.81 1.57 1.28 1.66 1.44 1.18 Table 9.23.4.2.-G (Cont'd) Maximum Spans for Roof Rafters – Specified Roof Snow Loads 2.5 and 3.0 kPa Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(1) and 9.23.4.5.(1) Maximum Span, m Specified Snow Load, kPa Rafter Size, Commercial Designation Grade 2.5 3.0 mm Rafter Spacing, mm Rafter Spacing, mm 300 400 600 300 400 600 38 × 89 2.37 2.15 1.88 2.23 2.03 1.77 38 × 140 3.73 3.39 2.96 3.51 3.19 2.79 Select 38 × 184 4.90 4.45 3.89 4.61 4.19 3.66 Structural 38 × 235 6.26 5.69 4.97 5.89 5.35 4.68 38 × 286 7.62 6.92 5.90 7.17 6.52 5.43 38 × 89 2.29 2.08 1.82 2.16 1.96 1.71 38 × 140 3.61 3.28 2.86 3.40 3.08 2.66 Spruce – Pine – Fir No. 1 and (includes Spruce (all species 38 × 184 4.74 4.31 3.52 4.46 3.96 3.23 No. 2 except Coast Sitka Spruce), 38 × 235 6.06 5.27 4.30 5.59 4.84 3.96 Jack Pine, Lodgepole Pine, 38 × 286 7.06 6.11 4.99 6.49 5.62 4.59 Balsam Fir and Alpine Fir) 38 × 89 2.21 1.91 1.56 2.03 1.76 1.43 38 × 140 3.15 2.73 2.23 2.90 2.51 2.05 No. 3 38 × 184 3.83 3.32 2.71 3.52 3.05 2.49 38 × 235 4.68 4.06 3.31 4.31 3.73 3.05 38 × 286 5.43 4.71 3.84 5.00 4.33 3.54 Construction 38 × 89 2.25 2.05 1.77 2.12 1.93 1.63 Standard 38 × 89 1.87 1.62 1.33 1.72 1.49 1.22 38 × 89 2.12 1.93 1.68 1.99 1.81 1.58 38 × 140 3.33 3.03 2.65 3.14 2.85 2.49 Select 38 × 184 4.38 3.98 3.33 4.12 3.75 3.07 Structural 38 × 235 5.60 4.99 4.08 5.27 4.59 3.75 38 × 286 6.69 5.79 4.73 6.15 5.33 4.35 38 × 89 2.07 1.88 1.62 1.95 1.77 1.49 38 × 140 3.26 2.84 2.32 3.02 2.61 2.13 Northern Species No. 1 and 38 × 184 3.99 3.46 2.82 3.67 3.18 2.60 (includes any Canadian No. 2 38 × 235 4.88 4.23 3.45 4.49 3.89 3.17 species covered by the NLGA Standard Grading Rules) 38 × 286 5.66 4.90 4.00 5.21 4.51 3.68 38 × 89 1.77 1.53 1.25 1.63 1.41 1.15 38 × 140 2.52 2.19 1.78 2.32 2.01 1.64 No. 3 38 × 184 3.07 2.66 2.17 2.82 2.45 2.00 38 × 235 3.76 3.25 2.66 3.45 2.99 2.44 38 × 286 4.36 3.77 3.08 4.01 3.47 2.83 Construction 38 × 89 2.01 1.74 1.42 1.85 1.60 1.31 Standard 38 × 89 1.50 1.30 1.06 1.38 1.19 0.98 Table 9.23.4.2.-H Maximum Spans for Built-up Floor Beams Supporting Not More than One Floor(1)(2) Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(3), 9.23.4.4.(3) and 9.23.8.1.(1) Maximum Span, m(5)(6) Supported Commercial Size of Built-up Beam, mm Grade Length, Designation 3– 4– 5– 3– 4– 5– 3– 4– 5– m(3)(4) 38 × 184 38 × 184 38 × 184 38 × 235 38 × 235 38 × 235 38 × 286 38 × 286 38 × 286 2.4 3.36 3.70 3.99 4.30 4.73 5.09 5.23 5.66 5.99 3.0 3.12 3.44 3.70 3.99 4.39 4.73 4.84 5.34 5.66 3.6 2.94 3.23 3.48 3.75 4.13 4.45 4.41 5.03 5.41 Select 4.2 2.79 3.07 3.31 3.52 3.92 4.23 4.09 4.72 5.14 Structural 4.8 2.67 2.94 3.17 3.29 3.75 4.04 3.82 4.41 4.92 5.4 2.54 2.83 3.04 3.11 3.59 3.89 3.60 4.16 4.65 Douglas Fir – Larch 6.0 2.41 2.73 2.94 2.95 3.40 3.75 3.42 3.95 4.41 (includes Douglas Fir and Western Larch) 2.4 2.97 3.42 3.82 3.63 4.19 4.68 4.21 4.86 5.43 3.0 2.65 3.06 3.42 3.24 3.75 4.19 3.76 4.35 4.86 3.6 2.42 2.80 3.13 2.96 3.42 3.82 3.44 3.97 4.44 No. 1 and 4.2 2.24 2.59 2.89 2.74 3.17 3.54 3.18 3.67 4.11 No. 2 4.8 2.10 2.42 2.71 2.56 2.96 3.31 2.98 3.44 3.84 5.4 1.98 2.28 2.55 2.42 2.79 3.12 2.81 3.24 3.62 6.0 1.88 2.17 2.42 2.29 2.65 2.96 2.66 3.07 3.44 2.4 3.32 3.65 3.93 4.24 4.66 5.03 5.16 5.61 5.93 3.0 3.08 3.39 3.65 3.93 4.33 4.66 4.76 5.27 5.61 3.6 2.90 3.19 3.44 3.70 4.08 4.39 4.35 4.96 5.34 Select 4.2 2.75 3.03 3.27 3.47 3.87 4.17 4.02 4.65 5.07 Structural 4.8 2.63 2.90 3.12 3.24 3.70 3.99 3.66 4.35 4.85 5.4 2.49 2.79 3.00 2.95 3.53 3.83 3.32 4.10 4.58 Hem – Fir (includes Western 6.0 2.28 2.69 2.90 2.70 3.35 3.70 3.04 3.87 4.35 Hemlock and Amabilis 2.4 3.11 3.55 3.82 3.80 4.39 4.88 4.41 5.10 5.70 Fir) 3.0 2.78 3.21 3.55 3.40 3.93 4.39 3.95 4.56 5.10 3.6 2.54 2.93 3.28 3.11 3.59 4.01 3.60 4.16 4.65 No. 1 and 4.2 2.35 2.72 3.04 2.88 3.32 3.71 3.34 3.85 4.31 No. 2 4.8 2.20 2.54 2.84 2.69 3.11 3.47 3.12 3.60 4.03 5.4 2.07 2.39 2.68 2.54 2.93 3.27 2.94 3.40 3.80 6.0 1.97 2.27 2.54 2.41 2.78 3.11 2.79 3.22 3.60 Table 9.23.4.2.-H (Cont'd) Maximum Spans for Built-up Floor Beams Supporting Not More than One Floor(1)(2) Forming Part Sentences 9.23.2.8.(1), 9.23.4.2.(3), 9.23.4.4.(3) and 9.23.8.1.(1) Maximum Span, m(5)(6) Supported Commercial Size of Built-up Beam, mm Grade Length, Designation 3– 4– 5– 3– 4– 5– 3– 4– 5– m(3)(4) 38 × 184 38 × 184 38 × 184 38 × 235 38 × 235 38 × 235 38 × 286 38 × 286 38 × 286 2.4 3.17 3.49 3.76 4.05 4.46 4.81 4.93 5.42 5.73 3.0 2.95 3.24 3.49 3.76 4.14 4.46 4.58 5.04 5.42 3.6 2.77 3.05 3.29 3.54 3.90 4.20 4.31 4.74 5.11 Select 4.2 2.63 2.90 3.12 3.36 3.70 3.99 4.09 4.51 4.85 Structural Spruce – Pine – Fir 4.8 2.52 2.77 2.99 3.22 3.54 3.81 3.82 4.31 4.64 (includes Spruce (all 5.4 2.42 2.67 2.87 3.09 3.41 3.67 3.60 4.14 4.46 species except Coast 6.0 2.34 2.57 2.77 2.95 3.29 3.54 3.32 3.95 4.31 Sitka Spruce), Jack Pine, Lodgepole Pine, 2.4 3.07 3.38 3.64 3.92 4.32 4.65 4.57 5.25 5.59 Balsam Fir and Alpine 3.0 2.85 3.14 3.38 3.52 4.01 4.32 4.09 4.72 5.25 Fir) 3.6 2.63 2.95 3.18 3.22 3.71 4.06 3.73 4.31 4.82 No. 1 and 4.2 2.44 2.80 3.02 2.98 3.44 3.84 3.46 3.99 4.46 No. 2 4.8 2.28 2.63 2.89 2.79 3.22 3.60 3.23 3.73 4.17 5.4 2.15 2.48 2.77 2.63 3.03 3.39 3.05 3.52 3.93 6.0 2.04 2.35 2.63 2.49 2.88 3.22 2.89 3.34 3.73 2.4 2.84 3.12 3.36 3.62 3.99 4.30 4.33 4.85 5.23 3.0 2.63 2.90 3.12 3.34 3.70 3.99 3.88 4.47 4.85 3.6 2.48 2.73 2.94 3.05 3.48 3.75 3.54 4.08 4.57 Select 4.2 2.31 2.59 2.79 2.82 3.26 3.57 3.28 3.78 4.23 Structural 4.8 2.16 2.48 2.67 2.64 3.05 3.41 3.06 3.54 3.96 Northern Species 5.4 2.04 2.35 2.57 2.49 2.87 3.21 2.89 3.34 3.73 (includes any Canadian species 6.0 1.93 2.23 2.48 2.36 2.73 3.05 2.74 3.16 3.54 covered by the NLGA 2.4 2.59 2.99 3.29 3.16 3.65 4.08 3.67 4.24 4.74 Standard Grading 3.0 2.31 2.67 2.99 2.83 3.27 3.65 3.28 3.79 4.24 Rules) 3.6 2.11 2.44 2.73 2.58 2.98 3.33 3.00 3.46 3.87 No. 1 and 4.2 1.95 2.26 2.52 2.39 2.76 3.09 2.77 3.20 3.58 No. 2 4.8 1.83 2.11 2.36 2.24 2.58 2.89 2.59 3.00 3.35 5.4 1.72 1.99 2.23 2.11 2.43 2.72 2.45 2.82 3.16 6.0 1.64 1.89 2.11 2.00 2.31 2.58 2.32 2.68 3.00 Notes to Table 9.23.4.2.-H: (1) Beam spans apply only where the floors serve residential areas as described in Table 4.1.5.3., or the uniformly distributed live load on the floors does not exceed that specified for residential areas as described in Table 4.1.5.3. (2) When the floors have a concrete topping of not more than 51 mm, the spans must be multiplied by 0.8. (3) Supported length means half the sum of the joists spans on both sides of the beam. (4) Straight interpolation may be used for other supported lengths. (5) Spans are clear spans between supports. For total span, add two bearing lengths. (6) 3-ply beams with supported lengths greater than 4.2 m require minimum bearing length of 114 mm. All other beams require minimum bearing length of 76 mm. Table 9.23.4.2.-I Maximum Spans for Built-up Floor Beams Supporting Not More than Two Floors(1)(2) Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(3), 9.23.4.4.(3) and 9.23.8.1.(1) Maximum Span, m(5)(6) Supported Size of Built-up Beam, mm Commercial Designation Grade Length, m(3)(4) 3– 4– 5– 3– 4– 5– 3– 4– 5– 38 × 184 38 × 184 38 × 184 38 × 235 38 × 235 38 × 235 38 × 286 38 × 286 38 × 286 2.4 2.80 3.08 3.32 3.49 3.93 4.24 4.05 4.67 5.16 3.0 2.55 2.86 3.08 3.12 3.60 3.93 3.62 4.18 4.67 3.6 2.33 2.69 2.90 2.85 3.29 3.68 3.30 3.82 4.27 Select 4.2 2.16 2.49 2.75 2.64 3.04 3.40 2.99 3.53 3.95 Structural 4.8 2.00 2.33 2.60 2.38 2.85 3.18 2.69 3.30 3.69 5.4 1.82 2.20 2.45 2.17 2.68 3.00 2.45 3.08 3.48 Douglas Fir – Larch 6.0 1.67 2.08 2.33 2.00 2.51 2.85 2.26 2.83 3.30 (includes Douglas Fir and Western Larch) 2.4 2.22 2.56 2.87 2.72 3.14 3.51 3.15 3.64 4.07 3.0 1.99 2.29 2.56 2.43 2.80 3.14 2.82 3.25 3.64 3.6 1.81 2.09 2.34 2.22 2.56 2.86 2.57 2.97 3.32 No. 1 and 4.2 1.68 1.94 2.17 2.05 2.37 2.65 2.38 2.75 3.07 No. 2 4.8 1.57 1.81 2.03 1.92 2.22 2.48 2.23 2.57 2.88 5.4 1.48 1.71 1.91 1.81 2.09 2.34 2.10 2.43 2.71 6.0 1.40 1.62 1.81 1.72 1.98 2.22 1.99 2.30 2.57 2.4 2.76 3.04 3.27 3.43 3.88 4.18 3.99 4.60 5.09 3.0 2.51 2.82 3.04 2.97 3.55 3.88 3.34 4.12 4.60 3.6 2.15 2.65 2.86 2.56 3.24 3.62 2.88 3.65 4.20 Select 4.2 1.90 2.40 2.72 2.26 2.85 3.35 2.55 3.21 3.87 Structural 4.8 1.70 2.15 2.56 2.03 2.56 3.08 2.30 2.88 3.46 5.4 1.56 1.95 2.35 1.86 2.32 2.79 2.11 2.62 3.14 Hem – Fir 6.0 1.44 1.79 2.15 1.72 2.14 2.56 1.96 2.42 2.88 (includes Western Hemlock and Amabilis Fir) 2.4 2.33 2.69 3.01 2.85 3.29 3.68 3.30 3.82 4.27 3.0 2.08 2.41 2.69 2.55 2.94 3.29 2.96 3.41 3.82 3.6 1.90 2.20 2.45 2.33 2.68 3.00 2.70 3.12 3.48 No. 1 and 4.2 1.76 2.03 2.27 2.15 2.49 2.78 2.50 2.88 3.22 No. 2 4.8 1.65 1.90 2.13 2.01 2.33 2.60 2.30 2.70 3.02 5.4 1.55 1.79 2.00 1.86 2.19 2.45 2.11 2.54 2.84 6.0 1.44 1.70 1.90 1.72 2.08 2.33 1.96 2.41 2.70 Table 9.23.4.2.-I (Cont'd) Maximum Spans for Built-up Floor Beams Supporting Not More than Two Floors(1)(2) Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(3), 9.23.4.4.(3) and 9.23.8.1.(1) Maximum Span, m(5)(6) Supported Size of Built-up Beam, mm Commercial Designation Grade Length, m(3)(4) 3– 4– 5– 3– 4– 5– 3– 4– 5– 38 × 184 38 × 184 38 × 184 38 × 235 38 × 235 38 × 235 38 × 286 38 × 286 38 × 286 2.4 2.64 2.91 3.13 3.37 3.71 4.00 4.05 4.52 4.87 3.0 2.45 2.70 2.91 3.12 3.45 3.71 3.62 4.18 4.52 3.6 2.31 2.54 2.73 2.79 3.24 3.49 3.14 3.82 4.25 Select 4.2 2.07 2.41 2.60 2.46 3.04 3.32 2.77 3.50 3.95 Structural 4.8 1.85 2.31 2.48 2.21 2.79 3.17 2.50 3.14 3.69 Spruce – Pine – Fir 5.4 1.69 2.13 2.39 2.02 2.53 3.00 2.28 2.85 3.42 (includes Spruce (all species except Coast Sitka 6.0 1.56 1.95 2.31 1.86 2.32 2.79 2.11 2.62 3.14 Spruce), Jack Pine, 2.4 2.41 2.79 3.03 2.95 3.41 3.81 3.42 3.95 4.42 Lodgepole Pine, Balsam Fir 3.0 2.16 2.49 2.79 2.64 3.05 3.41 3.06 3.53 3.95 and Alpine Fir) 3.6 1.97 2.27 2.54 2.41 2.78 3.11 2.79 3.23 3.61 No. 1 and 4.2 1.82 2.11 2.35 2.23 2.57 2.88 2.59 2.99 3.34 No. 2 4.8 1.71 1.97 2.20 2.09 2.41 2.69 2.42 2.79 3.12 5.4 1.61 1.86 2.08 1.97 2.27 2.54 2.28 2.63 2.95 6.0 1.53 1.76 1.97 1.86 2.15 2.41 2.11 2.50 2.79 2.4 2.29 2.60 2.80 2.80 3.23 3.57 3.24 3.75 4.19 3.0 2.04 2.36 2.60 2.50 2.89 3.23 2.90 3.35 3.75 3.6 1.87 2.16 2.41 2.28 2.64 2.95 2.65 3.06 3.42 Select 4.2 1.73 2.00 2.23 2.11 2.44 2.73 2.45 2.83 3.17 Structural 4.8 1.62 1.87 2.09 1.98 2.28 2.55 2.29 2.65 2.96 Northern Species 5.4 1.52 1.76 1.97 1.86 2.15 2.41 2.11 2.50 2.79 (includes any Canadian 6.0 1.44 1.67 1.87 1.72 2.04 2.28 1.96 2.37 2.65 species covered by the NLGA Standard Grading 2.4 1.94 2.24 2.50 2.37 2.73 3.06 2.75 3.17 3.55 Rules) 3.0 1.73 2.00 2.24 2.12 2.44 2.73 2.46 2.84 3.17 3.6 1.58 1.83 2.04 1.93 2.23 2.50 2.24 2.59 2.90 No. 1 and 4.2 1.46 1.69 1.89 1.79 2.07 2.31 2.08 2.40 2.68 No. 2 4.8 1.37 1.58 1.77 1.67 1.93 2.16 1.94 2.24 2.51 5.4 1.29 1.49 1.67 1.58 1.82 2.04 1.83 2.11 2.36 6.0 1.22 1.41 1.58 1.50 1.73 1.93 1.74 2.01 2.24 Notes to Table 9.23.4.2.-I: (1) Beam spans apply only where the floors serve residential areas as described in Table 4.1.5.3., or the uniformly distributed live load on the floors does not exceed that specified for residential areas as described in Table 4.1.5.3. (2) When the floors have a concrete topping of not more than 51 mm, the spans must be multiplied by 0.8. (3) Supported length means half the sum of the joists spans on both sides of the beam. (4) Straight interpolation may be used for other supported lengths. (5) Spans are clear spans between supports. For total span, add two bearing lengths. (6) 3-ply beams require minimum bearing length of 114 mm. 4-ply and 5-ply beams with supported lengths greater than 3 m require minimum bearing length of 114 mm. All other beams require minimum bearing length of 76 mm. Table 9.23.4.2.-J Maximum Spans for Built-up Floor Beams Supporting Not More than Three Floors(1)(2) Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(3), 9.23.4.4.(3) and 9.23.8.1.(1) Maximum Span, m(5)(6) Supported Size of Built-up Beam, mm Commercial Designation Grade Length, m(3)(4) 3– 4– 5– 3– 4– 5– 3– 4– 5– 38 × 184 38 × 184 38 × 184 38 × 235 38 × 235 38 × 235 38 × 286 38 × 286 38 × 286 2.4 2.38 2.74 2.95 2.91 3.36 3.75 3.37 3.89 4.35 3.0 2.13 2.46 2.74 2.60 3.00 3.36 2.92 3.48 3.89 3.6 1.88 2.24 2.51 2.24 2.74 3.06 2.53 3.18 3.56 Select 4.2 1.66 2.08 2.32 1.99 2.49 2.84 2.25 2.81 3.29 Structural 4.8 1.50 1.88 2.17 1.80 2.24 2.65 2.04 2.53 3.02 5.4 1.38 1.71 2.05 1.65 2.04 2.44 1.88 2.31 2.75 Douglas Fir – Larch 6.0 1.28 1.58 1.88 1.53 1.89 2.24 1.75 2.14 2.53 (includes Douglas Fir and Western Larch) 2.4 1.85 2.14 2.39 2.26 2.61 2.92 2.63 3.03 3.39 3.0 1.66 1.91 2.14 2.02 2.34 2.61 2.35 2.71 3.03 3.6 1.51 1.74 1.95 1.85 2.13 2.39 2.14 2.48 2.77 No. 1 and 4.2 1.40 1.62 1.81 1.71 1.98 2.21 1.99 2.29 2.56 No. 2 4.8 1.31 1.51 1.69 1.60 1.85 2.07 1.86 2.14 2.40 5.4 1.23 1.42 1.59 1.51 1.74 1.95 1.75 2.02 2.26 6.0 1.17 1.35 1.51 1.43 1.65 1.85 1.66 1.92 2.14 2.4 2.22 2.70 2.91 2.64 3.31 3.70 2.98 3.78 4.29 3.0 1.85 2.35 2.70 2.21 2.79 3.31 2.50 3.14 3.78 3.6 1.61 2.02 2.43 1.92 2.40 2.89 2.18 2.71 3.24 Select 4.2 1.43 1.78 2.14 1.71 2.13 2.54 1.95 2.40 2.86 Structural 4.8 1.30 1.61 1.92 1.56 1.92 2.28 1.77 2.18 2.58 5.4 1.19 1.47 1.74 1.44 1.76 2.08 1.64 2.00 2.35 Hem – Fir 6.0 1.11 1.36 1.61 1.34 1.63 1.92 1.53 1.85 2.18 (includes Western Hemlock and Amabilis Fir) 2.4 1.94 2.24 2.51 2.37 2.74 3.06 2.75 3.18 3.56 3.0 1.74 2.00 2.24 2.12 2.45 2.74 2.46 2.84 3.18 3.6 1.58 1.83 2.05 1.92 2.24 2.50 2.18 2.60 2.90 No. 1 and 4.2 1.43 1.69 1.89 1.71 2.07 2.32 1.95 2.40 2.69 No. 2 4.8 1.30 1.58 1.77 1.56 1.92 2.17 1.77 2.18 2.51 5.4 1.19 1.47 1.67 1.44 1.76 2.04 1.64 2.00 2.35 6.0 1.11 1.36 1.58 1.34 1.63 1.92 1.53 1.85 2.18 Table 9.23.4.2.-J (Cont'd) Maximum Spans for Built-up Floor Beams Supporting Not More than Three Floors(1)(2) Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(3), 9.23.4.4.(3) and 9.23.8.1.(1) Maximum Span, m(5)(6) Supported Size of Built-up Beam, mm Commercial Designation Grade Length, m(3)(4) 3– 4– 5– 3– 4– 5– 3– 4– 5– 38 × 184 38 × 184 38 × 184 38 × 235 38 × 235 38 × 235 38 × 286 38 × 286 38 × 286 2.4 2.35 2.58 2.78 2.89 3.30 3.55 3.24 3.89 4.33 3.0 2.02 2.40 2.58 2.40 3.00 3.30 2.71 3.42 3.89 3.6 1.74 2.20 2.43 2.08 2.62 3.06 2.35 2.95 3.54 Select 4.2 1.55 1.94 2.31 1.85 2.31 2.77 2.10 2.61 3.12 Structural 4.8 1.40 1.74 2.09 1.68 2.08 2.48 1.91 2.35 2.80 Spruce – Pine – Fir 5.4 1.28 1.59 1.90 1.54 1.90 2.26 1.76 2.16 2.55 (includes Spruce (all species except Coast 6.0 1.19 1.47 1.74 1.44 1.76 2.08 1.64 2.00 2.35 Sitka Spruce), Jack Pine, 2.4 2.01 2.32 2.60 2.46 2.84 3.17 2.85 3.29 3.68 Lodgepole Pine, Balsam 3.0 1.80 2.08 2.32 2.20 2.54 2.84 2.55 2.95 3.29 Fir and Alpine Fir) 3.6 1.64 1.90 2.12 2.01 2.32 2.59 2.33 2.69 3.01 No. 1 and 4.2 1.52 1.75 1.96 1.85 2.15 2.40 2.10 2.49 2.78 No. 2 4.8 1.40 1.64 1.84 1.68 2.01 2.24 1.91 2.33 2.60 5.4 1.28 1.55 1.73 1.54 1.89 2.12 1.76 2.16 2.46 6.0 1.19 1.47 1.64 1.44 1.76 2.01 1.64 2.00 2.33 2.4 1.91 2.20 2.46 2.33 2.69 3.01 2.70 3.12 3.49 3.0 1.70 1.97 2.20 2.08 2.41 2.69 2.42 2.79 3.12 3.6 1.56 1.80 2.01 1.90 2.20 2.46 2.18 2.55 2.85 Select 4.2 1.43 1.66 1.86 1.71 2.03 2.27 1.95 2.36 2.64 Structural 4.8 1.30 1.56 1.74 1.56 1.90 2.13 1.77 2.18 2.47 Northern Species 5.4 1.19 1.47 1.64 1.44 1.76 2.01 1.64 2.00 2.33 (includes any Canadian 6.0 1.11 1.36 1.56 1.34 1.63 1.90 1.53 1.85 2.18 species covered by the NLGA Standard Grading 2.4 1.61 1.86 2.08 1.97 2.28 2.55 2.29 2.64 2.96 Rules) 3.0 1.44 1.67 1.86 1.76 2.04 2.28 2.05 2.36 2.64 3.6 1.32 1.52 1.70 1.61 1.86 2.08 1.87 2.16 2.41 No. 1 and 4.2 1.22 1.41 1.57 1.49 1.72 1.93 1.73 2.00 2.23 No. 2 4.8 1.14 1.32 1.47 1.40 1.61 1.80 1.62 1.87 2.09 5.4 1.08 1.24 1.39 1.32 1.52 1.70 1.53 1.76 1.97 6.0 1.02 1.18 1.32 1.25 1.44 1.61 1.45 1.67 1.87 Notes to Table 9.23.4.2.-J: (1) Beam spans apply only where the floors serve residential areas as described in Table 4.1.5.3., or the uniformly distributed live load on the floors does not exceed that specified for residential areas as described in Table 4.1.5.3. (2) When the floors have a concrete topping of not more than 51 mm, the spans must be multiplied by 0.8. (3) Supported length means half the sum of the joists spans on both sides of the beam. (4) Straight interpolation may be used for other supported lengths. (5) Spans are clear spans between supports. For total span, add two bearing lengths. (6) 3-ply beams with supported lengths greater than 4.2 m require minimum bearing length of 152 mm. All other beams require minimum bearing length of 114 mm. Table 9.23.4.2.-K Maximum Spans for Glue-Laminated Floor Beams – 20f-E Grade(1) Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(3), 9.23.4.4.(3) and 9.23.8.1.(1) Maximum Span, m(4)(5)(6)(7) Number of Storeys Supported Beam Width, mm Beam Depth, mm Supported Length, m(2)(3) 228 266 304 342 380 418 456 2.4 4.32 5.04 5.76 6.48 7.20 7.92 8.64 3.0 3.87 4.51 5.15 5.80 6.44 7.09 7.73 3.6 3.53 4.12 4.70 5.29 5.88 6.47 7.06 80 4.2 3.27 3.81 4.36 4.90 5.44 5.99 6.53 4.8 3.06 3.57 4.07 4.58 5.09 5.60 6.11 5.4 2.88 3.36 3.84 4.32 4.80 5.28 5.76 6.0 2.73 3.19 3.64 4.10 4.56 5.01 5.47 2.4 5.51 6.43 7.35 8.26 9.18 10.10 11.02 3.0 4.93 5.75 6.57 7.39 8.21 9.03 9.86 3.6 4.50 5.25 6.00 6.75 7.50 8.25 9.00 130 4.2 4.16 4.86 5.55 6.25 6.94 7.64 8.33 4.8 3.90 4.54 5.19 5.84 6.49 7.14 7.79 5.4 3.67 4.28 4.90 5.51 6.12 6.73 7.35 6.0 3.48 4.07 4.65 5.23 5.81 6.39 6.97 2.4 3.28 3.83 4.37 4.92 5.47 6.01 6.56 3.0 2.93 3.42 3.91 4.40 4.89 5.38 5.87 3.6 2.68 3.12 3.57 4.02 4.46 4.91 5.36 80 4.2 2.48 2.89 3.31 3.72 4.13 4.54 4.96 4.8 2.32 2.71 3.09 3.48 3.86 4.25 4.64 5.4 2.19 2.55 2.91 3.28 3.64 4.01 4.37 6.0 2.07 2.42 2.77 3.11 3.46 3.80 4.15 2.4 4.18 4.88 5.57 6.27 6.97 7.66 8.36 3.0 3.74 4.36 4.99 5.61 6.23 6.85 7.48 3.6 3.41 3.98 4.55 5.12 5.69 6.26 6.83 130 4.2 3.16 3.69 4.21 4.74 5.27 5.79 6.32 4.8 2.96 3.45 3.94 4.43 4.93 5.42 5.91 5.4 2.79 3.25 3.72 4.18 4.64 5.11 5.57 6.0 2.64 3.08 3.53 3.97 4.41 4.85 5.29 2.4 2.75 3.21 3.66 4.12 4.58 5.04 5.50 3.0 2.46 2.87 3.28 3.69 4.10 4.51 4.92 3.6 2.24 2.62 2.99 3.37 3.74 4.11 4.49 80 4.2 2.08 2.42 2.77 3.12 3.46 3.81 4.15 4.8 1.94 2.27 2.59 2.91 3.24 3.56 3.89 5.4 1.83 2.14 2.44 2.75 3.05 3.36 3.66 6.0 1.74 2.03 2.32 2.61 2.90 3.19 3.48 2.4 3.50 4.09 4.67 5.25 5.84 6.42 7.01 3.0 3.13 3.66 4.18 4.70 5.22 5.74 6.27 3.6 2.86 3.34 3.81 4.29 4.77 5.24 5.72 130 4.2 2.65 3.09 3.53 3.97 4.41 4.85 5.30 4.8 2.48 2.89 3.30 3.72 4.13 4.54 4.95 5.4 2.34 2.72 3.11 3.50 3.89 4.28 4.67 6.0 2.22 2.58 2.95 3.32 3.69 4.06 4.43 Notes to Table 9.23.4.2.-K: (1) Spans apply only where the floors serve residential areas as described in Table 4.1.5.3., or the uniformly distributed live load on the floor does not exceed that specified for residential areas as described in Table 4.1.5.3. (2) Supported length means half the sum of the joist spans on both sides of the beam. (3) Straight interpolation may be used for other supported lengths. (4) Spans are valid for glued-laminated timber conforming to CAN/CSA-O122 and CSA O177. (5) Spans are clear spans between supports. For total span, add two bearing lengths. (6) Provide a minimum bearing length of 89 mm. (Alternatively, the bearing length may be designed in accordance with Part 4.) (7) Top edge of beam assumed to be fully laterally supported by joists. Table 9.23.4.2.-L Maximum Spans for Built-up Ridge Beams and Lintels Supporting the Roof and Ceiling Only – No. 1 or No. 2 Grade Forming Part of Sentences 9.23.2.8.(1), 9.23.4.2.(4), 9.23.4.5.(1), 9.23.12.3.(1) and (3) and 9.23.14.10.(2) Maximum Span, m(1)(2)(3) Commercial Designation Beam or Lintel Size, mm Specified Snow Load, kPa 1.0 1.5 2.0 2.5 3.0 3 – 38 × 184 2.65 2.28 2.03 1.85 1.71 4 – 38 × 184 3.06 2.64 2.35 2.14 1.97 5 – 38 × 184 3.43 2.95 2.62 2.39 2.21 Douglas Fir – Larch 3 – 38 × 235 3.25 2.79 2.49 2.26 2.09 (includes Douglas Fir and 4 – 38 × 235 3.75 3.22 2.87 2.61 2.41 Western Larch) 5 – 38 × 235 4.19 3.60 3.21 2.92 2.70 3 – 38 × 286 3.77 3.24 2.88 2.62 2.43 4 – 38 × 286 4.35 3.74 3.33 3.03 2.80 5 – 38 × 286 4.86 4.18 3.72 3.39 3.13 3 – 38 × 184 2.78 2.39 2.13 1.94 1.79 4 – 38 × 184 3.21 2.76 2.46 2.24 2.07 5 – 38 × 184 3.59 3.09 2.75 2.50 2.31 Hem – Fir 3 – 38 × 235 3.40 2.93 2.61 2.37 2.19 (includes Western Hemlock 4 – 38 × 235 3.93 3.38 3.01 2.74 2.53 and Amabilis Fir) 5 – 38 × 235 4.39 3.78 3.36 3.06 2.83 3 – 38 × 286 3.95 3.40 3.02 2.75 2.54 4 – 38 × 286 4.56 3.92 3.49 3.18 2.94 5 – 38 × 286 5.10 4.38 3.90 3.55 3.28 3 – 38 × 184 2.88 2.48 2.21 2.01 1.86 4 – 38 × 184 3.30 2.86 2.55 2.32 2.14 5 – 38 × 184 3.55 3.10 2.82 2.59 2.40 Spruce – Pine – Fir (includes Spruce (all species 3 – 38 × 235 3.53 3.03 2.70 2.46 2.27 except Coast Sitka Spruce), 4 – 38 × 235 4.07 3.50 3.12 2.84 2.62 Jack Pine, Lodgepole Pine, 5 – 38 × 235 4.54 3.91 3.49 3.17 2.93 Balsam Fir and Alpine Fir) 3 – 38 × 286 4.09 3.52 3.13 2.85 2.63 4 – 38 × 286 4.72 4.06 3.62 3.29 3.04 5 – 38 × 286 5.28 4.54 4.04 3.68 3.40 Notes to Table 9.23.4.2.-L: (1) Beam and lintel spans are calculated based on a maximum supported length of 4.9 m. Spans may be increased by 5% for supported lengths of not more than 4.3 m, by 10% for supported lengths of not more than 3.7 m, and by 25% for supported lengths of not more than 2.4 m. (2) For ridge beams, supported length means half the sum of the rafter, joist or truss spans on both sides of the beam. For lintels, supported length means half the sum of truss, roof joist or rafter spans supported by the lintel plus the length of the overhang beyond the lintel. (3) Provide a minimum bearing length of 76 mm. Table 9.23.4.3.-A Maximum Spans for Steel Beams Supporting a Roof and One Floor in Dwelling Units Where Beams Support Exterior Stud Walls With Brick Veneer – 1.0 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3.(1) Maximum Span, m Roof Live Load, kPa 1.0 Supported Roof Length, m(1) 2.4 3.6 4.8 6.0 Supported Floor Length, m(2) 2.4 3.6 2.4 3.6 2.4 3.6 2.4 3.6 W 150 × 22 2.96 2.79 2.86 2.71 2.78 2.65 2.71 2.59 W 150 × 30 3.32 3.14 3.22 3.05 3.13 2.98 3.04 2.91 W 150 × 37 3.62 3.41 3.50 3.32 3.40 3.24 3.32 3.17 W 200 × 27 3.80 3.59 3.68 3.49 3.58 3.41 3.49 3.33 W 200 × 31 4.06 3.83 3.93 3.73 3.82 3.64 3.72 3.56 W 200 × 36 4.17 3.94 4.04 3.83 3.93 3.74 3.82 3.65 W 200 × 42 4.42 4.18 4.29 4.06 4.16 3.96 4.05 3.87 Steel Beam Section W 250 × 33 4.71 4.44 4.56 4.32 4.43 4.22 4.31 4.12 W 250 × 39 5.04 4.76 4.88 4.63 4.75 4.52 4.62 4.41 W 250 × 49 5.32 5.02 5.15 4.89 5.01 4.77 4.87 4.66 W 310 × 39 5.66 5.34 5.49 5.20 5.33 5.07 5.19 4.96 W 310 × 45 5.96 5.62 5.77 5.47 5.61 5.34 5.46 5.22 W 310 × 52 6.33 5.98 6.13 5.82 5.96 5.67 5.8 5.54 W 310 × 60 6.50 6.14 6.30 5.98 6.12 5.83 5.96 5.69 W 360 × 33 5.61 5.29 5.43 5.15 5.28 5.03 5.14 4.91 W 360 × 39 6.01 5.68 5.83 5.53 5.66 5.39 5.51 5.27 W 360 × 45 6.38 6.03 6.19 5.87 6.01 5.72 5.85 5.59 W 360 × 51 6.70 6.32 6.49 6.16 6.31 6.00 6.14 5.87 W 360 × 57 7.00 6.61 6.78 6.43 6.59 6.28 6.42 6.13 Notes to Table 9.23.4.3.-A: (1) Supported roof length means half the sum of the roof framing spans on both sides of the beam. (2) Supported floor length means half the sum of the floor framing spans on both sides of the beam. Table 9.23.4.3.-B Maximum Spans for Steel Beams Supporting a Roof and One Floor in Dwelling Units Where Beams Support Interior Stud Walls or Exterior Stud Walls With Siding – 1.0 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3.(1) Maximum Span, m Roof Live Load, kPa 1.0 Supported Roof Length, m(1) 2.4 3.6 4.8 6.0 Supported Floor Length, m(2) 2.4 3.6 2.4 3.6 2.4 3.6 2.4 3.6 W 150 × 22 4.20 3.82 3.98 3.67 3.81 3.51 3.66 3.35 W 150 × 30 4.72 4.30 4.48 4.13 4.28 3.98 4.11 3.85 W 150 × 37 5.14 4.68 4.88 4.49 4.66 4.33 4.48 4.19 W 200 × 27 5.41 4.92 5.13 4.72 4.90 4.56 4.71 4.41 Steel Beam Section W 200 × 31 5.77 5.25 5.48 5.04 5.23 4.86 5.02 4.71 W 200 × 36 5.93 5.40 5.63 5.18 5.38 5.00 5.16 4.84 W 200 × 42 6.29 5.72 5.97 5.50 5.70 5.30 5.47 5.13 W 250 × 33 6.69 6.09 6.35 5.85 6.06 5.64 5.82 5.45 W 250 × 39 7.17 6.52 6.80 6.26 6.49 6.04 6.24 5.85 W 250 × 49 7.56 6.88 7.17 6.61 6.85 6.37 6.58 6.17 W 310 × 39 8.05 7.32 7.63 7.03 7.29 6.78 7.01 6.56 W 310 × 45 8.47 7.71 8.03 7.40 7.68 7.14 7.37 6.91 Notes to Table 9.23.4.3.-B: (1) Supported roof length means half the sum of the roof framing spans on both sides of the beam. (2) Supported floor length means half the sum of the floor framing spans on both sides of the beam. Table 9.23.4.3.-C Maximum Spans for Steel Beams Supporting a Roof and One Floor in Dwelling Units Where Beams Support Exterior Stud Walls With Brick Veneer – 1.5 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3.(1) Maximum Span, m Roof Live Load, kPa 1.5 Supported Roof Length, m(1) 2.4 3.6 4.8 6.0 Supported Floor Length, m(2) 2.4 3.6 2.4 3.6 2.4 3.6 2.4 3.6 W 150 × 22 2.86 2.71 2.74 2.62 2.64 2.53 2.55 2.46 W 150 × 30 3.22 3.05 3.08 2.94 2.97 2.85 2.87 2.76 W 150 × 37 3.50 3.32 3.36 3.20 3.23 3.10 3.13 3.01 W 200 × 27 3.68 3.49 3.53 3.37 3.40 3.26 3.29 3.16 W 200 × 31 3.93 3.73 3.77 3.60 3.63 3.48 3.51 3.38 W 200 × 36 4.04 3.83 3.88 3.70 3.73 3.58 3.61 3.47 W 200 × 42 4.29 4.06 4.11 3.92 3.96 3.79 3.82 3.68 Steel Beam Section W 250 × 33 4.56 4.32 4.37 4.17 4.21 4.03 4.07 3.91 W 250 × 39 4.88 4.63 4.68 4.47 4.51 4.32 4.36 4.19 W 250 × 49 5.15 4.89 4.94 4.71 4.76 4.56 4.60 4.42 W 310 × 39 5.49 5.20 5.26 5.01 5.06 4.85 4.89 4.71 W 310 × 45 5.77 5.47 5.53 5.28 5.33 5.11 5.15 4.95 W 310 × 52 6.13 5.82 5.88 5.61 5.66 5.43 5.47 5.26 W 310 × 60 6.30 5.98 6.04 5.76 5.81 5.57 5.62 5.41 W 360 × 33 5.43 5.15 5.21 4.97 5.01 4.81 4.85 4.66 W 360 × 39 5.83 5.53 5.58 5.33 5.38 5.15 5.20 5.00 W 360 × 45 6.19 5.87 5.93 5.65 5.71 5.47 5.52 5.31 W 360 × 51 6.49 6.16 6.22 5.93 5.99 5.74 5.79 5.57 W 360 × 57 6.78 6.43 6.50 6.20 6.26 6.00 6.05 5.82 Notes to Table 9.23.4.3.-C: (1) Supported roof length means half the sum of the roof framing spans on both sides of the beam. (2) Supported floor length means half the sum of the floor framing spans on both sides of the beam. Table 9.23.4.3.-D Maximum Spans for Steel Beams Supporting a Roof and One Floor in Dwelling Units Where Beams Support Interior Stud Walls or Exterior Stud Walls With Siding – 1.5 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3.(1) Maximum Span, m Roof Live Load, kPa 1.5 Supported Roof Length, m(1) 2.4 3.6 4.8 6.0 Supported Floor Length, m(2) 2.4 3.6 2.4 3.6 2.4 3.6 2.4 3.6 W 150 × 22 3.98 3.67 3.73 3.48 3.53 3.30 3.36 3.12 W 150 × 30 4.48 4.13 4.19 3.91 3.97 3.74 3.78 3.59 W 150 × 37 4.88 4.49 4.56 4.26 4.32 4.07 4.12 3.91 W 200 × 27 5.13 4.72 4.80 4.48 4.54 4.28 4.33 4.11 Steel Beam Section W 200 × 31 5.48 5.04 5.12 4.78 4.85 4.57 4.62 4.39 W 200 × 36 5.63 5.18 5.27 4.92 4.98 4.70 4.75 4.51 W 200 × 42 5.97 5.50 5.58 5.21 5.28 4.98 5.04 4.78 W 250 × 33 6.35 5.85 5.94 5.54 5.62 5.30 5.36 5.09 W 250 × 39 6.80 6.26 6.36 5.94 6.02 5.67 5.74 5.45 W 250 × 49 7.17 6.61 6.71 6.27 6.35 5.99 6.06 5.75 W 310 × 39 7.63 7.03 7.14 6.67 6.76 6.37 6.45 6.12 W 310 × 45 8.03 7.40 7.52 7.02 7.11 6.71 6.78 6.44 Notes to Table 9.23.4.3.-D: (1) Supported roof length means half the sum of the roof framing spans on both sides of the beam. (2) Supported floor length means half the sum of the floor framing spans on both sides of the beam. Table 9.23.4.3.-E Maximum Spans for Steel Beams Supporting a Roof and One Floor in Dwelling Units Where Beams Support Exterior Stud Walls With Brick Veneer – 2.0 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3.(1) Maximum Span, m Roof Live Load, kPa 2.0 Supported Roof Length, m(1) 2.4 3.6 4.8 6.0 Supported Floor Length, m(2) 2.4 3.6 2.4 3.6 2.4 3.6 2.4 3.6 W 150 × 22 2.78 2.65 2.64 2.53 2.53 2.43 2.43 2.35 W 150 × 30 3.13 2.98 2.97 2.85 2.84 2.74 2.73 2.64 W 150 × 37 3.40 3.24 3.23 3.10 3.09 2.98 2.97 2.88 W 200 × 27 3.58 3.41 3.40 3.26 3.25 3.13 3.13 3.02 W 200 × 31 3.82 3.64 3.63 3.48 3.47 3.34 3.34 3.23 W 200 × 36 3.93 3.74 3.73 3.58 3.57 3.44 3.43 3.32 W 200 × 42 4.16 3.96 3.96 3.79 3.78 3.64 3.64 3.52 Steel Beam Section W 250 × 33 4.43 4.22 4.21 4.03 4.02 3.88 3.87 3.74 W 250 × 39 4.75 4.52 4.51 4.32 4.31 4.15 4.15 4.01 W 250 × 49 5.01 4.77 4.76 4.56 4.55 4.38 4.37 4.23 W 310 × 39 5.33 5.07 5.06 4.85 4.84 4.66 4.65 4.50 W 310 × 45 5.61 5.34 5.33 5.11 5.10 4.91 4.90 4.74 W 310 × 52 5.96 5.67 5.66 5.43 5.41 5.21 5.21 5.03 W 310 × 60 6.12 5.83 5.81 5.57 5.56 5.36 5.35 5.17 W 360 × 33 5.28 5.03 5.01 4.81 4.80 4.62 4.61 4.46 W 360 × 39 5.66 5.39 5.38 5.15 5.14 4.95 4.94 4.78 W 360 × 45 6.01 5.72 5.71 5.47 5.46 5.26 5.25 5.08 W 360 × 51 6.31 6.00 5.99 5.74 5.73 5.52 5.51 5.33 W 360 × 57 6.59 6.28 6.26 6.00 5.99 5.77 5.76 5.57 Notes to Table 9.23.4.3.-E: (1) Supported roof length means half the sum of the roof framing spans on both sides of the beam. (2) Supported floor length means half the sum of the floor framing spans on both sides of the beam. Table 9.23.4.3.-F Maximum Spans for Steel Beams Supporting a Roof and One Floor in Dwelling Units Where Beams Support Interior Stud Walls or Exterior Stud Walls With Siding – 2.0 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3.(1) Maximum Span, m Roof Live Load, kPa 2.0 Supported Roof Length, m(1) 2.4 3.6 4.8 6.0 Supported Floor Length, m(2) 2.4 3.6 2.4 3.6 2.4 3.6 2.4 3.6 W 150 × 22 3.81 3.54 3.53 3.33 3.32 3.13 3.15 2.94 W 150 × 30 4.28 3.98 3.97 3.74 3.73 3.55 3.54 3.39 W 150 × 37 4.66 4.33 4.32 4.07 4.06 3.86 3.85 3.69 W 200 × 27 4.90 4.56 4.54 4.28 4.27 4.06 4.05 3.88 Steel Beam Section W 200 × 31 5.23 4.86 4.85 4.57 4.56 4.34 4.32 4.14 W 200 × 36 5.38 5.00 4.98 4.70 4.68 4.46 4.45 4.26 W 200 × 42 5.70 5.30 5.28 4.98 4.96 4.72 4.71 4.51 W 250 × 33 6.06 5.64 5.62 5.30 5.28 5.03 5.01 4.80 W 250 × 39 6.49 6.04 6.02 5.67 5.66 5.38 5.37 5.14 W 250 × 49 6.85 6.37 6.35 5.99 5.97 5.68 5.67 5.43 W 310 × 39 7.29 6.78 6.76 6.37 6.35 6.04 6.03 5.77 W 310 × 45 7.68 7.14 7.11 6.71 6.69 6.36 6.35 6.08 Notes to Table 9.23.4.3.-F: (1) Supported roof length means half the sum of the roof framing spans on both sides of the beam. (2) Supported floor length means half the sum of the floor framing spans on both sides of the beam. Table 9.23.4.3.-G Maximum Spans for Steel Beams Supporting a Roof and One Floor in Dwelling Units Where Beams Support Exterior Stud Walls With Brick Veneer – 2.5 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3.(1) Maximum Span, m Roof Live Load, kPa 2.5 Supported Roof Length, m(1) 2.4 3.6 4.8 6.0 Supported Floor Length, m(2) 2.4 3.6 2.4 3.6 2.4 3.6 2.4 3.6 W 150 × 22 2.71 2.59 2.55 2.46 2.43 2.35 2.33 2.26 W 150 × 30 3.04 2.91 2.87 2.76 2.73 2.64 2.62 2.54 W 150 × 37 3.32 3.17 3.13 3.01 2.97 2.88 2.85 2.77 W 200 × 27 3.49 3.33 3.29 3.16 3.13 3.02 2.99 2.91 W 200 × 31 3.72 3.56 3.51 3.38 3.34 3.23 3.20 3.10 W 200 × 36 3.82 3.65 3.61 3.47 3.43 3.32 3.29 3.19 W 200 × 42 4.05 3.87 3.82 3.68 3.64 3.52 3.48 3.38 Steel Beam Section W 250 × 33 4.31 4.12 4.07 3.91 3.87 3.74 3.71 3.60 W 250 × 39 4.62 4.41 4.36 4.19 4.15 4.01 3.97 3.85 W 250 × 49 4.87 4.66 4.60 4.42 4.37 4.23 4.19 4.07 W 310 × 39 5.19 4.96 4.89 4.71 4.65 4.50 4.46 4.33 W 310 × 45 5.46 5.22 5.15 4.95 4.90 4.74 4.69 4.55 W 310 × 52 5.80 5.54 5.47 5.26 5.21 5.03 4.98 4.84 W 310 × 60 5.96 5.69 5.62 5.41 5.35 5.17 5.12 4.97 W 360 × 33 5.14 4.91 4.85 4.66 4.61 4.46 4.42 4.29 W 360 × 39 5.51 5.27 5.20 5.00 4.94 4.78 4.73 4.60 W 360 × 45 5.85 5.59 5.52 5.31 5.25 5.08 5.03 4.88 W 360 × 51 6.14 5.87 5.79 5.57 5.51 5.33 5.27 5.12 W 360 × 57 6.42 6.13 6.05 5.82 5.76 5.57 5.51 5.35 Notes to Table 9.23.4.3.-G: (1) Supported roof length means half the sum of the roof framing spans on both sides of the beam. (2) Supported floor length means half the sum of the floor framing spans on both sides of the beam. Table 9.23.4.3.-H Maximum Spans for Steel Beams Supporting a Roof and One Floor in Dwelling Units Where Beams Support Interior Stud Walls or Exterior Stud Walls With Siding – 2.5 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3.(1) Maximum Span, m Roof Live Load, kPa 2.5 Supported Roof Length, m(1) 2.4 3.6 4.8 6.0 Supported Floor Length, m(2) 2.4 3.6 2.4 3.6 2.4 3.6 2.4 3.6 W 150 × 22 3.66 3.43 3.36 3.19 3.15 2.98 2.98 2.79 W 150 × 30 4.11 3.85 3.78 3.59 3.54 3.39 3.35 3.23 W 150 × 37 4.48 4.19 4.12 3.91 3.85 3.69 3.64 3.51 W 200 × 27 4.71 4.41 4.33 4.11 4.05 3.88 3.83 3.69 Steel Beam Section W 200 × 31 5.02 4.71 4.62 4.39 4.32 4.14 4.09 3.94 W 200 × 36 5.16 4.84 4.75 4.51 4.45 4.26 4.21 4.05 W 200 × 42 5.47 5.13 5.04 4.78 4.71 4.51 4.46 4.30 W 250 × 33 5.82 5.46 5.36 5.09 5.01 4.80 4.74 4.54 W 250 × 39 6.24 5.85 5.74 5.45 5.37 5.14 5.08 4.90 W 250 × 49 6.58 6.17 6.06 5.75 5.67 5.43 5.36 5.17 W 310 × 39 7.01 6.56 6.45 6.12 6.03 5.78 5.70 5.47 W 310 × 45 7.37 6.91 6.78 6.44 6.35 6.08 6.00 5.79 Notes to Table 9.23.4.3.-H: (1) Supported roof length means half the sum of the roof framing spans on both sides of the beam. (2) Supported floor length means half the sum of the floor framing spans on both sides of the beam. Table 9.23.4.3-I Maximum Spans for Steel Beams Supporting a Roof and One Floor in Dwelling Units Where Beams Support Exterior Stud Walls With Brick Veneer – 3.0 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3.(1) Maximum Span, m Roof Live Load, kPa 3.0 Supported Roof Length, m(1) 2.4 3.6 4.8 6.0 Supported Floor Length, m(2) 2.4 3.6 2.4 3.6 2.4 3.6 2.4 3.6 W 150 × 22 2.64 2.53 2.48 2.39 2.35 2.28 2.24 2.18 W 150 × 30 2.97 2.85 2.78 2.69 2.64 2.56 2.52 2.45 W 150 × 37 3.23 3.10 3.03 2.93 2.87 2.79 2.74 2.67 W 200 × 27 3.40 3.26 3.19 3.08 3.02 2.93 2.88 2.81 W 200 × 31 3.63 3.48 3.40 3.28 3.22 3.13 3.08 3.00 W 200 × 36 3.73 3.58 3.50 3.38 3.31 3.21 3.16 3.08 W 200 × 42 3.96 3.79 3.71 3.58 3.51 3.41 3.35 3.26 Steel Beam Section W 250 × 33 4.21 4.03 3.94 3.81 3.74 3.62 3.57 3.47 W 250 × 39 4.51 4.32 4.23 4.08 4.00 3.88 3.82 3.72 W 250 × 49 4.76 4.56 4.46 4.30 4.22 4.10 4.03 3.93 W 310 × 39 5.06 4.85 4.74 4.58 4.49 4.36 4.29 4.18 W 310 × 45 5.33 5.11 4.99 4.82 4.73 4.59 4.51 4.40 W 310 × 52 5.66 5.43 5.31 5.12 5.03 4.88 4.80 4.67 W 310 × 60 5.81 5.57 5.45 5.26 5.16 5.01 4.93 4.80 W 360 × 33 5.01 4.81 4.70 4.54 4.45 4.32 4.25 4.14 W 360 × 39 5.38 5.15 5.04 4.86 4.77 4.63 4.56 4.44 W 360 × 45 5.71 5.47 5.35 5.16 5.07 4.92 4.84 4.71 W 360 × 51 5.99 5.74 5.61 5.42 5.32 5.16 5.08 4.94 W 360 × 57 6.26 6.00 5.87 5.66 5.56 5.39 5.31 5.17 Notes to Table 9.23.4.3-I: (1) Supported roof length means half the sum of the roof framing spans on both sides of the beam. (2) Supported floor length means half the sum of the floor framing spans on both sides of the beam. Table 9.23.4.3-J Maximum Spans for Steel Beams Supporting a Roof and One Floor in Dwelling Units Where Beams Support Interior Stud Walls or Exterior Stud Walls With Siding – 3.0 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3.(1) Maximum Span, m Roof Live Load, kPa 3.0 Supported Roof Length, m(1) 2.4 3.6 4.8 6.0 Supported Floor Length, m(2) 2.4 3.6 2.4 3.6 2.4 3.6 2.4 3.6 W 150 × 22 3.53 3.33 3.23 3.08 3.01 2.85 2.83 2.66 W 150 × 30 3.97 3.74 3.63 3.47 3.38 3.26 3.19 3.09 W 150 × 37 4.32 4.07 3.95 3.77 3.68 3.55 3.48 3.37 W 200 × 27 4.54 4.28 4.15 3.97 3.87 3.73 3.65 3.52 Steel Beam Section W 200 × 31 4.85 4.57 4.43 4.23 4.13 3.98 3.90 3.78 W 200 × 36 4.98 4.70 4.56 4.35 4.25 4.09 4.01 3.88 W 200 × 42 5.28 4.98 4.83 4.61 4.50 4.34 4.25 4.12 W 250 × 33 5.62 5.30 5.14 4.91 4.79 4.61 4.52 4.33 W 250 × 39 6.02 5.67 5.51 5.26 5.13 4.94 4.84 4.69 W 250 × 49 6.35 5.99 5.81 5.55 5.42 5.21 5.11 4.95 W 310 × 39 6.76 6.37 6.18 5.90 5.76 5.55 5.44 5.21 W 310 × 45 7.11 6.71 6.51 6.21 6.07 5.84 5.72 5.54 Notes to Table 9.23.4.3-J: (1) Supported roof length means half the sum of the roof framing spans on both sides of the beam. (2) Supported floor length means half the sum of the floor framing spans on both sides of the beam. Table 9.23.10.1.-A Sizes for Spruce-Pine-Fir No. 2 Grade Exterior Wall Studs With Brick Veneer(1)(2) Forming Part of Sentence 9.23.10.1.(2) Stud Size and Spacing Hourly Wind Pressure (1/50), kPa 0.40 0.45 0.50 0.60 Specified Roof Stud Supported Roof Length, m Supported Roof Length, m Supported Roof Length, m Supported Roof Length, m Snow Load, kPa Length, m 3.0 6.0 3.0 6.0 3.0 6.0 3.0 6.0 3.8 A A A A A A A A 4.2 A A A A B B B B 4.6 B B B B C C C C 1.0 5.0 C C C C C C D D 5.3 C C C C D D D D 5.6 C C D D D D 3.8 A A A A A A A A 4.2 A A A A B B B B 4.6 B B B B C C C C 1.5 5.0 C C C C C C D D 5.3 C C C C D D D D 5.6 C C D D D D 3.8 A A A A A A A A 4.2 A A A A B B B B 4.6 B B B B C C C C 2.0 5.0 C C C C C C D D 5.3 C C C C D D D D 5.6 C C D D D D 3.8 A A A A A A A A 4.2 A A A A B B B B 4.6 B B B B C C C C 2.5 5.0 C C C C C C D D 5.3 C C C C D D D D 5.6 C C D D D D 3.8 A A A A A A A A 4.2 A A A A B B B B 4.6 B B B B C C C C 3.0 5.0 C C C C C C D D 5.3 C C C C D D D D 5.6 C C D D D D Legend - Stud Size and Spacing A = 38 × 140 mm at 400 mm on centre C = two 38 × 140 mm studs at 400 mm on centre B = 38 × 140 mm at 300 mm on centre D = two 38 × 140 mm studs at 300 mm on centre Notes to Table 9.23.10.1.-A: (1) A roof dead load of 0.5 kPa has been assumed. The Table does not apply where the stud supports additional loads from heavy roofing materials such as concrete tiles or clay roofing tiles. (2) Wall construction shall conform to the requirements of Sentence 9.23.10.1.(2). Table 9.23.10.1.-B Sizes for Spruce-Pine-Fir No. 2 Grade Exterior Wall Studs With Siding(1)(2) Forming Part of Sentence 9.23.10.1.(2) Stud Size and Spacing Hourly Wind Pressure (1/50), kPa 0.40 0.45 0.50 0.60 Specified Roof Stud Length, Supported Roof Length, m Supported Roof Length, m Supported Roof Length, m Supported Roof Length, m Snow Load, kPa m 3.0 6.0 3.0 6.0 3.0 6.0 3.0 6.0 3.8 A A A A A A A A 4.2 A A A A A A A A 4.6 A A A A A A A A 1.0 5.0 A A A A A A B B 5.3 A A A A B B B B 5.6 A A B B B B C C 3.8 A A A A A A A A 4.2 A A A A A A A A 4.6 A A A A A A A A 1.5 5.0 A A A A A A B B 5.3 A A A A B B B B 5.6 A A B B B B C C 3.8 A A A A A A A A 4.2 A A A A A A A A 4.6 A A A A A A A A 2.0 5.0 A A A A A A B B 5.3 A A A A B B B B 5.6 A A B B B B C C 3.8 A A A A A A A A 4.2 A A A A A A A A 4.6 A A A A A A A A 2.5 5.0 A A A A A A B B 5.3 A A A A B B B B 5.6 A B B B B B C C 3.8 A A A A A A A A 4.2 A A A A A A A A 4.6 A A A A A A A A 3.0 5.0 A A A A A A B B 5.3 A B A B B B B B 5.6 A B B B B B C C Legend - Stud Size and Spacing A = 38 × 140 mm at 400 mm on centre C = two 38 × 140 mm studs at 400 mm on centre B = 38 × 140 mm at 300 mm on centre D = two 38 × 140 mm studs at 300 mm on centre Notes to Table 9.23.10.1.-B: (1) A roof dead load of 0.5 kPa has been assumed. The Table does not apply where the stud supports additional loads from heavy roofing materials such as concrete tiles or clay roofing tiles. (2) Wall construction shall conform to the requirements of Sentence 9.23.10.1.(2). Table 9.23.10.1.-C Sizes for Northern Species No. 2 Grade Exterior Wall Studs With Brick Veneer(1)(2) Forming Part of Sentence 9.23.10.1.(2) Stud Size and Spacing Hourly Wind Pressure (1/50), kPa 0.40 0.45 0.50 0.60 Specified Roof Snow Stud Supported Roof Length, m Supported Roof Length, m Supported Roof Length, m Supported Roof Length, m Load, kPa Length, m 3.0 6.0 3.0 6.0 3.0 6.0 3.0 6.0 3.8 A A A A B B B B 4.2 B B B B C C C C 4.6 C C C C C C D D 1.0 5.0 C C D D D D 5.3 D D D D 5.6 3.8 A A A A B B B B 4.2 B B B B C C C C 4.6 C C C C C C D D 1.5 5.0 C C D D D D 5.3 D D D D 5.6 3.8 A A A A B B B B 4.2 B B B B C C C C 4.6 C C C C C C D D 2.0 5.0 C C D D D D 5.3 D D D D 5.6 3.8 A A A A B B B B 4.2 B B B B C C C C 4.6 C C C C C C D D 2.5 5.0 C C D D D D 5.3 D D D D 5.6 3.8 A A A A B B B B 4.2 B B B B C C C C 4.6 C C C C C C D D 3.0 5.0 C C D D D D 5.3 D D D D 5.6 Legend - Stud Size and Spacing A = 38 × 140 mm at 400 mm on centre C = two 38 × 140 mm studs at 400 mm on centre B = 38 × 140 mm at 300 mm on centre D = two 38 × 140 mm studs at 300 mm on centre Notes to Table 9.23.10.1.-C: (1) A roof dead load of 0.5 kPa has been assumed. The Table does not apply where the stud supports additional loads from heavy roofing materials such as concrete tiles or clay roofing tiles. (2) Wall construction shall conform to the requirements of Sentence 9.23.10.1.(2). Table 9.23.10.1.-D Sizes for Northern Species No. 2 Grade Exterior Wall Studs With Siding(1)(2) Forming Part of Sentence 9.23.10.1.(2) Stud Size and Spacing Hourly Wind Pressure (1/50), kPa 0.40 0.45 0.50 0.60 Specified Roof Snow Stud Supported Roof Length, m Supported Roof Length, m Supported Roof Length, m Supported Roof Length, m Load, kPa Length, m 3.0 6.0 3.0 6.0 3.0 6.0 3.0 6.0 3.8 A A A A A A A A 4.2 A A A A A A A A 4.6 A A A A A A B B 1.0 5.0 A A B B B B C C 5.3 B B B B C C C C 5.6 C C C C C C D D 3.8 A A A A A A A A 4.2 A A A A A A A A 4.6 A A A A A A B B 1.5 5.0 A A B B B B C C 5.3 B B B B C C C C 5.6 C C C C C C D D 3.8 A A A A A A A A 4.2 A A A A A A A A 4.6 A A A A A A B B 2.0 5.0 A A B B B B C C 5.3 B B B B C C C C 5.6 C C C C C C D D 3.8 A A A A A A A A 4.2 A A A A A A A A 4.6 A A A A A A B B 2.5 5.0 A B B B B B C C 5.3 B B B B C C C C 5.6 C C C C C C D D 3.8 A A A A A A A A 4.2 A A A A A A A A 4.6 A B A B A B B B 3.0 5.0 A B B B B B C C 5.3 B C B C C C C C 5.6 C C C C C C D D Legend - Stud Size and Spacing A = 38 × 140 mm at 400 mm on centre C = two 38 × 140 mm studs at 400 mm on centre B = 38 × 140 mm at 300 mm on centre D = two 38 × 140 mm studs at 300 mm on centre Notes to Table 9.23.10.1.-D: (1) A roof dead load of 0.5 kPa has been assumed. The Table does not apply where the stud supports additional loads from heavy roofing materials such as concrete tiles or clay roofing tiles. (2) Wall construction shall conform to the requirements of Sentence 9.23.10.1.(2). Table 9.23.10.7.-A Minimum Number of 38 × 89 mm Spruce-Pine-Fir Stud Posts in Exterior Stud Walls Supporting Girder Trusses and Roof Beams (1)(2)(3) Forming Part of Sentence 9.23.10.7.(2) Minimum Number of Studs Specified Roof Snow Load, kPa Span of Stud 1.0 1.5 2.0 2.5 3.0 Beam or Height, Girder, Supported Length, m Supported Length, m Supported Length, m Supported Length, m Supported Length, m m m 2.4 3.6 4.8 6.0 2.4 3.6 4.8 6.0 2.4 3.6 4.8 6.0 2.4 3.6 4.8 6.0 2.4 3.6 4.8 6.0 2.4 1 1 2 2 1 2 2 2 1 2 2 3 2 2 3 3 2 2 3 3 3.6 1 2 2 2 2 2 3 3 2 2 3 4 2 3 4 4 2 3 4 5 4.8 2 2 3 3 2 3 3 4 2 3 4 5 3 4 5 3 4 5 6.0 2 2 3 4 2 3 4 5 3 4 5 3 4 3 5 2.4 7.2 2 3 4 4 3 4 5 3 4 4 5 4 8.4 2 3 4 5 3 4 5 3 5 4 5 9.6 3 4 5 3 5 4 5 5 10.8 3 4 5 4 5 4 5 12.0 3 4 4 5 2.4 1 2 2 2 2 2 3 3 2 2 3 4 2 3 4 4 2 3 4 5 3.6 2 2 3 3 2 3 4 4 2 3 4 5 3 4 5 3 4 4.8 2 3 4 4 3 4 5 3 4 4 5 4 6.0 2 3 4 5 3 4 4 5 4 5 3.0 7.2 3 4 5 4 5 4 5 8.4 3 4 4 5 9.6 4 5 5 10.8 4 5 12.0 4 Notes to Table 9.23.10.7.-A: (1) A roof dead load of 0.62 kPa has been assumed. (2) Roof beams require a minimum bearing length of 89 mm. (3) Girder trusses require a minimum bearing length of 89 mm unless otherwise specified by the truss manufacturer. Table 9.23.10.7.-B Minimum Number of 38 × 140 mm Spruce-Pine-Fir Stud Posts in Exterior Stud Walls Supporting Girder Trusses and Roof Beams (1)(2)(3) Forming Part of Sentence 9.23.10.7.(2) Minimum Number of Studs Specified Roof Snow Load, kPa Span of Stud 1.0 1.5 2.0 2.5 3.0 Beam or Height, Girder, Supported Length, m Supported Length, m Supported Length, m Supported Length, m Supported Length, m m m 2.4 3.6 4.8 6.0 2.4 3.6 4.8 6.0 2.4 3.6 4.8 6.0 2.4 3.6 4.8 6.0 2.4 3.6 4.8 6.0 2.4 1 1 1 1 1 1 1 1 1 1 1 2 1 1 2 2 1 1 2 2 3.6 1 1 1 1 1 1 2 2 1 1 2 2 1 2 2 2 1 2 2 3 4.8 1 1 2 2 1 2 2 2 1 2 2 3 2 2 3 3 2 2 3 4 6.0 1 1 2 2 1 2 2 3 2 2 3 3 2 2 3 4 2 3 4 4 3.0 7.2 1 2 2 2 2 2 3 3 2 2 3 4 2 3 4 4 2 3 4 5 8.4 1 2 2 3 2 2 3 4 2 3 4 4 2 3 4 5 3 4 5 9.6 2 2 3 3 2 3 3 4 2 3 4 5 3 4 5 3 4 5 10.8 2 2 3 3 2 3 4 4 2 3 4 5 3 4 5 3 5 12.0 2 2 3 4 2 3 4 5 3 4 5 3 4 4 5 2.4 1 1 1 1 1 1 1 2 1 1 2 2 1 1 2 2 1 2 2 2 3.6 1 1 1 2 1 1 2 2 1 2 2 3 1 2 2 3 2 2 3 3 4.8 1 1 2 2 1 2 2 3 2 2 3 3 2 2 3 4 2 3 4 4 6.0 1 2 2 3 2 2 3 3 2 3 3 4 2 3 4 5 2 3 4 5 3.6 7.2 1 2 2 3 2 2 3 4 2 3 4 5 2 3 4 5 3 4 5 8.4 2 2 3 3 2 3 4 4 2 3 4 5 3 4 5 3 4 9.6 2 2 3 4 2 3 4 5 3 4 5 3 4 4 5 10.8 2 3 3 4 2 3 4 5 3 4 5 3 5 4 12.0 2 3 4 5 3 4 5 3 5 4 5 4 Notes to Table 9.23.10.7.-B: (1) A roof dead load of 0.62 kPa has been assumed. (2) Roof beams require a minimum bearing length of 140 mm. (3) Girder trusses require a minimum bearing length of 140 mm unless otherwise specified by the truss manufacturer. Table 9.23.10.7.-C Minimum Number of 38 × 89 mm Northern Species Stud Posts in Exterior Stud Walls Supporting Girder Trusses and Roof Beams (1)(2)(3) Forming Part of Sentence 9.23.10.7.(2) Minimum Number of Studs Span of Specified Roof Snow Load, kPa Stud Beam 1.0 1.5 2.0 2.5 3.0 Height, or m Girder, Supported Length, m Supported Length, m Supported Length, m Supported Length, m Supported Length, m m 2.4 3.6 4.8 6.0 2.4 3.6 4.8 6.0 2.4 3.6 4.8 6.0 2.4 3.6 4.8 6.0 2.4 3.6 4.8 6.0 2.4 1 2 2 2 2 2 3 3 2 2 3 4 2 3 4 4 2 3 4 5 3.6 2 2 3 3 2 3 4 4 2 3 4 5 3 4 5 3 4 4.8 2 3 4 4 3 4 5 3 4 4 5 4 6.0 2 3 4 5 3 4 4 5 4 5 2.4 7.2 3 4 5 4 5 4 5 8.4 3 4 4 5 9.6 4 5 5 10.8 4 5 12.0 4 2.4 2 2 3 3 2 3 3 4 2 3 4 5 3 4 5 3 4 3.6 2 3 4 5 3 4 5 3 5 4 5 4 4.8 3 4 5 3 5 4 5 6.0 3 5 4 5 3.0 7.2 4 5 5 8.4 4 9.6 5 10.8 5 12.0 Notes to Table 9.23.10.7.-C: (1) A roof dead load of 0.62 kPa has been assumed. (2) Roof beams require a minimum bearing length of 89 mm. (3) Girder trusses require a minimum bearing length of 89 mm unless otherwise specified by the truss manufacturer. Table 9.23.10.7.-D Minimum Number of 38 × 140 mm Northern Species Stud Posts in Exterior Stud Walls Supporting Girder Trusses and Roof Beams(1)(2)(3) Forming Part of Sentence 9.23.10.7.(2) Minimum Number of Studs Specified Roof Snow Load, kPa Span of 1.0 1.5 2.0 2.5 3.0 Stud Beam or Height, m Girder, m Supported Length, m Supported Length, m Supported Length, m Supported Length, m Supported Length, m 2.4 3.6 4.8 6.0 2.4 3.6 4.8 6.0 2.4 3.6 4.8 6.0 2.4 3.6 4.8 6.0 2.4 3.6 4.8 6.0 2.4 1 1 1 1 1 1 2 2 1 1 2 2 1 2 2 2 1 2 2 3 3.6 1 1 2 2 1 2 2 2 1 2 2 3 2 2 3 3 2 3 3 4 4.8 1 2 2 2 2 2 3 3 2 2 3 4 2 3 4 4 2 3 4 5 6.0 1 2 2 3 2 2 3 4 2 3 4 5 2 3 4 5 3 4 5 3.0 7.2 2 2 3 3 2 3 4 4 2 3 4 5 3 4 5 3 5 8.4 2 3 3 4 2 3 4 5 3 4 5 3 5 4 5 9.6 2 3 4 4 3 4 5 3 4 4 5 4 10.8 2 3 4 5 3 4 5 3 5 4 5 12.0 2 3 4 5 3 4 4 5 4 5 2.4 1 1 1 2 1 1 2 2 1 2 2 3 1 2 2 3 2 2 3 3 3.6 1 2 2 2 1 2 2 3 2 2 3 4 2 3 3 4 2 3 4 5 4.8 1 2 2 3 2 2 3 4 2 3 4 5 2 3 4 5 3 4 5 6.0 2 2 3 4 2 3 4 5 3 4 5 3 4 5 3 5 3.6 7.2 2 3 3 4 2 3 4 5 3 4 5 3 5 4 8.4 2 3 4 5 3 4 5 3 5 4 4 9.6 2 3 4 5 3 4 4 5 4 5 10.8 3 4 5 3 5 4 5 12.0 3 4 5 4 5 5 5 Notes to Table 9.23.10.7.-D: (1) A roof dead load of 0.62 kPa has been assumed. (2) Roof beams require a minimum bearing length of 140 mm. (3) Girder trusses require a minimum bearing length of 140 mm unless otherwise specified by the truss manufacturer. Table 9.23.12.3.-A Maximum Spans for Douglas Fir – Larch Lintels – No. 1 or No. 2 Grade – Non-Structural Sheathing(1) Forming Part of Sentences 9.23.2.8.(1), 9.23.4.5.(1), 9.23.12.3.(1) and (3) Maximum Span, m(3)(4) Exterior Walls Lintel Supporting Lintel Size, mm(2) Specified Snow Load, kPa Interior Walls 1.0 1.5 2.0 2.5 3.0 2 – 38 × 89 1.25 2 – 38 × 140 1.78 Limited attic storage and 2 – 38 × 184 This Area Intentionally Left Blank 2.17 ceiling 2 – 38 × 235 2.65 2 – 38 × 286 3.08 2 – 38 × 89 2.68 2.34 2.13 1.97 1.86 1.97 Roof and ceiling only 2 – 38 × 140 4.21 3.68 3.34 3.10 2.92 3.10 (tributary width of 0.6 m 2 – 38 × 184 5.50 4.84 4.39 4.08 3.84 4.08 maximum)(5) 2 – 38 × 235 6.61 5.97 5.56 5.21 4.88 5.21 2 – 38 × 286 7.66 6.92 6.44 6.09 5.66 6.09 2 – 38 × 89 1.25 1.07 0.96 0.87 0.80 0.87 Roof and ceiling only 2 – 38 × 140 1.78 1.53 1.36 1.24 1.15 1.24 (tributary width of 4.9 m 2 – 38 × 184 2.17 1.86 1.66 1.51 1.40 1.51 maximum)(6) 2 – 38 × 235 2.65 2.28 2.03 1.85 1.71 1.85 2 – 38 × 286 3.08 2.64 2.35 2.14 1.98 2.14 2 – 38 × 89 0.96 0.88 0.82 0.77 0.73 0.68 2 – 38 × 140 1.37 1.26 1.17 1.10 1.04 0.97 Roof, ceiling and 2 – 38 × 184 1.67 1.53 1.42 1.34 1.26 1.18 1 storey(3)(6)(7) 2 – 38 × 235 2.04 1.88 1.74 1.63 1.54 1.44 2 – 38 × 286 2.37 2.18 2.02 1.90 1.79 1.67 2 – 38 × 89 0.86 0.81 0.77 0.73 0.70 0.61 2 – 38 × 140 1.23 1.16 1.09 1.04 0.99 0.87 Roof, ceiling and 2 – 38 × 184 1.50 1.41 1.33 1.27 1.21 1.06 2 storeys(3)(6)(7) 2 – 38 × 235 1.84 1.72 1.63 1.55 1.48 1.30 2 – 38 × 286 2.13 2.00 1.89 1.80 1.72 1.51 2 – 38 × 89 0.81 0.77 0.73 0.71 0.68 0.57 2 – 38 × 140 1.15 1.10 1.05 1.01 0.97 0.82 Roof, ceiling and 2 – 38 × 184 1.40 1.33 1.28 1.22 1.18 1.00 3 storeys(3)(6)(7) 2 – 38 × 235 1.71 1.63 1.56 1.50 1.44 1.22 2 – 38 × 286 1.99 1.89 1.81 1.74 1.67 1.41 Notes to Table 9.23.12.3.-A: (1) Where structural sheathing is used, lintel spans may be increased by 15%. Structural sheathing consists of a minimum 9.5 mm thick structural panel conforming to CSA O121, CSA O151, CSA O325 or CSA O437.0 fastened with at least two rows of fasteners to the exterior face of the lintel, and a single row to the top plates and studs. Fasteners shall conform to Table 9.23.3.5.-A. (2) A single piece of 89 mm thick lumber may be used in lieu of 2 pieces of 38 mm thick lumber on edge. (3) If floor joists span the full width of the building without support, lintel spans shall be reduced by 15% for “Roof, ceiling and 1 storey”, by 20% for “Roof, ceiling and 2 storeys”, and by 25% for “Roof, ceiling and 3 storeys”. (4) For ends of lintels fully supported by walls, provide minimum bearing length of 38 mm for lintel spans up to 3 m, or minimum bearing length of 76 mm for lintel spans greater than 3 m. (5) Spans for 0.6 m tributary width are calculated for lintels in end walls that support only a 0.6 m width of roof and ceiling, but do not support roof joists, roof rafters or roof trusses. (6) Lintel spans are calculated based on a maximum floor joist, roof joist or rafter span of 4.9 m and a maximum roof truss span of 9.8 m. Lintel spans may be increased by 5% if rafter and joist spans are not more than 4.3 m and roof truss spans are not more than 8.6 m. Spans may be increased by 10% if rafter and joist spans are not more than 3.7 m and roof trusses are not more than 7.4 m. (7) Spans apply only where the floors serve residential areas as described in Table 4.1.5.3., or the uniformly distributed live load does not exceed that specified for residential areas as described in Table 4.1.5.3. Table 9.23.12.3.-B Maximum Spans for Hem – Fir Lintels – No. 1 or No. 2 Grade – Non-Structural Sheathing(1) Forming Part of Sentences 9.23.2.8.(1), 9.23.4.5.(1), 9.23.12.3.(1) and (3) Maximum Span, m(3)(4) Exterior Walls Lintel Supporting Lintel Size, mm(2) Specified Snow Load, kPa Interior Walls 1.0 1.5 2.0 2.5 3.0 2 – 38 × 89 1.31 2 – 38 × 140 1.87 Limited attic storage and 2 – 38 × 184 This Area Intentionally Left Blank 2.27 ceiling 2 – 38 × 235 2.78 2 – 38 × 286 3.23 2 – 38 × 89 2.68 2.34 2.13 1.97 1.86 1.97 Roof and ceiling only 2 – 38 × 140 4.21 3.68 3.34 3.10 2.92 3.10 (tributary width of 0.6 m 2 – 38 × 184 5.50 4.84 4.39 4.08 3.84 4.08 maximum)(5) 2 – 38 × 235 6.61 5.97 5.56 5.21 4.90 5.21 2 – 38 × 286 7.66 6.92 6.44 6.09 5.82 6.09 2 – 38 × 89 1.31 1.13 1.00 0.91 0.84 0.91 Roof and ceiling only 2 – 38 × 140 1.87 1.61 1.43 1.30 1.20 1.30 (tributary width of 4.9 m 2 – 38 × 184 2.27 1.95 1.74 1.58 1.42 1.58 maximum)(6) 2 – 38 × 235 2.78 2.39 2.13 1.92 1.71 1.92 2 – 38 × 286 3.23 2.77 2.47 2.17 1.94 2.17 2 – 38 × 89 1.01 0.93 0.86 0.81 0.76 0.69 2 – 38 × 140 1.44 1.32 1.23 1.14 1.05 0.95 Roof, ceiling and 2 – 38 × 184 1.75 1.61 1.47 1.34 1.23 1.12 1 storey(3)(6)(7) 2 – 38 × 235 2.14 1.96 1.76 1.60 1.48 1.35 2 – 38 × 286 2.49 2.22 2.00 1.82 1.69 1.55 2 – 38 × 89 0.91 0.85 0.80 0.76 0.72 0.60 2 – 38 × 140 1.29 1.21 1.13 1.05 0.98 0.82 Roof, ceiling and 2 – 38 × 184 1.57 1.44 1.33 1.24 1.16 0.98 2 storeys(3)(6)(7) 2 – 38 × 235 1.90 1.73 1.60 1.49 1.40 1.19 2 – 38 × 286 2.15 1.97 1.82 1.70 1.60 1.37 2 – 38 × 89 0.85 0.81 0.77 0.74 0.69 0.55 2 – 38 × 140 1.21 1.14 1.06 1.00 0.95 0.76 Roof, ceiling and 2 – 38 × 184 1.43 1.33 1.25 1.18 1.12 0.91 3 storeys(3)(6)(7) 2 – 38 × 235 1.72 1.60 1.50 1.42 1.35 1.10 2 – 38 × 286 1.95 1.82 1.72 1.63 1.55 1.27 Notes to Table 9.23.12.3.-B: (1) Where structural sheathing is used, lintel spans may be increased by 15%. Structural sheathing consists of a minimum 9.5 mm thick structural panel conforming to CSA O121, CSA O151, CSA O325 or CSA O437.0 fastened with at least two rows of fasteners to the exterior face of the lintel, and a single row to the top plates and studs. Fasteners shall conform to Table 9.23.3.5.-A. (2) A single piece of 89 mm thick lumber may be used in lieu of 2 pieces of 38 mm thick lumber on edge. (3) If floor joists span the full width of the building without support, lintel spans shall be reduced by 15% for “Roof, ceiling and 1 storey”, by 20% for “Roof, ceiling and 2 storeys”, and by 25% for “Roof, ceiling and 3 storeys”. (4) For ends of lintels fully supported by walls, provide minimum bearing length of 38 mm for lintel spans up to 3 m, or minimum bearing length of 76 mm for lintel spans greater than 3 m. (5) Spans for 0.6 m tributary width are calculated for lintels in end walls that support only a 0.6 m width of roof and ceiling, but do not support roof joists, roof rafters or roof trusses. (6) Lintel spans are calculated based on a maximum floor joist, roof joist or rafter span of 4.9 m and a maximum roof truss span of 9.8 m. Lintel spans may be increased by 5% if rafter and joist spans are not more than 4.3 m and roof truss spans are not more than 8.6 m. Spans may be increased by 10% if rafter and joist spans are not more than 3.7 m and roof trusses are not more than 7.4 m. (7) Spans apply only where the floors serve residential areas as described in Table 4.1.5.3., or the uniformly distributed live load does not exceed that specified for residential areas as described in Table 4.1.5.3. Table 9.23.12.3.-C Maximum Spans for Spruce – Pine – Fir Lintels – No. 1 or No. 2 Grade – Non-Structural Sheathing(1) Forming Part of Sentences 9.23.2.8.(1), 9.23.4.5.(1), 9.23.12.3.(1) and (3) Maximum Span, m(3)(4) Exterior Walls Lintel Supporting Lintel Size, mm(2) Specified Snow Load, kPa Interior Walls 1.0 1.5 2.0 2.5 3.0 2 – 38 × 89 1.27 2 – 38 × 140 1.93 Limited attic storage and 2 – 38 × 184 This Area Intentionally Left Blank 2.35 ceiling 2 – 38 × 235 2.88 2 – 38 × 286 3.34 2 – 38 × 89 2.55 2.23 2.02 1.88 1.77 1.88 Roof and ceiling only 2 – 38 × 140 4.01 3.50 3.18 2.96 2.78 2.96 (tributary width of 0.6 m 2 – 38 × 184 5.27 4.61 4.18 3.88 3.66 3.88 maximum)(5) 2 – 38 × 235 6.37 5.76 5.34 4.96 4.67 4.96 2 – 38 × 286 7.38 6.67 6.21 5.87 5.61 5.87 2 – 38 × 89 1.27 1.11 1.01 0.93 0.87 0.93 Roof and ceiling only 2 – 38 × 140 1.93 1.66 1.48 1.35 1.25 1.35 (tributary width of 4.9 m 2 – 38 × 184 2.35 2.02 1.80 1.64 1.52 1.64 maximum)(6) 2 – 38 × 235 2.88 2.47 2.20 2.01 1.84 2.01 2 – 38 × 286 3.34 2.87 2.56 2.33 2.09 2.33 2 – 38 × 89 1.05 0.96 0.89 0.84 0.79 0.74 2 – 38 × 140 1.49 1.37 1.27 1.19 1.13 1.02 Roof, ceiling and 2 – 38 × 184 1.82 1.67 1.55 1.44 1.33 1.20 1 storey(3)(6)(7) 2 – 38 × 235 2.22 2.04 1.89 1.73 1.59 1.45 2 – 38 × 286 2.58 2.36 2.15 1.96 1.81 1.66 2 – 38 × 89 0.94 0.88 0.83 0.79 0.76 0.64 2 – 38 × 140 1.34 1.26 1.19 1.13 1.06 0.88 Roof, ceiling and 2 – 38 × 184 1.63 1.53 1.44 1.33 1.25 1.05 2 storeys(3)(6)(7) 2 – 38 × 235 1.99 1.87 1.72 1.60 1.50 1.27 2 – 38 × 286 2.31 2.12 1.96 1.82 1.71 1.45 2 – 38 × 89 0.88 0.83 0.80 0.77 0.74 0.59 2 – 38 × 140 1.25 1.19 1.14 1.08 1.02 0.81 Roof, ceiling and 2 – 38 × 184 1.52 1.44 1.35 1.27 1.21 0.97 3 storeys(3)(6)(7) 2 – 38 × 235 1.86 1.73 1.62 1.53 1.45 1.17 2 – 38 × 286 2.11 1.96 1.84 1.74 1.66 1.35 Notes to Table 9.23.12.3.-C: (1) Where structural sheathing is used, lintel spans may be increased by 15%. Structural sheathing consists of a minimum 9.5 mm thick structural panel conforming to CSA O121, CSA O151, CSA O325 or CSA O437.0 fastened with at least two rows of fasteners to the exterior face of the lintel, and a single row to the top plates and studs. Fasteners shall conform to Table 9.23.3.5.-A. (2) A single piece of 89 mm thick lumber may be used in lieu of 2 pieces of 38 mm thick lumber on edge. (3) If floor joists span the full width of the building without support, lintel spans shall be reduced by 15% for “Roof, ceiling and 1 storey”, by 20% for “Roof, ceiling and 2 storeys”, and by 25% for “Roof, ceiling and 3 storeys”. (4) For ends of lintels fully supported by walls, provide minimum bearing length of 38 mm for lintel spans up to 3 m, or minimum bearing length of 76 mm for lintel spans greater than 3 m. (5) Spans for 0.6 m tributary width are calculated for lintels in end walls that support only a 0.6 m width of roof and ceiling, but do not support roof joists, roof rafters or roof trusses. (6) Lintel spans are calculated based on a maximum floor joist, roof joist or rafter span of 4.9 m and a maximum roof truss span of 9.8 m. Lintel spans may be increased by 5% if rafter and joist spans are not more than 4.3 m and roof truss spans are not more than 8.6 m. Spans may be increased by 10% if rafter and joist spans are not more than 3.7 m and roof trusses are not more than 7.4 m. (7) Spans apply only where the floors serve residential areas as described in Table 4.1.5.3., or the uniformly distributed live load does not exceed that specified for residential areas as described in Table 4.1.5.3. Table 9.23.12.3.-D Maximum Spans for Glued-Laminated Timber Lintels – 20f-E Stress Grade – Exterior Walls – Roof and Ceiling Load Only Forming Part of Sentences 9.23.2.8.(1), 9.23.4.5.(1), 9.23.12.3.(1) and (3) Maximum Span, m(1)(2)(3) Specified Snow Load, kPa Lintel Size, mm 1.0 1.5 2.0 2.5 3.0 Supported Length, m(4)(5) Supported Length, m(4)(5) Supported Length, m(4)(5) Supported Length, m(4)(5) Supported Length, m(4)(5) 2.4 3.6 4.8 2.4 3.6 4.8 2.4 3.6 4.8 2.4 3.6 4.8 2.4 3.6 4.8 130 × 304 6.23 5.63 5.24 5.63 5.09 4.73 5.24 4.73 4.40 4.95 4.48 4.17 4.73 4.28 3.87 80 × 380 6.52 5.89 5.48 5.89 5.32 4.96 5.48 4.96 4.52 5.19 4.69 4.11 4.96 4.39 3.80 130 × 342 6.80 6.15 5.72 6.15 5.56 5.17 5.72 5.17 4.81 5.41 4.89 4.55 5.17 4.67 4.35 80 × 418 7.00 6.33 5.89 6.33 5.72 5.32 5.89 5.32 4.96 5.57 5.03 4.52 5.32 4.81 4.18 130 × 380 7.36 6.65 6.19 6.65 6.01 5.59 6.19 5.59 5.21 5.86 5.29 4.92 5.59 5.06 4.70 80 × 456 7.48 6.76 6.29 6.76 6.10 5.68 6.29 5.68 5.29 5.95 5.37 4.93 5.68 5.13 4.56 130 × 418 7.91 7.15 6.65 7.15 6.46 6.01 6.65 6.01 5.59 6.29 5.68 5.29 6.01 5.43 5.05 80 × 494 7.94 7.17 6.68 7.17 6.48 6.03 6.68 6.03 5.61 6.31 5.71 5.31 6.03 5.45 4.94 80 × 532 8.39 7.58 7.06 7.58 6.85 6.38 7.06 6.38 5.93 6.67 6.03 5.61 6.38 5.76 5.32 130 × 456 8.44 7.63 7.10 7.63 6.89 6.41 7.10 6.41 5.97 6.71 6.07 5.65 6.41 5.80 5.39 Notes to Table 9.23.12.3.-D: (1) Spans are valid for glued-laminated timber conforming to CAN/CSA-O122 and CSA O177. (2) Provide a minimum bearing length of 89 mm. (Alternatively, the bearing length may be calculated in accordance with Part 4.) (3) Top edge of lintel assumed to be fully laterally supported. (4) Supported length means half the length of trusses or rafters, plus the length of overhang beyond the wall. (5) For intermediate supported lengths, straight interpolation may be used.