PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code
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9.23.13.6.Materials in Braced Wall Panels
(1) Required braced wall panels shall be
(a) clad with panel-type cladding complying with Section 9.27. and Table 9.23.3.4.,
(b) sheathed with plywood, OSB, waferboard or diagonal lumber sheathing complying with Subsection 9.23.16. and
Table 9.23.13.6., and fastened in accordance with Article 9.23.3.5., or
(c) finished on the interior with a panel-type material in accordance with the requirements of Section 9.29. and Table
9.23.13.6.
Table 9.23.13.6.
Minimum Thicknesses of Cladding, Sheathing or Interior Finish for Braced Wall Panels
Forming Part of Sentence 9.23.13.6.(1)
Minimum Thickness
Panel-Type Cladding, Where Sa(0.2) ≤ 0.90 Where Sa(0.2) > 0.90
Sheathing or Interior Finish With supports With supports With supports With supports
400 mm o.c. 600 mm o.c. 400 mm o.c. 600 mm o.c.
Gypsum board interior finish(1) 12.7 mm 15.9 mm 12.7 mm 15.9 mm
Sheathing complying with CSA O325 W16 W24 W16 W24
OSB O-1 and O-2 grades 11 mm 12.5 mm 11 mm 12.5 mm
Waferboard R-1 grade 9.5 mm 12.5 mm n/a n/a
Plywood 11 mm 12.5 mm 11 mm 12.5 mm
Diagonal lumber 17 mm 17 mm n/a n/a
Notes to Table 9.23.13.6.:
(1) See Sentences (5) and (6).
(2) Except as provided in Sentence (3), required interior braced wall panels shall be
(a) sheathed or finished on both sides with a wood-based material, or
(b) finished on both sides with gypsum board.
(3) Required interior braced wall panels of wood-based material may be sheathed on one side only, provided
(a) the sheathing material is plywood, OSB or waferboard, and
(b) the maximum spacing of fasteners along the edge is half of the maximum spacing shown in Table 9.23.3.5.-B.
(4) For stacked braced wall bands, where the construction of any one braced wall panel is required to be of a wood-
based material, a wood-based material shall be installed in all the required braced wall panels in that braced wall band.
(5) Gypsum board interior finish shall not be considered as an acceptable sheathing material to provide the required
bracing in exterior walls. (See Note A-9.23.13.6.(5) and (6))
(6) At braced wall band spacing intervals of not more than 15 m, braced wall panels shall be constructed with OSB,
plywood or diagonal lumber. (See Note A-9.23.13.6.(5) and (6))
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.