Construction codes of Ontario

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Support for Cladding Materials

Support for Cladding Materials (1) Corners and intersections shall be designed to provide adequate support for the vertical edges of interior finishes, sheathing and cladding materials, and in no instance shall exterior corners be framed with less than the equivalent of two studs. Article 9.23.10.5. Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for […]

Support of Walls

Support of Walls (1) Non-loadbearing walls parallel to the floor joists shall be supported by joists beneath the wall or on blocking between the joists. (2) Blocking referred to in Sentence (1) for the support of non-loadbearing walls shall be not less than 38 mm by 89 mm lumber, spaced not more than 1.2 m apart. […]

Top Plates

Top Plates (1) Except as permitted in Sentences (2) to (4), no fewer than two top plates shall be provided in loadbearing walls. (2) A single top plate is permitted to be used in a section of a loadbearing wall containing a lintel provided the top plate forms a tie across the lintel. (3) A single […]

Treads

(1) Stair Treads of lumber, plywood or O-2 grade OSB within dwelling units shall be not less than 25 mm actual thickness, except that if open risers are used and the distance between stringers exceeds 750 mm, the treads shall be not less than 38 mm actual thickness. (2) Stair treads of plywood or OSB, that are […]

Treads and Risers

Treads and Risers (1) Except as permitted for dwelling units and by Sentence 3.4.7.5.(1) for fire escapes, steps in flights shall have a run of not less than 280mm and not more than 355 mm between successive steps. (2) Steps referred to in Sentence (1) shall have a rise between successive treads not less than 125 […]

Vapour Barrier Materials

Vapour Barrier Materials (1) Vapour barriers shall have a permeance not greater than 60 ng/(Pa∙s∙m2), measured in accordance with ASTM E96 / E96M, “Water Vapor Transmission of Materials”, using the desiccant method (dry cup). (2) Where the intended use of the interior space will result in high moisture generation, the assembly shall be designed according to […]

Wall Stud Size and Spacing

Wall Stud Size and Spacing (1) Except as provided in Sentence (2), the size and spacing of studs shall conform to Table 9.23.10.1. (2) Studs for walls not listed in Table 9.23.10.1. and supporting roof loads shall conform to Tables A-30 to A-33, provided, (a) the studs are clad with not less than 9.5 mm thick […]