Construction codes of Ontario

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Sheet or Panel Products

Sheet or Panel Products Panel products such as plywood and oriented strand board (OSB) are used in wood-frame construction to add rigidity to roof, wall and floor framing, and to provide a uniform surface for the application of roofing, cladding and floor finish materials. Plywood is made of thin layers or plies of wood glued […]

Specified Loads – Application

Specified Loads – Application (1) This Subsection applies to light-frame construction whose wall, floor and roof planes are generally comprised of frames of small repetitive structural members, and where, (a) the roof and wall planes are clad, sheathed or braced on at least one side, (b) the small repetitive structural members are spaced not […]

Strapping and Bridging in Tables A-1 and A-2

Strapping and Bridging in Tables A-1 and A-2 (1) Except as permitted by Sentence (5), where strapping is specified in Table A-1, it shall be, (a) not less than 19 mm by 64 mm, nailed to the underside of floor joists, (b) located not more than 2.1 m from each support or other rows […]

Structural Design Requirements and Application Limitations – General

Structural Design Requirements and Application Limitations (1) Subject to the application limitations defined elsewhere in this Part, structural members and their connections shall, (a) conform to requirements provided elsewhere in this Part, (b) be designed according to good engineering practice such as provided in the CWC, “Engineering Guide for Wood Frame Construction”, or […]

Subfloor

Subfloor Plywood, OSB or tongue-and-grooved lumber no wider than 184 mm (8 in. nominal) is typically used for subflooring. Minimum thicknesses for subflooring are shown in Table 22. Plywood and OSB are often used as subflooring under wood-strip flooring or as a combination subfloor and underlay for resilient flooring or ceramic tile. When used as […]

Subfloor Thickness or Rating

Subfloor Thickness or Rating (1) Except as provided in Sentences (2) and (3), subfloors shall conform to Table 9.23.14.5.A. or 9.23.14.5.B. (2) Where the finished flooring consists of not less than 19 mm matched wood strip flooring laid at right angles to joists, spaced not more than 610 mm o.c., subflooring shall be permitted to consist of […]

Subflooring Direction of Installation

Subflooring Direction of Installation (1) Plywood subflooring shall be installed with the surface grain at right angles to the joists and with joints parallel to floor joists staggered. (2) OSB subflooring conforming to CSA O325, “Construction Sheathing”, or to O-1 and O-2 grades in CSA O437.0, “OSB and Waferboard”, and waferboard subflooring conforming to R-1 grade in […]