Construction codes of Ontario

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Subflooring Edge Support

Subflooring Edge Support (1) Where the edges of panel-type subflooring are required to be supported, such support shall consist of tongue-and-groove panel edges or not less than 38 mm by 38 mm blocking securely nailed between framing members. Article 9.23.14.3. Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only.

Subflooring Material Standards

Subflooring Material Standards (1) Except as provided in Sentence (2), wood-based panels for subfloors shall conform to, (a) CSA O121, “Douglas Fir Plywood”, (b) CSA O151, “Canadian Softwood Plywood”, (c) CSA O153, “Poplar Plywood”, (d) CSA O325, “Construction Sheathing”, or (e) CSA O437.0, “OSB and Waferboard”. (2) Particleboard subflooring may be […]

Subflooring Required

Subflooring Required (1) Subflooring shall be provided beneath finish flooring where the finish flooring does not have adequate strength to support the design loads. Article 9.23.14.1.Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only.

Support of Beams and Columns

Support of Beams and Columns (1) Beams and columns supported on masonry walls shall be supported on pilasters where the thickness of the masonry wall or wythe is less than 190 mm. (2) Not less than 190 mm depth of solid masonry or concrete shall be provided under the beam or column referred to in Sentence (1). […]

Support of Floor Joists

Support of Floor Joists and Beams on Masonry Foundation Walls (1) Except as permitted in Sentence (2), foundation walls of hollow masonry units supporting floor joists shall be capped with, (a) not less than 50 mm of concrete, (b) solid masonry units that are 100% solid and not less than 50 mm high, or […]

Support of Floors

Support of Floors on-ground (1) Material that is susceptible to changes in volume due to variations in moisture content or chemical-microbiological oxidation shall not be used as fill beneath floors-on-ground in a concentration that will damage the building to a degree that would adversely affect its stability or the performance of assemblies separating dissimilar environments. […]

Support of Tail and Header Joists

Support of Tail and Header Joists (1) When tail joists and header joists are supported by the floor framing, they shall be supported by suitable joist hangers or nailing in accordance with Table 9.23.3.4. Article 9.23.9.7 Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only.