Construction codes of Ontario

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Grade Marking (Lumber and Wood Products)

Grade Marking (1) Lumber for joists, rafters, trusses and beams and for the uses listed in Table 9.3.2.1. shall be identified by a grade stamp to indicate its grade as determined by the NLGA, “Standard Grading Rules for Canadian Lumber”. Article 9.3.2.1 Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only.

Gypsum Board Materials

Gypsum Board Materials (1) Gypsum products shall conform to, (a) CAN/CSA-A82.27-M, “Gypsum Board”, (b) ASTM C1178 / C1178M, “Coated Glass Mat Water-Resistant Gypsum Backing Panel”, or (c) ASTM C1396 / C1396M, “Gypsum Board”. Article 9.29.5.2 Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only

Gypsum Board Maximum Spacing of Supports

Gypsum Board Maximum Spacing of Supports (1) Maximum spacing of supports for gypsum board applied as a single layer shall conform to Table 9.29.5.3. Article 9.29.5.3. Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only. GYPSUM BOARD FINISH Gypsum board is the most widely used interior finish because of its speed […]

Gypsum Board Supporting Insulation

Gypsum Board Supporting Insulation (1) Gypsum board supporting insulation shall be at least 12.7 mm thick. Article 9.29.5.4. Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only. GYPSUM BOARD FINISH Although 9.5 mm (3⁄8 in.) thick gypsum board may be used on walls with support spacings up to 400 mm (16 […]

Gypsum Products

Gypsum Products (1) Gypsum products shall conform to, (a) CAN/CSA-A82.27-M, “Gypsum Board”, (b) ASTM C1178 / C1178M, “Coated Glass Mat Water-Resistant Gypsum Backing Panel”, or (c) ASTM C1396 / C1396M, “Gypsum Board”. Article 9.29.5.2. Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only.

Hydrostatic Pressure (floor-on ground)

Hydrostatic Pressure floor-on ground (1) Where groundwater levels may cause hydrostatic pressure beneath a floor-on-ground, the floor-on-ground shall be, (a) a cast-in-place concrete slab, and (b) designed to resist such pressures Article 9.16.3.2 Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only.

Indoor Design Temperatures

Indoor Design Temperatures (1) At the outside design temperature, required heating facilities shall be capable of maintaining an indoor air temperature of not less than, (a) 22°C in all living spaces, (b) 22°C in unfinished basements, and (c) 15°C in heated crawl spaces. Article 9.33.3.1 Ontario Regulation 332/12 Building Code, Information published […]