Construction codes of Ontario

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Through-Wall Flashing

Through-Wall Flashing A through-wall flashing intercepts and directs any water flowing down the cavity to the exterior (see Figures 120 and 121). Figure 120 Figure 121 Oncodes.ca publishes this information for educational purposes only (CMHC)

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 […]

Uniformity and Tolerances for Risers and Treads

Uniformity and Tolerances for Risers and Treads (1) Except as provided in Sentence (2), risers shall be of uniform height in any one flight with a maximum tolerance of, (a) 5 mm between adjacent treads or landings, and (b) 10 mm between the tallest and shortest risers in a flight. (2) Except for required exit stairs, […]

Wiring methods — Underground

Wiring methods — Underground 1) Wiring underground shall be run a) in rigid steel or rigid aluminum conduit;b) in non-metallic underground conduit;c) as mineral-insulated cable, aluminum-sheathed cable, or copper-sheathed cable; ord) as cable suitable for direct earth burial as selected in accordance with Rule 12-102 3) or, where a deviation has been allowed in accordance […]

Wood Column Sizes

Wood Column Sizes, (1) The width or diameter of a wood column shall be not less than the width of the supported member. (2) Except as provided in Article 9.35.4.2., columns shall be not less than 184 mm for round columns and 140 mm by 140 mm for rectangular columns, unless calculations are provided to show that […]

Wood Column Termite Protection

Wood Column Termite Protection (1) Where termites are known to exist, exterior wood columns, such as porch supports, shall be, (a) pressure-treated with a chemical that is toxic to such termites, in accordance with Article 9.3.2.9., or (b) supported on non-cellulosic material extending not less than 150 mm above the finished ground and […]

Wood Protection from Decay

Wood Protection from Decay (1) Ends of wood joists, beams and other members framing into masonry or concrete shall be treated to prevent decay where the bottom of the member is at or below ground level, or a 12 mm air space shall be provided at the end and sides of the member. Article 9.23.2.2. Ontario […]