Construction codes of Ontario

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Curing Concrete

Newly placed concrete must be cured for a set period of time to allow the concrete to achieve its potential strength, water tightness and durability, and to minimize cracking. To cure, concrete must be kept damp and within a limited temperature range. Wall forms should be left in place for at least three days to […]

Dampproofing of Floors-on-Ground

Dampproofing of Floors-on-Ground (1) Where dampproofing is installed below the floor, it shall consist of, (a) polyethylene not less than 0.15 mm thick with joints lapped not less than 100 mm, (b) Type S roll roofing with joints lapped not less than 100 mm, or (c) rigid extruded/expanded polystyrene with sealed or ship-lapped […]

Design and Attachment of Handrails

Design and Attachment of Handrails (1) Handrails and their supports shall be designed and constructed to withstand the following loads, which need not be considered to act simultaneously: (a) a concentrated load of not less than 0.9 kN applied at any point and in any direction for all handrails, and (b) for handrails other […]

Design of Adjustable Steel Columns

Design of Adjustable Steel Columns, (1) Where the imposed load does not exceed 36 kN, adjustable steel columns shall conform to CAN/CGSB-7.2, “Adjustable Steel Columns”. (2) Adjustable steel columns other than those described in Sentence (1) shall be designed in accordance with Part 4. Article 9.17.3.4. Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for […]

Dimensions for Risers

(1) The rise, which is measured as the vertical nosing-to-nosing distance, shall conform to Table 9.8.4.1. Table 9.8.4.1.Rise for Rectangular Treads, Tapered Treads and Winders and Run for Rectangular Treads Forming Part of Sentences 9.8.4.1.(1) and 9.8.4.2.(1) Notes to Table 9.8.4.1.: (1) Private stairs are: (a) interior stairs within a house or an individual dwelling unit, […]

Dimensions for Runs and Rectangular Treads

(1) The run for rectangular treads shall conform to Table 9.8.4.1. (2) The depth of a rectangular tread shall be not less than its run and not more than its run plus 25 mm. Article 9.8.4.2 Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only.

Dimensions for Tapered Treads

Dimensions for Tapered Treads (1) Except as provided in Sentence (2) and Articles 9.8.4.5. and 9.8.4.5A., tapered treads shall have a run that, (a) is not less than 150 mm at the narrow end of the tread, and (b) complies with the dimensions for rectangular treads specified in Table 9.8.4.1. when measured at a […]