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
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(b) complies with the dimensions for rectangular treads specified in Table 9.8.4.1. when measured at a point 300 mm from the centre line of the inside handrail.
(2) Tapered treads in required exit stairs shall conform to the requirements in Article 3.4.6.9.
(3) The depth of a tapered tread shall be not less than its run at any point and not more than its run at any point plus 25 mm.
Article 9.8.4.3 Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only.
