Dimensions for Tapered Treads
(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 184.108.40.206. 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 220.127.116.11.
(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 18.104.22.168 Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only.