The Ontario Building Code | Projections into Stairs and Ramps
9.8.7.6. Projections into Stairs and Ramps
(1) handrails and projections below handrails, including handrail supports and stair stringers, shall not project more than 100 mm into the required width of a stair or ramp.
In Plain Language
Handrails and other elements can't project into a stair or ramp's required width beyond the limits set out in this article, preserving the full usable clear width.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.