Therefore if a handrail is provided on one side, the clear width of the stairs shall not be less than 31 ½ inches and when handrails are provided on both sides, the clear width shall not be less than 27 inches. (1) for fire escapes, steps for stairs shall have a run of not less than 255 mm and not more than 355 mm between successive steps. A rise is defined as the vertical distance between nosing to nosing. Three terms are used in the OBC to provide dimensional frequently requirements for steps these are: rise, run, and tread depth.
Stairs ontario building code code#
(1) Except as permitted for dwelling units and by Sentence 3.4.7.5. Current Ontario Building Code Requirements Building code requirements for rectangular stairs in residential dwellings are provided under Part 9 of the Ontario Building Code (OBC). Now when handrails are introduced they shall not project more than 4 ½ inches on either side. The Ontario Building Code Treads and Risers. The minimum width for stairways shall not be less than 36 inches clear. Now let’s get into what those residential stair requirements are… MINIMUM STAIR WIDTH What is the Minimum Width of a Stair? In this post we will be looking at the code standards related to residential stairs in accordance with the International Residential Code (IRC).įun Tip: What’s the difference between the IBC and IRC? Be sure to check out this POST.įun Tip: Looking for Commercial Stair Requirements? Be sure to check out this POST. Note that when looking for commercial stair standards, one must look at the International Building Code (IBC). Several components are looked at such as stair width, headroom, riser and tread heights. When it comes to residential stair standards, the 2018 International Residential Code (IRC) establishes minimum requirements for stairs to insure a level of safety to the public. Are A lternating Tread Devices Code Compliant ?.
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