Code Library › Volume 1 › Section 3.4 — Exits
PART 3 — FIRE PROTECTION, OCCUPANT SAFETY AND ACCESSIBILITYUpdated for the 2024 Ontario Building Code

3.4.6.2.Minimum Number of Risers

(1) Except as permitted by Sentence 3.3.2.15.(1), every flight of interior stairs shall have not less than 3 risers.
← Previous3.4.6.1. Surface Finish of Ramps and StairsNext →3.4.6.3. Maximum Vertical Rise of Stair Flights and Requi

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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.