The Ontario Building Code | Headroom Clearance
3.3.1.8. Headroom Clearance
(1) Except within the floor area of a storage garage, the minimum headroom clearance in every access to exit shall conform to the requirements of Article 3.4.3.5. for exits.
In Plain Language
This clause sets requirements for exit stair design, including minimum width, riser and tread dimensions, and landing sizes, ensuring stairs used as exits are safe and efficient for a crowd moving under emergency conditions.
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.