The Ontario Building Code | Contribution of Each Exit
9.9.8.3. Contribution of Each Exit
(1) Where more than one exit is required from a floor area, each exit shall be considered as contributing not more than half the required exit width.
In Plain Language
Where multiple exits are required, this article sets out how much of the occupant load each individual exit is credited with handling, ensuring the exits collectively provide adequate capacity even if one becomes unusable.
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.