The Ontario Building Code | Exit Requirements
3.10.2.5. Exit Requirements
(1) Except as provided in Sentences (2) and (3), the requirements in Section 3.4. shall apply.
(2) The clear width of an exit stair shall be not less than 1 100 mm.
(3) Exit doors from rental spaces are not required to swing on a vertical axis provided,
(a) the area of the rental space is not more than 50 m2, and
(b) the travel distance within the rental space is not more than 10 m.
In Plain Language
Section 3.4's exit requirements generally apply, but an exit stair's clear width can be as narrow as 1,100 mm, and exit doors from small rental spaces need not swing on a vertical axis if area and travel-distance conditions are met.
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.