The Ontario Building Code | Clear Height
9.9.3.4. Clear Height
(1) Except for stairways, doorway ="http://thehandyforce.com/doors/" title ="Toronto Door installer">doorways and storage garages, the minimum clear height in exits and access to exits shall be 2 100 mm.
(2) The clear height in exits and access to exits in a storage garage shall be not less than 2 000 mm.
9.9.4. Fire Protection of Exits
In Plain Language
Exits and the paths leading to them must maintain a minimum clear height as set out in this article, so no one has to duck or is struck by an overhead obstruction while evacuating.
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.