The Ontario Building Code | Openings in Exterior Walls of Exits
9.9.4.5. openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings in Exterior walls of Exits
(1) Either openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings in the exterior walls of an exit or openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings in adjacent exterior walls of the buildingthe exit serves shall be protected with wireref ="http://thehandyforce.com/electrical/" title ="Electricians in East York">wired glass in fixed steel frames or glass block installed in accordance with Articles 9.10.13.5. and 9.10.13.7., where,
(a) the exitenclosure has exterior walls that intersect the exterior walls of the building at an angle of less than 135° measured on the outside of the building, and
(b) the openings in the exterior walls of the building are within 3 m horizontally and less than 2 m above the openings in the exterior walls of the exit.
In Plain Language
Openings in the exterior walls of an exit are restricted as set out in this article, protecting the exit from fire exposure originating outside the building or from an adjacent part of the building.
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.