The Ontario Building Code | Openings to be Protected With Closures
9.10.9.3. openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings to be protected With Closures
(1) Except as permitted in Articles 9.10.9.5. to 9.10.9.7., openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings in required fire separations shall be protected with closures conforming to Subsection 9.10.13.
In Plain Language
Openings in a fire separation must be protected with closures, such as fire-rated doors, as set out in this article, maintaining the separation's overall fire-resistance performance.
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.