The Ontario Building Code | Openings to be Protected With Closures
9.10.9.3. Openings to be Protected With Closures
(1) Except as permitted in Articles 9.10.9.5. to 9.10.9.7., 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.