The Ontario Building Code | Collapse of Combustible Construction
9.10.9.8. Collapse of Combustible Construction
(1) Combustible construction that abuts on or is supported by a noncombustible fire separation shall be constructed so that its collapse under fire conditions will not cause collapse of the fire separation.
In Plain Language
Fire separations must be designed so the collapse of combustible construction on one side doesn't bring down the separation itself, as set out in this article.
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.