The Ontario Building Code | Access Provided through a Firewall
9.10.18.1. Access Provided through a Firewall
(1) Where access is provided through a firewall, the requirements in this Subsection shall apply to the floor areas on both sides of the firewall as if they were in the same building.
In Plain Language
Where access is provided through a firewall, this article sets out the specific requirements that must be met, since any opening in a firewall needs careful protection to preserve its fire-stopping role.
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.