The Ontario Building Code | Heavy Timber Construction
9.10.6.2. Heavy Timber Construction
(1) Heavy timber construction shall be considered to have a 45 min fire-resistance rating when it is constructed in accordance with the requirements for heavy timber construction in Article 3.1.4.7.
9.10.7. Steel Members
In Plain Language
Heavy timber construction, a specific fire-resistant heavy-wood building method, must meet the requirements set out in this article to qualify for its recognized fire 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.