The Ontario Building Code | Exposure Protection for Adjacent Walls
3.1.10.6. Exposure Protection for Adjacent walls
(1) The requirements of Article 3.2.3.14. shall apply to the external walls of two buildings that meet at a firewall at an angle less than 135°.
In Plain Language
Where two buildings meet at a firewall at an angle less than 135°, the exterior-wall exposure-protection requirements of Article 3.2.3.14 apply to those adjoining walls.
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.