The Ontario Building Code | Exterior Walls Meeting at an Angle
9.10.12.3. exterior Walls Meeting at an Angle
(1) Except as provided in Article 9.9.4.5., where exterior walls of a building meet at an external angle of less than 135°, the horizontal distance from an opening in one wall to an opening in the other wall shall be not less than 1.2 m where the openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings are in different fire compartments.
(2) The exterior wall of each fire compartment referred to in Sentence (1) within the 1.2 m distance, shall have a fire-resistance rating not less than that required for the interior vertical fire separation between the compartment and the remainder of the building.
In Plain Language
Where exterior walls meet at an angle, this article sets out how spatial separation and opening limits apply to that corner condition.
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.