The Ontario Building Code | Wall with Limiting Distance Less Than 1.2 m
3.2.3.5. wall with Limiting Distance Less Than 1.2 m
(1) openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings in a wall that has a limiting distanceless than 1.2 m shall be protected by closureswhose fire-protection rating is in conformance with the fire-resistance rating required for the wall.
(2) wireref ="http://thehandyforce.com/electrical/" title ="Electricians in East York">wired glass or glass block shall not be used for a closure referred to in Sentence (1).
In Plain Language
Where the calculated unprotected opening percentage would be exceeded, this clause allows compensating by installing closures, wired glass, or sprinkler protection at the wall so the effective fire risk still meets the Table 3.2.3.1 limit.
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.