Code Library › Volume 1 › Section 3.3 — Safety Within Floor Areas (See Note A-3.3.)
PART 3 — FIRE PROTECTION, OCCUPANT SAFETY AND ACCESSIBILITYUpdated for the 2024 Ontario Building Code

3.3.4.8.Protection of Openable Windows

(1) Except as provided in Sentence (2), openable windows in suites of residential occupancy shall be protected by (a) a guard with a minimum height of 1 070 mm constructed in accordance with Article 3.3.1.18., or (b) a mechanism that can only be released with the use of tools or special knowledge to control the free swinging or sliding operation of the openable part of the window so as to limit any clear unobstructed opening to not more than 100 mm measured either vertically or horizontally. (2) Windows need not be protected in accordance with Sentence (1) where (a) the only opening having greater dimensions than those allowed by Clause (1)(b) is located higher than 1 070 mm above the finished floor, or (b) the bottom edge of the openable portion of the window is located less than 1 800 mm above the floor or ground on the other side of the window.
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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.