The Ontario Building Code | Fire Stop Flaps
9.10.13.14. Fire Stop Flaps
(1) Fire stop flaps in ceiling membranes required in Sentence 9.10.5.1.(4) shall be constructed in conformance with MMAH Supplementary Standard SB-2, "Fire Performance Ratings".
In Plain Language
Fire stop flaps, similar in purpose to fire dampers but used in specific duct configurations, are required as set out in this article.
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.