The Ontario Building Code | Elevators
3.2.8.5. Elevators
(1) Except as provided in Sentence (2), where an elevator shaft opens into an interconnected floor space and into storeys that are above such space and that have floor levels more than 18 m above grade, either the elevator doors opening into the interconnected floor spaceor the elevator doors opening into the storeysabove the interconnected floor space shall be protected by vestibules that,
(a) are designed to restrict the passage of contaminated air to the limit described in Sentence 3.2.8.4.(1), and
(b) conform to the requirements of Sentence 3.2.8.4.(3).
(2) Where elevator doors opening into an interconnected floor space are protected by vestibules in conformance with Sentence (1), the elevator doors opening into the lowest storeyof the interconnected floor space need not be protected by such vestibules.
In Plain Language
This clause sets requirements for closures and dampers where building services (like ductwork) pass through the fire separation enclosing an interconnected floor space, maintaining the separation's integrity despite the penetration.
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.