The Ontario Building Code | Connected Buildings
3.2.6.3. Connected buildings
(1) If a building described in Article 3.2.6.1. is connected to any other building, measures shall be taken to limit movement of contaminated air from one building into another during a fire.
In Plain Language
This clause requires a voice communication system in high buildings so instructions can be given directly to specific floors, since a phased or floor-by-floor evacuation approach is often used in tall buildings rather than an all-at-once evacuation.
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.