In Plain Language

Interconnected floor spaces, such as open stairwells or atriums connecting multiple storeys, have specific fire separation requirements set out in this article addressing the increased risk of fire and smoke spread between floors.

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.