The Ontario Building Code | More Than One Level of Mezzanine
9.10.4.2. More Than One Level of Mezzanine
(1) Where more than 1 level of mezzanine is provided in a storey, each level additional to the first shall be considered as a storey.
In Plain Language
Where a building has more than one level of mezzanine, this article sets out the additional requirements that apply, since stacked mezzanines behave more like actual storeys for fire safety purposes.
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.