The Ontario Building Code | Buildings Containing More Than One Major Occupancy
9.10.2.4. buildings Containing More Than One Major Occupancy
(1) In a building containing more than 1 major occupancy, where the aggregate area of all major occupancies in a particular group or division does not exceed 10% of the floor area on the storey on which they are located, they need not be considered as major occupancies for the purposes of Articles 9.10.2.3. and 9.10.8.1. provided they are not classified as Group F, Division 2 occupancies.
9.10.3. Ratings
In Plain Language
Buildings containing more than one major occupancy have specific requirements set out in this article, addressing how different occupancy types sharing one building must be separated and protected.
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.