The Ontario Building Code | Hazardous Substances, Equipment and Processes
3.3.1.2. Hazardous Substances, Equipment and Processes
(1) Except as provided in Subsection 3.3.6., the storage, handling and use of the hazardous substances shall be in conformance with,
(a) the Fire Code made under the Fire Protection and Prevention Act, 1997, or
(b) the CCBFC NRCC 53303, "National Fire Code of Canada", in the absence of regulations referred to in Clause (a).
(2) Cooking equipment, not within a dwelling unit, used in processes producing grease-laden vapours shall be designed and installed in conformance with Part 6.
(3) A fuel-fired appliance shall not be installed in a corridor serving as an access to exit.
In Plain Language
This clause sets minimum exit width requirements based on the occupant load being served, ensuring exits are wide enough that everyone in the space can evacuate without dangerous crowding or bottlenecks.
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.