PART 3 — FIRE PROTECTION, OCCUPANT SAFETY AND ACCESSIBILITYUpdated for the 2024 Ontario Building Code

3.2.8.2.Exceptions to Special Protection

(1) A mezzanine need not terminate at a vertical fire separation nor be protected in conformance with the requirements of Articles 3.2.8.3. to 3.2.8.8. provided the mezzanine (a) serves a Group A, Division 1 major occupancy, (b) serves a Group A, Division 3 major occupancy in a building not more than 2 storeys in building height, or (c) serves a Group A, C, D, E or F major occupancy and (i) is 500 m2 or less in area, and (ii) conforms to Sentence 3.2.1.1.(3) or (4). (2) Except for floors referred to in Sentence 3.1.10.3.(1) and Article 3.2.1.2., openings through a horizontal fire separation for vehicular ramps in a storage garage are not required to be protected with closures and need not conform to this Subsection. (3) If a closure in an opening in a fire separation would disrupt the nature of a manufacturing process, such as a continuous flow of material from storey to storey, the closure for the opening is permitted to be omitted provided precautions are taken to offset the resulting hazard. (See Note A-3.2.8.2.(3)) (4) An interconnected floor space in a Group B, Division 1 occupancy need not conform to the requirements of Articles

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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.