PART 3 — FIRE PROTECTION, OCCUPANT SAFETY AND ACCESSIBILITYUpdated for the 2024 Ontario Building Code
Try BUILDAiD Beta
3.4.2.2.Means of Egress from Mezzanines
(1) Except as permitted by Sentences (2) and (3), the space above a mezzanine shall be served by means of egress
leading to exits accessible at the mezzanine level on the same basis as floor areas.
(2) The means of egress from a mezzanine need not conform to Sentence (1), provided
(a) the mezzanine is not required to terminate at a vertical fire separation, as permitted in Sentence 3.2.8.2.(1),
(b) the occupant load of the mezzanine is not more than 60,
(c) the area of the mezzanine does not exceed the area limits stated in Table 3.4.2.2., and
(d) the distance limits stated in Table 3.4.2.2. measured along the path of travel are not exceeded from any point on the
mezzanine to
(ii) an egress door serving the space that the mezzanine overlooks, if the space is served by a single egress door,
or
(ii) the egress stairway leading to an access to exit in the space below if that space is required to be served by 2 or
more egress doorways in conformance with Sentence 3.3.1.5.(1).
(3) At least half of the required means of egress from a mezzanine shall comply with Sentence (1) if the mezzanine is
not required to terminate at a fire separation as permitted by Sentence 3.2.8.2.(1).
Table 3.4.2.2.
Criteria for Egress from Mezzanine Space
Forming Part of Sentence 3.4.2.2.(2)
Occupancy of Space Maximum Area, m2 Distance Limits, m
Assembly occupancy 150 15
Residential occupancy 100 15
Business and personal services occupancy 200 25
Mercantile occupancy 150 15
Medium-hazard industrial occupancy 150 10
Low-hazard industrial occupancy 200 15
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
Understand this provision in seconds
BUILDAiD Assist explains any article of the building code in plain English — with exact citations, exceptions and related requirements.
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.