The Ontario Building Code | Closures
9.10.13.1. Closures
(1) Except as provided in Article 9.10.13.2., openings in required fire separations shall be protected with a closureconforming to Table 9.10.13.1. and shall be installed in conformance with NFPA 80, "Fire Doors and Other Opening Protectives", unless otherwise specified in this Part.
Table 9.10.13.1.
Fire-Protection Ratings for Closures
Forming Part of Sentence 9.10.13.1.(1)
| Item | Column 1 Required Fire-Resistance Rating of Fire Separation | Column 2 Required Fire-Protection Rating of Closure |
| 1. | 30 or 45 min | 20 min(1) |
| 2. | 1 h | 45 min(1) |
| 3. | 1.5 h | 1 h |
| 4. | 2 h | 1.5 h |
| 5. | 3 h | 2 h |
| 6. | 4 h | 3 h |
Notes to Table 9.10.13.1.:
(1) See Article 9.10.13.2.
In Plain Language
Closures, meaning fire-rated doors and similar assemblies used in fire separations, must meet the requirements set out in this article.
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.