The Ontario Building Code | Fire Stops

3.1.9.1. Fire Stops

(1) Except as required by Sentences (2) and (3) and permitted by Sentences (4) and (5), penetrations of a fire separation or a membrane forming part of an assembly required to have a fire-resistance rating shall be,

(a) sealed by a fire stop that, when subjected to the fire test method in CAN/ulc-S115, "Fire Tests of Firestop Systems", has an F rating not less than the fire-protection rating required for closuresin the fire separation in conformance with Table 3.1.8.4., or

(b) tightly fitted.

(2) Penetrations of a firewall or a horizontal fire separation that is required to have a fire-resistance rating in conformance with Article 3.2.1.2. shall be sealed at the penetration by a fire stop that, when subjected to the fire test method in CAN/ulc-S115, "Fire Tests of Firestop Systems", has an FT rating not less than the fire-resistance rating required for the fire separation.

(3) Penetrations of a fire separation in conformance with Sentence 3.6.4.2.(2) shall be sealed by a fire stop that, when subjected to the fire test method in CAN/ulc-S115, "Fire Tests of Firestop Systems", has an FT rating not less than the fire-resistance rating required for the fire separation of the assembly.

(4) Sprinklers are permitted to penetrate a fire separation or a membrane forming part of an assembly required to have a fire-resistance rating without having to meet the fire stop requirements of Sentence (1), (2) or (3), provided the annular space created by the penetration of a fire sprinkler is covered by a metal escutcheon plate in accordance with nfpa 13, "installation of Sprinkler Systems".

(5) Unless specifically designed with a fire stop, fire dampers are permitted to penetrate a fire separation or a membrane forming part of an assembly required to have a fire-resistance rating without having to meet the fire stop requirements of Sentence (1), (2) or (3), provided the fire damper is installed in conformance with nfpa 80, "Fire doors and Other opening Protectives".