BCAB #1404bar - Combustible Water Pipe Penetrating Horizontal Fire Separations, Clause 18.104.22.168.(1)(b) and Article 22.214.171.124
August 17, 1995
Re: Combustible Water Pipe Penetrating Horizontal Fire Separations, Clause 126.96.36.199.(1)(b) and Article 188.8.131.52
This appeal concerns the use of combustible CPVC water distribution pipe in buildings where it will pass through horizontal fire separations.
Reason for Appeal
Sentence 184.108.40.206.(1) requires pipes that " penetrate a membrane forming part of an assembly required to have a fire resistance rating, or a fire separation, shall be sealed by a fire stop system". The fire stop system, when tested in conformance with CAN4-S115-M, "Standard Method of Fire Tests of Fire Stop Systems", has an " F rating not less than the fire protection rating required for closures in the fire separation.". Article 220.127.116.11. further requires pipes to be noncombustible when they partly or wholly penetrate an assembly required to have a fire resistance rating except as permitted in Article 18.104.22.168. Sentence 22.214.171.124.(2) permits combustible water distribution piping not more than 30 mm in diameter to partly or wholly penetrate a vertical fire separation (wall) without being incorporated in the assembly at the time of testing as required by Article 126.96.36.199. provided it is sealed in conformance with Clause 188.8.131.52.(1)(b). In other words, up to 30 mm plastic water pipe can penetrate fire rated walls as long as it is sealed with an S115 fire stop material.
The appellant contends that the particular brand of CPVC water pipe has been tested in a floor assembly (horizontal fire separation) in conformance with Article 184.108.40.206. The test was conducted in conformance with CAN4-S115 and also conforms with Clause 220.127.116.11.(1)(b). It is the appellant's position that because the pipe penetration conforms to both Clause 18.104.22.168.(1)(b) and Article 22.214.171.124., Sentence 126.96.36.199.(2) is not applicable.
Building Official's Position
The building official maintains that combustible water distribution piping is not permitted to penetrate a fire rated floor assembly unless the floor assembly has been tested incorporating the combustible pipe. Such a test must be done in accordance with CAN4-S101-M, "Standard Methods of Fire Endurance Tests of Building Construction and Materials", not the CAN4-S115-M firestop assembly test.
Appeal Board Decision #1404
It is the determination of the Board that the combustible water pipe penetration of a horizontal fire separation must be tested in conformance with CAN4-S101-M in order to comply with Article 188.8.131.52. The "assembly" referred to in Article 184.108.40.206. is the floor or wall assembly through which the pipe passes, not the fire stop system protecting the penetration.
George R. Humphrey, Chair