BCAB #1332 - Combustible Water Distribution Piping in Fire Rated Assemblies, Article 18.104.22.168. & Sentence 22.214.171.124.(2)
December 15, 1993
Re: Combustible Water Distribution Piping in Fire Rated Assemblies, Article 126.96.36.199. & Sentence 188.8.131.52.(2)
The project in question consists of four storey combustible (wood frame) apartment buildings and a noncombustible high-rise apartment building, all with below-grade parking. It is proposed to use polybutylene (combustible) water distribution piping in these buildings within non fire rated drop ceilings and within fire rated and non fire rated walls within storeys.
Reason for Appeal
Except as permitted in Sentence 184.108.40.206.(2), piping that penetrates a fire separation must be noncombustible unless the assembly it penetrates has been tested incorporating the penetration. The exception in Sentence 220.127.116.11.(2) permits combustible water distribution piping not more than 30 mm in diameter to partly or wholly penetrate a vertical fire separation (wall) provided the penetration is sealed with a fire stop material conforming to CAN4-S115, "Standard Method of Tests of Fire Stop Systems".
The appellant contends that all the buildings in this project should be permitted to use combustible water distribution piping within the floor area of each storey. This piping can penetrate and run within the fire separations on each storey provided the penetrations are fire stopped with materials conforming to CAN4-S115. The vertical risers which run from storey to storey and penetrate the horizontal fire separations (floors) will be noncombustible and the penetrations through the floors will be tightly fitted or fire stopped with materials conforming to CAN4-S115.
Building Official's Position
The building official considers the proposed installation is not in conformance with the Code.
Appeal Board Decision #1332
It is the determination of the Board that the proposed installation is in conformance with the requirements of Article 18.104.22.168. and Sentence 22.214.171.124.(2).
George R. Humphrey, Chair