BCAB #1517 - Water Supply, Domestic and Fire Protection, Articles 3.2.5.7, 3.2.5.9, 3.2.5.13, Subsection 7.6.3

September 20, 2000

BCAB #1517

Re: Water Supply, Domestic and Fire Protection, Articles 3.2.5.7, 3.2.5.9, 3.2.5.13, Subsection 7.6.3

Project Description

The appeal involves an installation of a fire sprinkler system (NFPA-13) for a temple, Group A, Division 2 classification. The water supply pipe is proposed to serves both the fire protection systems (standpipe and sprinkler system) and the domestic water for the building.

Reason for Appeal

Articles 3.2.5.7., 3.2.5.9., and 3.2.5.13. require adequate supply of water for fire fighting, either explicitly or through referenced standards. Subsection 7.6.3. requires an adequate water supply for domestic water use.

Appellant's Position

The appellant contends that based on professional hydraulic analysis, the existing 100 mm water service pipe is adequate to supply the combined water requirements for both domestic and fire fighting demands.

Building Official's Position

The Building Official refers to the scope of the NFPA 13 standard covers the design and installation of sprinkler systems. A note to the scope states: "Consult other NFPA standards for additional requirements relating to water supplies" would require the use and application of NFPA 24, Standard for the Installation of Private Fire Service Mains and Their Appurtenances. This standard would require a 150 mm diameter pipe to serve the combined demands.

Appeal Board Decision #1517

The Board does not consider NFPA 24 a direct required reference in the NFPA 13 standard, rather one of the recognized criteria for sizing water supplies. The NFPA 13 standard also recognizes hydraulic design as an acceptable design method. Further, Sentence 7.6.1.1.(1). also recognizes good engineering practice in the design for potable water. Provided the existing 100 mm water supply pipe is able to support the water demands of both fire protection and domestic water systems, the Board considers it acceptable.

George Humphrey, Chair