STANDARD DETAILS & SPECIFICATIONS | Spec No | SP-6 |
| Rev. Date | 02/05/04 |
SUBJECT: Installation of fire sprinkler systems in dwellings | Eff. Date | 02/05/04 |
| Approved By | ________ |
This standard applies to dwellings (as classified by the California Building Code) where fire sprinkler systems are installed as an approved Alternate Method of Compliance to the provisions of the Fire Code, or when such systems are required under a specific local ordinance. The system design criteria, as set forth in this Standard, is based on total building square footage. Note that all usable spaces such as attached garages, carports, attics used for storage, etc. are included when determining total building square footage.
An approved method of compliance that, in the opinion of the Fire Department, meets the intent of the provisions outlined in the Fire Code.
National Fire Protection Association Standard 13D, Fire Sprinkler Systems in One and Two Family Dwellings and Mobile Homes.
The sprinkler system design and installation shall comply with provisions of the most recent edition of NFPA Standard 13D except as specified in this Standard.
For buildings up to 3600 square feet, the number of design sprinklers shall be in accordance with NFPA Standard 13D.
For buildings 3601 to 6200 square feet, the number of design sprinklers shall include all sprinklers within the most remote room or area up to a maximum of three (3) sprinklers.
Note: If the most remote room or area contains less than three (3) sprinklers, the number of design sprinklers shall include all of the heads within the room. In addition, calculations shall be provided that demonstrate the operation of 3 sprinklers in the most remote room that requires three (3) or more heads for coverage.
For buildings in excess of 6200 square feet, the number of design sprinklers shall include all sprinklers within the most remote room or area up to a maximum of four (4) sprinklers.
Note: If the most remote room or area contains less than four (4) sprinklers, the number of design sprinklers shall include all of the heads within the room. In addition, calculations shall be provided that demonstrate the operation of 4 sprinklers in the most remote room that requires four (4) or more heads for coverage.
The exceptions listed for the locations of sprinklers as per NFPA Standard 13D shall be applicable except as follows:
Fire sprinklers shall be provided in any attached garage, carport, basement or foyer(s).
Attics, crawl spaces, or concealed spaces, with a greater than 22 inch by 30 inch standard utility access opening and/or, if provided with access stairs and/or, if intended to be used for living or storage purposes, shall be provided with fire sprinkler protection.
Attic spaces that contain mechanical equipment such as furnaces and water heaters shall be provided with sprinklers limited to the protection of the equipment itself.
Small closet spaces that contain furnaces, water heaters or other mechanical equipment shall be provided with sprinkler protection regardless of the size of the space.
For buildings in excess of 6200 square feet, a fire department connection (FDC) shall be provided. The location of the FDC shall be (as approved by the Fire Department) on the front side of the residence, and readily accessible from the street or access driveway. The FDC shall consist of at least one 2-1/2" connection and shall be installed in accordance with NFPA Standard 13. Note that if the Building Department or local water purveyor requires a backflow prevention device, it shall be approved and listed for fire service. The FDC shall be painted chrome yellow or equivalent.
Exterior audible water flow alarms shall be provided. Additionally, water flow shall activate either a separate interior audible device that can be heard in all sleeping areas or, through interconnection with the smoke detectors, which will sound an alarm in the sleeping areas.
Water flow switches and control valves shall be electrically monitored when the system includes 100 or more heads. Valve monitoring, water-flow alarm and trouble signals shall be automatically transmitted to an approved central or remote station monitoring service.
Valves controlling the water supply to residential fire sprinkler systems installed in accordance with NFPA Standard #13D shall be distinguishable, accessible, and located adjacent to the structure, proximal to the domestic shut off valve. The main system control valve shall be distinguishable from the domestic valve by means of a permanently attached tag and be of contrasting color (i.e.: red handle for main system, versus black handle for the domestic supply).
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