2000 APRIL - Laserfiche WebLink

20.08.049 ._._. sprinklers shall be installed in ac- cordance with the listing limita- tions. Sec. 9.406 Pipe Sizing 404.2 Side wall sprinklers shall be positioned so that the deflectors aze within 4 to 6 inches from the ceiling or as listed. 404.3 *Sprinklers shall be posi- tioned so that the response time and dischazge aze not unduly affected by obstructions such as ceiling slope, beams, or light fixtures. See Table 3. 404.4 Pilot fire sprinkler protection and fire detection shall be provided in all attic spaces. Pilot fire sprinkler locations shall be neaz heat or fire sources, i.e., HVAC equipment, water heaters, kitchen duct/exhaust penetrations, or other electrical or gas fired equipment, etc. 404.5 Pilot fire sprinkler sprig ups or risers shall be braced in accor- dance with pipe manufacturers rec- ommendations for vertical support and within 4 to 6 inches of the fire sprinkler when the vertical riser ex- ceeds 30 inches vertically. Sec. 9.405 System Type 405.1 Wet Pipe Systems A wet-pipe system shall be used for all residential fire sprinkler sys- tems. 406.1 Piping shall be sized based on sprinkler(s) hydraulic demand. If more than one (1) design dischazge is required the pipe sizing procedure shall be repeated for each design dis- chazge. Exception: When piping is sized hydraulically, calculations shall be made in accordance with the meth- ods described in NFPA 13, Stan- dazd for the Installation of Sprin- kler Systems. Reference appropri- ate friction loss tables. 406.2 Minimum pipe size shall be 3/4 inch for copper or brass, and 3/a inch for plastic (CPVC). 406.3 *To size piping for systems connected to a city water supply, the hydraulically calculated or pipe size method is acceptable. 406.3.1 Establish system flow rate in accordance with Sec 9.401. 406.3.2 Determine water pressure in the street. 406.3.3 Select pipe sizes. 406.3.4 Deduct meter pressure. 406.3.5 Deduct pressure loss for elevation. (Building height above street feet x 0.434 = psi), (Building height above street in meters x 0.098 - bazs). '700_9 (Pleasanton April 2000)