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addition, the system must have the capability of delivering a minimum of 0.20 gpm per square foot for the most remote 5ยป000 sq. ft. of floor area and have an initial operating pressure of from 80 to 100 psi at the base of the sprinkler riser. Maximum spacing of sprinkler heads shall be 10' and positioning of heads above floor shall be such as to provide complete unobstructed coverage with at least 18" clearance from highest stacking height (from top of highest stored materisuLs).
Water Supply
If the water supply for the records center is of a design whereby both sprinkler protection and fire hydrants are taken from the same source, the water supply system shall be capable of delivering not less than l600 gpm at 65 psi, 2800 gpm at 30 psi, and 3000 gpm at 20 psi. (see Figure I, attached.) The system shall be capable of delivering the maximum capacity requirement (3000 gpm) for a period of at least 3 hours.
A dependable water supply virtually free of interruption is required. This will frequently, but not universally, require a two source system. A single-feed main from the public water system would not be considered a dependable source. Two feeds from different points in. the public system would be considered satisfactory, if dependable facility fire pumps are provided. An on-site reservoir with both electric motor and internal combustion engine driven pumps is another example of a single, but adequately dependable supply. Any two source system with sufficient pressure and capacity in each source is, of course, also satisfactory.
Interior Hose Stations
Interior hose stations connected to the sprinkler system and conforming to the requirements of National Fire Protection Association Standard No. 13 shall be provided in such a manner that any point in the stack area can be reached by a 50-foot hose stream from a ""100foot hose' lay. Each hose -station shall be provided with a rack and reel capable of holding 100 feet of 1 1/2" rubber or latex lined hose. The hose and shut-off type nozzle shall be provided from Federal Supply Schedule after completion of the structure.
Fire Hydrants
Fire hydrants shall be located so that each entrance, or other access to the records center that could be used by firefighters, shall be vithin 250 feet of a fire hydrant. All hydrants shall be at least 50 feet away from the building wall and adjacent to a roadway usable by fire apparatus.