UNDERWRITERS LABORATORIES (UL)
UL Bld Mat Dir
(2004) Building Materials Directory
UL Fire Prot Dir
(2004) Fire Protection Equipment Directory
1.2
GENERAL REQUIREMENTS
Dry pipe sprinkler system shall be provided in [all areas of the building]
[areas indicated on the drawings] [_____]. The sprinkler system shall
provide fire sprinkler protection for the entire area. Except as modified
herein, the system shall be designed and installed in accordance with NFPA
13. Pipe sizes which are not indicated on the drawings shall be determined
by hydraulic calculation. Gridded systems shall not be used. The
Contractor shall design any portion of the sprinkler system that are not
indicated on the drawings including locating sprinklers, piping, and
equipment, and size piping and equipment when this information is not
indicated on the drawings or is not specified herein. The design of the
sprinkler system shall be based on hydraulic calculations, and the other
provisions specified herein.
1.2.1
Hydraulic Design
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NOTE: Applications requiring multiple
densities/design areas must be referred to and shown
on the drawings.
Systems covering 140 square meters (1500 square
feet) or greater will be hydraulically designed.
Only systems less than 140 square meters (1500
square feet) may be designed using the pipe schedule
method of NFPA 13. This section must be edited if
the system is to be designed using the pipe schedule
method.
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The system shall be hydraulically designed to discharge a minimum density
of [_____] L/min per square meter gpm per square foot over the
hydraulically most demanding [360] [_____] square meters [3,900] [_____]
square feet of floor area. Hydraulic calculations shall be provided in
accordance with the Area\Density Method of NFPA 13. Water velocity in the
piping shall not exceed 6 m/s 20 ft/s.
1.2.1.1
Hose Demand
An allowance for exterior hose streams of [_____] L/min gpm shall be added
to the sprinkler system demand [at the fire hydrant shown on the drawings
closest to the point where the water service enters the building] [at the
point of connection to the existing water system]. [An allowance for
interior hose stations of [_____] L/min gpm shall also be added to the
sprinkler system demand.]
1.2.1.2
Basis for Calculations
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NOTE: The design must include an adequate water
supply to meet the sprinkler water demand. The
designer must provide water flow test results and
SECTION 13935A
Page 9
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