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.
For sprinkler systems in residential occupancies,
which are designed to NFPA 13R standards, paragraphs
which address hydraulic design and sprinkler spacing
must be edited according to NFPA 13R requirements.
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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 [280] [_____] square meters [3,000] [_____]
square feet of floor area. The minimum pipe size for branch lines in
gridded systems shall be 32 mm 1-1/4 inch. Hydraulic calculations shall be
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 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
hydraulic calculations to ensure that the system
demand will be met.
Design Calculations: The designer will provide
detailed hydraulic calculations that clearly
demonstrate that the water supply will meet the
demand of the sprinkler system and hose streams.
Calculations will be submitted with the concept
design submission.
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The design of the system shall be based upon a water supply with a static
pressure of [_____], and a flow of [_____] at a residual pressure of
[_____]. Water supply shall be presumed available [at the point of
connection to existing] [at the base of the riser] [_____]. Hydraulic
SECTION 13930A
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