1.4.2
Water Distribution
Distribution shall be uniform throughout the area in which the sprinkler
heads will cover. Discharge from individual heads shall be not less than
100 percent of the specified density.
1.4.3
Density of Application of Water
Size pipe to provide the specified density when the system is discharging
the specified total maximum required flow. Application to horizontal
surfaces below the sprinklers shall be [_____] L/m per sq meter gpm per sq
ft.
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NOTE: The designer shall use the criteria provided
within MIL-HDBK-1008 for guidance with the sprinkler
design area and outside hose allowance requirements.
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1.4.4
Sprinkler Design Area
[Area shall be the hydraulically most remote [_____] sq meter ft area as
defined in NFPA 13.] [Area shall be [as indicated.] [based on the [_____]
meter foot radius rule and shall conform to NFPA 409 for aircraft hangars.]
[_____.]] [For deluge systems, design area shall be the entire area
protected by the system.]
1.4.5
Outside Hose Allowances
Hydraulic calculations shall include an allowance of [_____] L/m gpm for
outside hose streams.
1.4.6
Friction Losses
Calculate losses in piping in accordance with the Hazen-Williams formula
with 'C' value of [120 (deluge)] [100 (preaction)] for steel piping, 150
for copper tubing, and 140 for cement-lined ductile-iron piping. Velocity
in sprinkler piping shall be limited to a maximum of 20 feet per second6
meters per second.
1.4.7
Water Supply
Base hydraulic calculations on a static pressure of [_____] kPa (gage) psig
with [_____] L/m gpm available at a residual pressure of [_____] kPa (gage)
psig at the [junction with the water distribution piping system.] [base of
the sprinkler piping riser.] [Base hydraulic calculations on operation of
fire pumps provided in Section 13920 FIRE PUMPS.]
1.4.8
Detail Drawing
Prepare A1 841 by 594 mm 24 by 36 inch detail working drawings of
sprinkler heads and piping system layout in accordance with NFPA 13,
"Working Drawings (Plans)." Show data essential for proper installation of
each system. Show details, plan view, elevations, and sections of the
systems supply and piping. Show piping schematic of systems supply,
devices, valves, pipe, and fittings. Show location and orientation of
sprinkler heads in relation to obstructions. Show point to point
electrical wiring diagrams. [Submit drawings signed by a registered fire
protection engineer.]
SECTION 13945N
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