Area shall be the hydraulically most remote [_____] square meter feet area
as defined by NFPA 13 [and NFPA 231C].
2.2.8
Friction Losses
Calculate losses in pipe in accordance with the Hazen-Williams Formula with
'C' value of 100 for steel pipe [except 120 for steel pipe used in deluge
systems], 150 for copper tube, and 140 for cement lined ductile iron pipe.
2.2.9
Location of Sprinkler Heads
Location of heads in relation to the ceiling and spacing of sprinkler heads
shall conform to NFPA 13 for ordinary hazard occupancy; except for
discharge density of more than 170 mL per second per sq meter 0.25 gpm per
square foot, the spacing of the sprinkler heads shall conform to NFPA 13
for extra hazard occupancy. The spacing of sprinklers on the branch lines
shall be essentially uniform. [Location of in-rack sprinklers shall
conform to NFPA 231C.]
2.2.10
Water Supply
**************************************************************************
NOTE: Select first option if the water supply is
provided directly from the base water distribution
system and show or specify the point of connection.
Select second option if the water supply is provided
from fire pumps dedicated to the AFFF system, which
are taking suction from a static water source.
Select third option if the water supply is provided
from booster fire pumps being supplied from the base
water distribution system, and show or specify the
point of connection to the base system. Edit
Section 13920, "Fire Pumps" and include as part of
the project specification when using the second or
third option.
**************************************************************************
[Base hydraulic calculations on a static pressure of [_____] kPa (gage)
pounds per square inch gage (psig) with [_____] L/m gpm being available at
a residual pressure of [_____] kPa (gage) psig at the point [indicated] [of
connection with the base water distribution system].]
[Base hydraulic calculations on [_____] fire pump(s) running.
Provide fire
pumps as specified in Section 13920 FIRE PUMPS.]
[Base hydraulic calculations on [_____] fire pump(s) running, with a
suction supply having a static pressure of [_____] kPa (gage) psig with
[_____] L/m gpm being available at a residual pressure of [_____] kPa (gage)
psig at the point [indicated] [of connection with the base water
distribution system]. Provide fire pumps as specified in Section 13920
FIRE PUMPS.]
2.2.11
Duration of Discharge
**************************************************************************
NOTE: For sprinkler discharge duration, consult
NFPA 30 and NFPA 231C. For monitors and hose
station discharge duration, consult NFPA 30.
**************************************************************************
SECTION 13958N
Page 18
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