for buildings in seismic zones 3 and 4, and only
essential and high risk buildings in seismic zone 2.
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Design automatic dry pipe fire extinguishing sprinkler systems in
accordance with the required and advisory provisions of NFPA 13, [by pipe
schedules][or] [hydraulic calculations using the area/density method for
uniform distribution of water over the design area] for [ordinary] [extra]
hazard occupancy. Each system shall include materials, accessories, and
equipment inside and outside the building to provide each system complete
and ready for use. Design and provide each system to give full
consideration to blind spaces, piping, electrical equipment, ducts, and
other construction and equipment in accordance with detailed working
drawings to be submitted for approval. Locate sprinkler heads in a
consistent pattern with ceiling grid, lights, and air supply diffusers.
Devices and equipment for fire protection service shall be UL Fire Prot Dir
listed or FM P7825 approved for use in dry pipe sprinkler systems. [Design
systems for earthquake protection.]
1.3.1
Location of Sprinkler Heads
Spacing of sprinklers and position and orientation of sprinklers in
relation to the ceiling, walls, and obstructions shall conform to NFPA 13
for ordinary hazard occupancy; except for discharge density greater than
136 ml/s per sq meter 0.20 gpm per sq ft the spacing of sprinkler heads
shall not exceed that for extra hazard occupancy. Uniformly space
sprinklers on the branch piping.
1.3.2
Water Distribution
Distribution shall be uniform throughout the area in which the sprinkler
heads will open. Discharge from individual sprinklers in the hydraulically
most remote area shall be not less than 100 percent of the specified
density.
1.3.3
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: Sprinkler designers shall use the criteria
from MIL-HDBK-1008 and not NFPA 13.
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1.3.4
Sprinkler Design Area
Area shall be the hydraulically most remote [_____] sq meter ft area as
defined in NFPA 13.
1.3.5
Outside Hose Allowances
Hydraulic calculations shall include an allowance of [_____] L/m gpm for
outside hose streams.
SECTION 13935N
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