UFC 3-600-01
17 April 2003
with change 16 January 2004
and equivalent lengths of pipe for fittings and valves must be in accordance with
NFPA 13.
Note: Additions to existing pipe schedule systems may be
designed using the pipe schedule method.
4-2.3.4.1
The designer (a fire protection engineer) will provide hydraulic
calculations demonstrating that the design will provide an adequate water supply
for the fire extinguishing systems. Hydraulic calculations will be submitted no
later than the 35 percent design submission. Calculations must be based on
recent water flow test data.
4-2.3.5
Sprinkler Coverage. In buildings protected by automatic
sprinklers, sprinklers must provide coverage throughout 100 percent of the
building except as permitted by NFPA 13. This includes, but is not limited to,
telephone rooms, electrical equipment rooms, boiler rooms, switchgear rooms,
transformer rooms, and other electrical and mechanical spaces. Coverage per
sprinkler must be in accordance with NFPA 13, except that it must not exceed
225 square feet for light hazard occupancies or 130 square feet for ordinary
hazard.
Exception 1: Facilities that are designed in accordance with NFPA
13R and NFPA 13D, Installation of Sprinkler Systems in One- and Two-Family
Dwellings and Manufactured Homes.
Exception 2: Sprinklers may be omitted from small rooms in
specific occupancies in accordance with NFPA 101.
4-2.3.6
Strainers. Strainers must be installed where water conditions
warrant, or systems with underground distribution piping flow velocities greater
than 2.4 m/s (8 ft/sec).
4-2.3.7
Interconnection of Risers. For facilities four (4) stories and taller,
there must be a combination sprinkler/standpipe riser in at least two stairwells
that are interconnected on each floor. Each floor control valve assembly for the
sprinkler connection must include a check valve. See Figure 4-1. The sprinkler
system must be hydraulically calculated using the most hydraulically demanding
riser. The calculations must not assume the use of both risers simultaneously.
Exception: For Army projects, sprinkler systems are not required to
be interconnected.
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