UFC 3-600-01
17 April 2003
with change 16 January 2004
TABLE 4-1
Sprinkler System and Water Supply Design Requirements for Sprinklered
Facilities
SPRINKLER SYSTEM
HOSE
DURATION
DESIGN
DESIGN AREA
OCCUPANCY
STREAM
OF
CLASSIFICATIONa DENSITY
m (ft)
ALLOWANCE
SUPPLY
L/min/m
L/Min (GPM)
Minutes
(GPM/ft)
280b (3000)b
Light Hazard
4.1 (0.10)
950 (250)
60
Ordinary Hazard
280b (3000)b
6.1 (0.15)
1900 (500)
60
Group 1
Ordinary Hazard
280b (3000)b
1900 (500)
90
8.2 (0.20)
Group 2
Extra Hazard
12.2 (0.30)
280 (3000)
2840 (750)
120
Group 1
Extra Hazard
16.3 (0.40)
280 (3000)
2840 (750)
120
Group 2
a
Refer to Appendix B for occupancy hazard classification.
b
Where listed quick-response sprinklers are used throughout the system, the design area in
Table 4-1 may be permitted to be reduced without revising the density as permitted in NFPA 13
except for facilities that are required to comply with UFC 4-010-01, DoD Minimum Antiterrorism
Standards for Buildings.
Note: The protection requirements identified in Table 4-1 are based on standard commercial
practices followed throughout civilian industry for highly protected risk (HPR) properties. Table
4-1 represents the minimum requirements necessary to establish minimum comprehensive life,
mission, and property loss prevention. Table 4-1 was adapted as a result from detailed studies
by Factory Mutual of loss experience from 1956 to 1965, loss experience in selected
occupancies from 1966 to 1977 and from 1981-1990, and fire test data.
4-2.3.2
Sprinkler Design Area Adjustments.
4-2.3.2.1
For dry pipe systems, the design area of sprinkler operation in
Table 4-1 must be increased by 30 percent per NFPA 13.
4-2.3.2.2
The design areas in Table 4-1 must be increased by 30% for
sloped ceilings that exceed a pitch of one in six.
4-2.3.3
The use of quick response automatic sprinklers (QRAS) is limited to
wet systems.
4-2.3.4
Hydraulic Calculations. New sprinkler systems protecting areas
of 139 m (1,500 ft) and greater must be designed using hydraulic calculations.
Use of pipe schedule designs is strongly discouraged for any sprinkler system.
Required discharge densities and areas of discharge operation are given in
Table 4-1. Calculations must follow the format of NFPA 13. Pipe friction losses
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