UFC 3-600-01
17 April 2003
with change 16 January 2004
3-7.3.1
Installation Requirements. Hydrants must be installed adjacent
to paved areas, accessible to fire department apparatus. Hydrants must not be
closer than 1 m (3 ft) nor farther than 2.1 m (7 ft) from the roadway shoulder or
curb line. Hydrants must be installed with not less than 150 mm (6-inch)
connection to the supply main, and valved at the connection. Barrels must be
long enough to permit at least 450 mm (18-inch) clearance between the center of
the 115 mm (4-1/2-inch) pumper connection and grade. The ground must be
graded so that any surface drainage is away from the hydrant. Installation must
be in accordance with NFPA 24, except as modified by this UFC. Pumper
connection should be perpendicular to the street to allow straight lined
connection to the pumper. At airfields, the tops of the hydrants should not be
installed more than 610 mm (24 inches) above the level of the adjacent airfield
pavement but in no case must the tops of the hydrants be installed higher than
760 mm (30 inches) above the airfield pavement.
3-7.3.2
Spacing Requirements. A sufficient number of hydrants must be
provided so that hose stream demand can be met without taking more than 4,740
L/min (1,250 gpm) from any single hydrant. Hydrants must also be spaced in
accordance with the following requirements:
All parts of the building exterior must be within 106 m (350 ft) of a
hydrant with consideration given to accessibility and obstructions.
Hydrants must be located with consideration given to emergency
vehicle access.
At least one hydrant must be located within 45 m (150 ft) of the fire
department connection.
Hydrants protecting warehouses must be spaced a maximum of 91
m (300 ft) apart.
Hydrants protecting aircraft hangars must be located at 91 m (300
ft) maximum intervals, and there must be at least one hydrant at
each corner of the hangar.
Hydrants protecting POL storage and distribution facilities must be
spaced at 91 m (300 ft) maximum intervals. Provide a minimum of
two hydrants. Locate hydrants so that protected exposures can be
reached by hose lays not exceeding 91 m (300 ft) in length.
Hydrants protecting aircraft parking and servicing aprons must be
spaced at 91 m (300 ft) maximum intervals along one side.
Hydrants protecting exterior storage must be spaced at 91 m (300
ft) maximum intervals around the perimeter.
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