UFC 3-600-01
17 April 2003
with change 16 January 2004
C-1.2.1.5
Building Floor Area. Firefighting water demands are higher for
larger unsprinklered buildings. The weighted values for the building floor area
factor are as follows:
Area (square meter) (square feet)
Value
697 (7500) or less
1
697.1 (7501) to 1394 (15,000)
2
1394.1 (15,001) to 2323 (25,000)
3
2323.1 (25,001) to 3716 (40,000)
4
Greater than 3716 (40,000)
5
C-1.2.1.6
Firefighting Access. Studies conducted by fire departments have
demonstrated that a responding engine company needs to be within 55 m (180
ft) of a fire to effectively control it. This distance is based on the use of a 9.2 m
(30-ft) stream of water and 45 m (150 ft) of fire hose. The fire hose distance
must be measured, as the hose would lie over the terrain from the fire apparatus.
Ideally, this distance should be to any part of the first three stories of a building,
either by use of ground ladders through windows or by use of windows. The
efficiency of the manual approach is reduced as more hose connections are
required. The weighted values for firefighting access based on hose layout
distances are as follows:
Maximum Hose Layout (meter) (feet)
Value
(first three stories)
55 (180)or less
1
55.1 (181) to 70 (230)
2
Greater than 70 (230)
4
C-1.3
Step Three - Determine Fire Flow and Duration. Using the
occupancy classification and summation of weighted values of the six factors;
select the required water demand for fire flow and duration from Table C-1.
C-91
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