UFC 3-600-01
26 September 2006
6.4 (21) to 18 (59)
2
6.1 (20) or less
4
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.
104
Previous Page
