UFC 3-600-01
17 April 2003
with change 16 January 2004
Type of Construction
Value
Type I
1
Type II
2
Type III
3
Type IV
2
Type V
5
C-1.2.1.3
Number of Stories. Firefighting is more difficult for multi-story
buildings. Furthermore, fire spreads faster vertically than horizontally. Fire in
multi-story buildings is more difficult to contain and has higher water demands.
Consider one-story buildings with high ceiling heights (6.1 m (20 ft) or greater)
multi-story. The weighted values for number of stories of a facility are as follows:
Number of Stories
Value
Single Story
1
Two or more stories
2
(plus 1 point for each additional floor greater than two floors; maximum 6 points)
C-1.2.1.4
Separation Distances. The model building codes and NFPA 80A
provide that a separation distance of 18.3 m (60 ft) or more does not require
protection of exterior wall from exposure. The codes indicate that a separation
distance of 6.1 m (20 ft) or less requires one hour or more fire resistance
construction. Water demand for protecting exposed facilities increases as
separation distance decrease. In addition, exterior firefighting is hampered as
building separation distances are reduced. The weighted values for the building
separation distances are as follows:
Separation Distance
Value
meter (feet)
18.3 (60) or more
1
6.4 (21) to 18 (59)
2
6.1 (20) or less
4
C-90
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