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 MIL-HDBK-1008B
APPENDIX D (Continued)
Type of Construction
Value
Type I
1
Type II
2
Type III
3
Type IV
2
Type V
5
(c) Number of Stories. Fire fighting is more difficult for
multistory buildings. Furthermore, fire spreads faster vertically than
horizontally. Fire in multistory buildings are more difficult to contain and
have higher water demands. One-story buildings with high ceiling heights (20
feet or greater) shall be considered multistory. 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 floor
more than two; maximum 6
points)
(d) Separation Distances. The model building codes and NFPA 80A
provide that a separation distance of 60 feet or more does not require
protection of exterior wall from exposure. The codes indicate that a
separation distance of 20 feet or less requires one hour or more fire
resistance construction. Water demand for protecting exposed facilities
increases as separation distance decrease. In addition, exterior fire
fighting is hampered as building separation distances are reduced. The
weighted values for the building separation distances are as follows:
Separation Distances (Feet)
Value
60 or more
1
21 to 59
2
20 or less
4
68
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