MIL-HDBK-1032/2
3.7.3
Separation Distance. As an aid to fire prevention and protection,
covered storage facilities shall be separated by the distances described in
paragraph 3.3. Multipurpose warehouses may be constructed as a single
structure. These buildings may include a flammable/hazardous storage area
contiguous to the general warehouse, provided the two storage areas are
separated by a 4-hour fire wall.
Protected Area. Warehouse fire area between fire walls shall
3.7.4
comply with MIL-HDBK-1008 and be subject to the following:
3.7.4.1
General Storage. Warehouse area for storage of materials of
moderate combustibility shall not exceed 40,000 square feet (3716 square
meters [m2]) between fire walls in accordance with DOD 4270.1-M and shall
otherwise conform to NFPA 231. When such warehouses are located at
depot-type activities that furnish supply support to other activities, the
area confined by fire walls may be increased upon a finding and determination
by the Secretary of the Navy (with documentation submitted via cognizant
claimant and NAVFAC fire protection engineers) that:
a) The increased size is required for efficient operation.
b) Additional loss potential has been recognized and is acceptable.
c) Other fire safety features have been designed to compensate for
the additional hazard as far as such design is practical.
3.7.4.2
Flammable/Hazardous Storage. Warehouse areas for storage of
flammable liquids, solids, and/or hazardous chemicals, shall not exceed
20,000 square feet (1858 m2) between fire walls in accordance with DOD
4270.1-M. Fire walls shall have a 4-hour rating.
3.7.5
Sprinkler Systems. Provide automatic fire suppression systems in
accordance with provisions of MIL-HDBK-1008: Carbon Dioxide Extinguishing
Systems, NFPA 12; Halon 1301 Fire Extinguishing Systems, NFPA 12A; Standard
for the Installation of Sprinkler Systems. NFPA 13: Deluge Foam-Water
Sprinkler Systems and Foam-Water Spray Systems, NFPA 16; NFPA 231; and NFPA
231C. Water demand shall be based on the hydraulic design of the sprinkler
system.
3.7.5.1
Storage System Sprinklers. In general purpose, controlled
humidity, refrigerated and other type warehouses where flammable/hazardous
materials are not to be stored, nonadjustable face and flue sprinkler heads
(see Figure 19) are required at or immediately below the 20-, 40-, 60- and
80-foot (6100 mm; 12 190 mm; 18 290 mm; and 24 380 mm) rack levels. Rack
shelving at these levels shall not be adjustable. Additional flue sprinklers
may be required depending upon storage height and its relationship to the
nonadjustable sprinklers. Face and flue sprinkler heads shall be placed at
or below each 108-inch (2745 mm) open frame shelf at the required levels in a
manner which prevents sprinkler head damage during storage operations, as
illustrated in Figure 20. The sprinklers at all other shelf levels shall be
capable of vertical adjustment (Figure 21) using mechanically grooved
fittings. Depending upon Commodity Class and whether the load is
encapsulated, rack systems with clear stacking height (SH) values of less
than 25 feet (7620 mm) from floor to the top of material on the top shelf may
be exempted from the in-rack sprinkler requirement.
46
Previous Page
