26 September 2006
Sprinkler riser control valves must be readily accessible to the fire
department from the exterior.
Exception: For DLA projects, sprinkler riser control valves must be in separate
exterior riser room (s) and readily accessible to the fire department.
The minimum duration for warehouse facilities must be 120 minutes.
Hose Stream Allowance.
Provide a hose stream allowance of 1900 Lpm (500 gpm).
Bin storage consists of five-sided, open from top or side storage containers,
stacked in rack structures. They are commonly used in automatic storage and
retrieval systems. Bin storage requires unique considerations for fire protection.
Bin storage configurations do not limit oxygen supply. Horizontal flame spread
can be rapid. The narrower the aisles and the higher the storage, the less ceiling
sprinkler water penetration is delivered to control the fire.
Protection of bin storage stacked in rack configuration must be in accordance
with NFPA 13. Combustible bins in racks present a greater fire hazard and
require a 10 percent increase in ceiling density or one additional level of in-rack
sprinklers. Bin storage not stacked in a rack configuration must be protected in
accordance with NFPA 13. Mini-storage and retrieval systems and carousel
storage must be protected in accordance with FM Global Data Sheet 8-33,
Carousel Storage and Retrieval Systems.
Steel columns located within rack storage areas (actually surrounded by racks)
over 929 m2 (10,000 ft2) must be protected by 2-hour fire rated construction, or
applied fireproofing, or by sidewall sprinklers at 3 m (10 ft) elevation intervals
pointing directly at the column and in accordance with NFPA 15.
Fire Area Limitation and Separation.
Warehouse fire areas must not exceed 5,574 m2 (60,000 ft2). Warehouse fire
areas may be increased to 11,148 m2 (120,000 ft2) with the following provisions:
Ceiling sprinkler design area must be increased by 10 percent.
ESFR sprinklers must increase the required number to be
calculated by 10 percent.