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must not be a minimum of 305 mm (1 ft) above the finished floor level to facilitate
easier cleanup of spills.
Hazardous Materials Storage Areas.
Provide a minimum of 2-hour fire rated construction between hazardous
materials storage areas and those used for storage of flammable and
combustible liquids. These areas must be labeled as "Hazardous Materials
Only," and must also be labeled as to the type of sprinkler protection present in
each room. Provide automatic sprinklers at the ceiling level as well as one
mandatory level of in-rack sprinklers (i.e., in the flue space between the rack and
the wall) located at or slightly above the midpoint with respect to overall storage
height. In hazardous material storage areas not containing flammable or
combustible liquids, design ceiling sprinkler densities based on the storage of
Class IV commodities in NFPA 13. In water reactive areas, provide automatic
sprinklers with an indicating valve to be locked in the closed position. Provide a
metal sign stating the indicating valve is to remain locked in the closed position
unless non-water reactive material is stored in the room. The sign can be
attached to a chain and connected to the indicating valve or fastened
permanently to the wall provided it does not interfere with the operation of the
valve. Locate the indicating valve outside the water reactive storage area.
Hazardous Waste Storage Facilities.
For hazardous waste storage facility requirements, refer to the following:
NFPA 30, Flammable and Combustible Liquids Code
NFPA 430, Storage of Liquid and Solid Oxidizers
NFPA 434, Storage of Pesticides
NFPA 490, Storage of Ammonium Nitrate
Fire Protection for Hazardous Waste Storage Facilities.
The following minimum criteria must be provided:
Exterior Fire Walls
Exterior walls must consist of 4-hour fire resistive construction
when the facility is attached to a structure or it is located within 3 m
(10 ft) of another building or property line.
Exterior walls must consist of 2-hour fire resistive construction
when the facility is located more than 3 m (10 ft) but less than 15.3
m (50 ft) from an important building or property line.