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3. Application for Specific Hazards
a. Selection of fire extinguishers for pressurized flammable liquids and
pressurized gas fires type of hazard shall be made on the basis of
recommendations by manufacturers of this specialized equipment.
The system used to rate the effectiveness of fire extinguishers on
Class B fires (flammable liquids in depth) is not applicable to these
types of hazards. It has been determined that special nozzle design
and rates of agent application are required to cope with such
hazards.
b. Selection of fire extinguishers for fires involving Class B materials in
motion (three – dimensional Class B fires) such as pouring, running,
or dripping flammable liquids and generally includes vertical as
well as one or more horizontal surfaces shall be made on the basis
of recommendations by manufacturers of this specialized
equipment.
c. Fire extinguishers for the protection of delicate electronic
equipment shall be selected from either a carbon dioxide type or a
halogenated agent type.
G. Distribution of Fire Extinguishers
1. General Requirements
a. Fire extinguishers shall be provided for the protection of both the
building structure and the occupancy hazards contained therein.
b. Required building protection shall be provided by fire extinguishers
suitable for Class A fires.
c. Occupancy hazard protection shall be provided by fire
extinguishers suitable for such Class A, B, C, D, fire potentials as
might be present.
d. Fire extinguishers provided for building protection can be
considered also for the protection of occupancies having a class a
fire potential.
e. Buildings having an occupancy hazard subject to Class B or Class C
fires, or both, shall have a standard complement of Class A fire
extinguishers for building protection, plus additional Class B or Class
A fire extinguishers, or both. Where fire extinguishers have more
than one letter classification (such as 2-A:20-B:C), they can be
considered to satisfy the requirements of each letter class.
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