Figure 7. Fire Division symbols
b. Fire Divisions are numbered 1 through 4 and are synonymous with Hazard Classes 1.1 through
1.4. The lower the Fire Division number, the greater the hazard.
FIRE DIVISION 1:
Mass detonation. Examples are: bulk high explosives (TNT, C-4),
FIRE DIVISION 2:
Explosion with fragment hazard. Examples are: grenades, WP, hand and
rifle; mine, APERS, M16; simulators, M115A2.
FIRE DIVISION 3:
Mass fire. Examples are: grenades, HC, smoke pots, rocket motors,
FIRE DIVISION 4:
Moderate fire. Examples are: commercial squibs, cartridge igniter M2,
4. Chemical Hazard Symbols: Chemical Hazard symbols are used in addition to the Fire Division
symbols. Their purpose is to alert firefighters of special hazards. Chemical Hazard symbols are
posted in addition to Fire Division symbols. They indicate added hazards requiring preparation and
precautions in case of fire. See Figure 8, page 12.
a. The Chemical Hazard symbols indicate the chemical agent stored in the marked location. They
are displayed with the Fire Division symbols. When one of the symbols is displayed, an
additional symbol will be displayed that pertains to firefighting only. Figure 9, page 12 lists the
chemical agents, protective clothing sets required, and the Chemical Hazard symbol required.