Fire suppression
refers to all tof the tactics and tasks that are performed on the fire scene to achieve the final goal of extinguishing fire.
Defensive Mode
Used on large fires too dangerous to fight from inside.
- exterior attack
- First reduces the brings fire under control
Offensive Mode
Interior attack quickly bringing the fire under control
AFD Offensive
- Take command
- Do primary search
- First line fast aggressive initial attack
- Provide support activities (ventilation)
- Second line back up
- Secure water supply
- Quickly evaluate success and react
AFD Defensive
- Take command
- evaluate fire spread/ write off (no win)
- ID key tactical position
- Prioritize fire streams
- Provide big well placed streams
- pump water
- quick determination on additional resources
- surround and drown
Straight Stream
greater reach than a fog stream, so it can hit the fire from farther away. Penetrates through hot atmosphere
Solid Stream
Continuous column produced by a smooth bore nozzle, greater reach and penetration than a straight stream.
AFD Car Fire
Fire fighter only 50 ft uphill 20ft- shocks 25ft- bumpers
Hood- 45 degree angle 1/3/4- wheel wells, chalk wheels
Passenger/driver- 90 degree angle 1/3/4- slow sweeping motion fog while approaching
AFD Tire Fire
- 5 gallons oil in tire
- Burn it
- Barry it
- Drown it
two dimensional
three dimensional
- spill, pool
2. torch effect drip flow spray
BLEVE (boiling liquid expanding vapor explosion)
propane specs- mercapton added for odor, propane is odorless. 270 to 1 expansion rate 1.5 to 15% flam. range.
- ping
- discoloration
- bulge/bubble
- activation of pressure relief valve
- Increase in pressure relief valve torch
Compressed natural gas
5- 15% flam. range
Equation for GPM
state test- (LxWxH) divided by 100 and % of room involved
real life- (LxW) divided by 3= field
1. amount of water discharged is of sufficient volume.
2. water must actually reach the seat of the fire
type of streams
- solid
- straight
- fog
Direct attack
uses straight or solid hose stream to deliver water directly onto the base of the fire.
in direct attack
used when temp is increasing and poss. flash over is to remove as much heat as possible from the fire atmosphere.
Combination attack
employs both indirect attack and direct attack methods
- cool flash over conditions
- advance and attack main fire body
Master Stream devices
500-1000 GPM
- deck guns
- ground monitors
- elevated master stream devices/ ladder pipe
