Aerials Flashcards
Rescue priority considerations from windows.
1) Most severely threatened by the current fire conditions
2) Largest number or groups of people
3) Remainder of people in the fire area.
4) People in exposed areas
What is the length for ground ladders on aerials
- NFPA 1901 requires 115 ft of ground ladders min.
Aerial ladder width
- No section is narrower that 18 inches
Emergency stop button platform locations
1) Lower control station
2) Turntable control console
3) Aerial basket controls
Shower valve GPM
-75 GPM
EPU times for (PLATFORMS)
30 min run time 30 min cool down
Aerial generator Watts
10,000 watts
4 operational strategies for aerial apparatus
(REVE)
these are the 4 priority on the fire ground!
1) Rescue
2) Exposure protection
3) Ventilation
4) Elevated fire attack
Aerial tactical uses
- Rescue
- Access to upper floors
- ventilation
- fire suppression
Aerial waterway
- Ensure drain is open
- Internal relief valve for waterway
230-250 psi
Building Rescue choices
1) Interior stairs
2) Reliable exterior fire escapes
3) Ground ladders/ Aerial ladders
Pierce Stick EPU operation times
- 7 min run time/ 30 min cool down
Seagrave EPU operation times
- 5 min run time/ 25 min cool down
- do not run pressure over 2,000 psi
Pierce bedding PSI
- 1800 psi to bedded
Seagrave bedding PSI
- 0 or negative
- Raising the aerial for victim rescue
- Perpendicular is the best ( reduces twisting/torsional stress)
- 70 to 80 degrees preferred (max loading)
50 to 60 degrees is easier - Raise ladder above victim then lower
200 lb victim jumping 3 ft = 700 lbs of force
Tire placement for ladders during operations are
- Front tires must be in contact with the ground
- Rear .5 to 1 inch off the ground
Window rescue
- Aerial Ladder
place tip with the first rung even w/windowsill
4-6 inches off the off the objective - Aerial Platform
place the top rail of the platform even with the bottom sill
Defensive operations
- all firefighters must be cleared and out of the structure
- every 250 gpm will add 1 ton of weight every minute
4 Tactical uses for aerials
R,A,V,F
- Rescue
- Access to upper floors
- Ventilation
- Fire Suppression
Stabilizer for sticks will only correct how many degrees
-3 degrees of slope and grade for sticks
- Aerial apparatus construction
3 main portions
( base, top rails, rungs )
- no section narrower that 18 inches
- rungs placed 14 inches on center
3 types of ladders
1) Aerial ladders
2) Elevating platforms
- Telescoping
- articulating
3) Water towers
Aerial ladder operation order from platform while rasing
Elevate
Rotate
Extend
Aerial ladder operation order from platform while bedding
Retract
Rotate
Lower
Ladder position for VENT
Sticks
ROOF: 6 ft above the roof
Window: tip at the top of the window on the windward side
Platform: even or just above the roofline
Ladder placement for BLITZ attack
- NOZZLE even with the sill 30 degrees
Stabilizer Pads
- 150 PSI without pads
- 75 PSI with pads
PLATFORM ladder set up time
LESS than 110 (stabilizer set)- required to be raised-rotated 90 degrees in 150 seconds or less
STICKS ladder set up time
less than 110 ft
LESS than 110 (stabilizer set)-required to be raised-rotated 90 degrees in 120 seconds or less
STICKS ladder set up time
greater than 110
Greater than 110 (stabilzers set)- required to be raised roatated 90 degrees in 180 sec or less
Stabilizers
L-13
L-21
100%
- 0 to 5 degrees SLOPE
- 0 to 5 degrees GRADE
50%
- 5.1 to 8 SLOPE
- 5.1 to 8 GRADE
Stabilizers
STICKS
full load 100%
- 0 to 3.5 side to side (slope)
- 0 to 5.5 front to rear (grade)
reduced capacity 50%
- 3.6 to 5.5 side to side to side (slope)
- 5.6 to 6.5 front to rear (grade)
- when angles are greater that 5.5 slope or 6.5 grade do not operate the ladder
Tip control speeds
- operates 1/4 the speed that the turntable
What is the greatest stability while ladder is set up
- operating the aerial on the longitudinal axis of the vehicle will offer the greatest stability. (ladder will be over the front or the rear of the cab)
- operating the aerial perpendicular to vehicle creates less stability
