Aerial Ladder Flashcards
Ladder length
Retracted, extended , elevated
Retracted - 35.8
Extended - 105
Elevated - 110
Outriggers
Double box beam and jacks
Powered by double acting hydraulic cylinders.
Ladder degrees of elevation.
-5 to 75
Ladder pipe coupling
Electro hydraulic hydro swivel coupling
Ladder pipe material and diameter
Aluminum
5’ - 3.5. 4 sections
.5 reduction per section
Ladder rated flow and pressure
1000 gpm. Nominal 250
Rotation limiting system
Works with interlock system to prevent rotation to a side where outriggers are not fully deployed.
Personal on ladder distance apart
10 feet
Distance from electrical wiring or cable and trees
10 feet
Max wind allowed. / tested
Allowable wind 30 mph
Tested at 55
Ladder testing. How often.
Yearly or after subjected to undue stress.
Inspect all cables pulleys guides etc. …
Daily
Allowable grades of road
Up to 6% full capacity
6-14 50%
Ladder construction.
All steel u brace truss with k brace rungs
Fast idle rpm
1500-1600
Aerial elevation indicator degrees..,
-20 to 80
Ladder sections
Base, inner mid, outer mid, fly
Hydraulic reservoir location
Top of rig behind can’t side cab
Most stable operation position
Off back up to 45 degrees off center line
Slow idle rpm
600
Apparatus leveling indicator
Degrees and capacities
Green 0-3. 100%
Yellow 3.5 - 8 50%
Red 8- 10. No operation
Epu run times
3 minutes continuous
21 sec every 5 min
Hydraulic oil three primary functions
Transmits power
Lubricates system
Cools unit.
Ladder name
LTI AH 110 rear mount aerial.
Tip load. Wet dry
750 dry
600 wet
How often to operate epu
Every ten hours of continuous use
Ladder pipe relief valve. Pressure and diameter
2.5
250 psi
Max level of cribbing outriggers
2 levels
Hydraulic fluid check
Daily inspection.
While cold and ladder stowed
200 lb FF dropping 3 ft to a ladder causes __ of stress
700 lbs
Three types of preserving testing
Manufacturers- FD not involved
Certification. - third party. UL
Acceptance. - FD performs or oversees before final acceptance.
Counter balance valve
Designed to prevent undesirable motion of aerial ladder
Actuator valve
Controls flow from areal to hydraulic cylinders.
Trunnion
The pivoting end of the piston arm
Stack valve
Multidirectional valve in aerial device
Monitor valve
Multidirectional valve in hydraulic systems
