17 Positioning Aerial Devices Flashcards
If the building is less than five stories tall the engine should park on the side of the street closest to the building and the ladder apparatus should park where
On the outside of the engine
If the building is taller than five stories the engine should park on the outside position on the farthest side of the street and the ladder should park where
Closest side of the street
For any given situation the proper distance between the objective in the aerial apparatus is the distance that affords
the maximum stability
best climbing angle
and adequate extension
What affects the distance that the aerial may be positioned from the building
Condition of the building, collapse hazard
Positioning the apparatus in a location that provides the most efficiency for operating on the fire ground
Spotting
When should aerial devices be allowed to be parked on soft surfaces
Only as a last resort
Ground above underground vaults such as parking structures utility chases drainage culvert’s or basements
Vaulted surfaces
What is a good indicator of underground voids
Manhole covers
Extreme heat may do what to paved surfaces
Weaken or soften them
A visual indicator of a compromised asphalt surface due to extreme heat is
Deleting asphalt, creates a shiny glass like surface
Drawbacks of positioning aerial device nose up a hill
Rear compartments harder to reach.
Rear tires off ground, less resistance to sliding
Drawback to positioning aerial rear up a hill
Easier to reach ground with ladder
Front tires lifted, bend frame hard to stow ladder
Moderate to high winds impose what type of load on the aerial device
Dynamic load
How should apparatus be placed in Highwinds
A manner that minimizes extension.
Aerial device position over front or rear of apparatus parallel to wind direction
How far should the aerial device be from powerlines energized at 600-50,000 V
10 feet
How far should aerial device is be from power lines that are 50,000 V or more
50 feet
If you call becomes energized is safer to do what
Stay on or in the vehicle
If you must leave a vehicle that has been energized it must be done under what circumstances
To be a cold becomes a fire hazard
How do you jump from an energized vehicle
Jump clear from it and try to land on both feet falling forward
Apparatus is most stable when the aerial device is operated directly over
The front or back of the vehicle
The greatest stability and a tiller occurs when it is jackknifed approximately how many degrees
60°
Good tiller stability occurs when it is jackknifed up to how many degrees
60-90°
Beyond what degrees does stability decreasing rapidly when jackknifing a tiller
Beyond 90°
Stress tends to be greater when the aerial device is in
Motion
Stress in the aerial device is increased when the ladder rungs are operated perpendicular to the ground or when the apparatus is parked
On an incline and the device must operate off the side of the apparatus. Creating torsion of the ladder
When approaching from the uphill side the apparatus should position how
Drive past fire building with aerial device operating over rear of truck
When approaching from the downhill side the apparatus should be positioned how
Stop short of the building with aerial device operating over front of truck. Optimal position
The maximum loading for any unsupported aerial device occurs when operating at angles between
70 and 80° from horizontal
True false the apparatus should be shut down if it is solely used for providing additional support personnel
True
If water is not available above grade or on an overpass how can water be brought to the scene
Ladder attaches to hydrant below grade or on the street below overpass stretch line up aerial
Apparatus should be positioned at an angle so that the operator side is
Protected from traffic
The front wheel should be turned away from firefighters working on Highway incidents so that
If struck from behind it will not be pushed into them
True false close at least one lane next to the incident lane on highways
True
A second apparatus should be considered for parking behind the initial barrier to act as an additional. How far away
150-200 feet
At night a minimum number of warning lights should be used to prevent
Blinding or distracting other drivers
Most Railway Co. is advise the vehicles be capped at least how far from the tracks whenever possible
At least 25 feet
Aerial device it should be positioned where in regards to railway lines
Same side as incident
If an aerial device needs to be parked on the opposite side of the incident across railroad tracks what should be done
Make sure rail away traffic has been halted. Keep device at least 25 feet above level of tracks as safety precaution
If possible during a medical where should apparatus be parked
Off the street
True false residential driveways and the yards are recommended as stable services for parking apparatus
Faults
Buildings that have been subjected to extensive fire damage or buildings in poor condition before the incident may be subject to
Falling debris or collapse
The collapse on is equal to how many times the building height
1.5 times
Indicators for unstable buildings and potential collapse hazard
Bulging wall . Sagging roof . Large cracks in exterior Falling bricks. Internal collapse
During hazmat incident to not park over manholes or storm drains because
Flammable liquid may flow underground it to system ignite and explode
Many aircraft accidents occur away from
Paved surfaces
When operating at storage tank fires apparatus should never be placed or spotted inside
Inside of the dike that surrounds the tank
Went to aerials responded to a given location the first arriving aerial takes the front of the building and the second goes to
The rear or side depending on access
