Flashcards in Chapter 6, Positioning Aerial Apparatus Deck (27)
When an engine and ladder arrive on scene of a high rise fire, where is the ladder placed?
-if building is less than 5 stories, ladder is positioned outside the engine
-if building is greater than 5 stories, ladder is positioned inside the engine
What is considered to be the proper distance between the objective and the aerial apparatus?
The distance that allows:
-best climbing angle
Long extensions with low angles place max stress on aerial device. How do you prevent this?
Get as close to object as safely possible.
What are "stresses", concerning the aerial device?
Factors that work against the strength of the aerial apparatus (can be static or dynamic; greater when dynamic).
What are the 4 main uses for any aerial device (excluding water towers)?
-access to upper floors
For an aerial ladder, where is the best rescue approach?
Upwind (apparatus should be parked so turntable is upwind of the target).
For a rescue, why should apparatus be positioned at the corner of the building?
-can reach victims on 2 sides of the building
-less vulnerable position if building collapses
What is the hazard of using a solid stream master stream on an aerial device?
Straight stream could place a damaging load stress on aerial device, possibly collapsing device.
What is the preferred master stream use, when conducting a rescue with an aerial apparatus?
The preferred procedure is the wide-angle fog master stream, to push heat or fire away from the aerial while the rescue is in progress.
What is the difference in elevating platform placement during a rescue, when a victim needs to be removed from a building?
-if victim is being lifted over the top rail of platform, place apparatus so that turntable is directly in-line with target
-if victim enters platform through the gate, position turntable a little forward/behind target (gates are on sides)
What are the benefits of positioning the aerial apparatus on the side of the building opposite the fire?
-allows interior attack crews to advance hose lines toward fire from unburned side
-ff retreating will most likely move toward the unburned side
If the aerial device is being used to assist with ventilation on a pitched roof, how should the apparatus be positioned?
It should be positioned, if possible, so that ventilation can be accomplished from the platform or ladder of the aerial device.
When providing access for ventilating a flat roof, where should the aerial device be positioned?
On the unburned side of the structure, as close as possible to the area being ventilated.
How far above the roofline, should the aerial ladder extend?
At least 6 feet (if using platform, then platform floor should be at roof level).
What are the 3 common uses of an aerial device for elevated master streams?
-blitz attack (try to place nozzle in lower part of window)
What are elevated streams most used for?
Why should an apparatus be placed on the corners of the building, during a building fire?
-decrease the chance of collapse
-decrease chance of damage due to radiant heat
What factors should the driver consider, when determining the final operating position of the aerial apparatus?
-surface conditions (soft ground)
-angle/location of aerial device operation
-fire building conditions
What is a vaulted surface, and why should aerial apparatus avoid them?
A vaulted surface is a vault beneath the ground created by underground parking structures/drainage culverts. They are unstable for aerial apparatus.
What is the most common spotting consideration for aerial apparatus in cold weather conditions?
The presence of ice/snow on parking surface.
What does the term "ice shrugging" refer to?
Process used to remove accumulated ice on the aerial device (slowly extend and retract the aerial device).
If aerial apparatus has to be raised during high winds, how should driver spot the apparatus?
-where apparatus is raised to minimum extension needed
-position apparatus so aerial device is used over front or rear of device
How far should distance be between aerial device and electric lines?
At least 10 feet.
The aerial apparatus is most stable when the aerial device is operated in what position?
Operated directly over the front or rear of the vehicle (longitudinal axis).
What is the least stable position for the operation of the aerial device?
At an angle perpendicular to the apparatus.
For rear mounted aerial devices, why is backing the apparatus into position considered to be the preferred method?
It maximizes the reach of the aerial device.