Ladders 6 Flashcards
What is the approximate floor area of the TL Basket?
15 sq feet
Which controls allow for smoother positioning over the other?
the pedestal controls are smoother for positioning then the controls in the basket
What is the most effective means of communication between basket and pedestal in a tower ladder?
intercom system
When should test of the intercom system be made?
during daily check of apparatus and at initial stages of placing TL into operation
When can a detailed member to a Tower Ladder operate on the pedestal?
If they are presently assigned to a tower ladder unit or are a qualified chauffeur – tillerman
If the safety belt/life belt of the personal harness is too confining while operating in a tower ladder bucket, what can a member do?
Form a loop, 1 foot in diameter, in a life saving rope around a substantial part of the basket using a bowline to secure the loop, then hook the life belt or personal harness onto this loop
Definition of scrub area:
that area of a building wall which can be touched by the basket
How can you correct the scrub area being reduced by the cab of the apparatus:
park apparatus with the front end angled about 15 degrees from the building line (this will put the cab portion of the apparatus farther away than the rear)
Generally, how should a T.L. be positioned to a building?
Parallel
When is it more advantageous to position apparatus perpindicular to the fire building?
where the ground is of doubtful stability, such as vacant lots or other unpaved areas that may have hidden voids, and plank pads for outriggers are deemed not substantial enough
What is the wall coverage for a properly positioned TL?
wall coverage from grade level or below, up to a maximum basket floor elevation of 70’ (approximately), at the maximum 75 degree angle
the TL basket, while touching a point 32’ horizontally from center of turntalbe, can reach a basket floor elevation of?
65 feet
What is the TL Scrub area for the front of a building that is 60’ high and 50’ wide?
will cover a 100’ frontage on the lower 3 floors of a building
What is the TL scrub area when the center of the turntable is 32’ feet from building wall and the cab is at 15 degree angle from the building line?
7750 square feet
How far below grade can the basket reach?
10’ below grade
When the center line of the turntable is _______ft from a building, there will be sufficient room for basket to be dropped below the horizonatal with the boom perpindicular to the sife of the apparatus
25’
Grades up to _____________ slope may be treated as ground level regarding TL operations.
4% slope
If possible, TL operations on a hill should be facing?
downhill – if facing downhill, turntable past objective, if facing uphill, turntable before objective
Maximum “slope” for TL operation has been set at what by the manufacturer for safe performance?
15% grade
What angle should be TL boom be raised to drain waterway?
60 degrees and drains of waterways and gated inlets opened
What tools must be placed in the TL bucket when being used for ventilation purposes?
axe, halligan, power saw, 6’ hook, life saving rope — study aide: “H.A.S. 6 Lifes”
When operating on a roof of questionable stability with hand tools/saw full use of personal harness and LSR shall be used to limit travel to a radius of no more than _______from basket.
10’ (rope shall be tied to substantial part of basket [other than railing] and operator shall use bowline with 15’ loop)
Where is first cut of peaked roof when using saw from TL basket?
parallel to ridge pole (7 then 11) knockout cut is 4th cut
To expedite placing of TL bucket at window, place apparatus ________ to the objective so that the __________ is in line with the window/target
parallel/basket
To facilitate the removal of incapacitated or obese victims from a TL bucket, position the basket how?
position the top basket rail level with the windowsill or top rail of fire escape
For rescue, where is initial placement of the tower ladder bucket placed in relation to the window or fire escape?
basket is elevated to a point where the MIDDLE railing of basket is level with the window ledge, or level with the top railing of the fire escape (this allows a person to easily step onto the basket floor)
To insure smooth operation of a TL basket maneuver, who should perform the lowering of a vicitim in a bucket if conditions permit?
Pedestal man (diagonal placement of victim in bucket easier and safer)
When fire building is heavily involved on several floors, a heavy stream delivery should generally start where and why is this?
at the lowest level and work upward, effecting a quick knock-down on the way up to the top floor/cockloft area in order to protect members in basket operating at the highest level
What shall be attached to the nozzle on the stang of the TL bucket when a straight stream is ordered?
the stream shaper with a minimum tip size of 1 1/2” nozzle attached
For optimum effectiveness of TL streams, supply water to base of TL at?
200 – 250 PSI
For optimum effectiveness of TL streams, relief valve of TL should be set at?
250 PSI
For optimum effectiveness of TL streams, generally how many sources of water at base of TL?
generally, only 1 source (relay pumper can take water from more than 1 source)
For optimum effectiveness of TL streams, relay pumper adjacent to a TL should have in excess of ______PSI intake pressure with water flowing. This way, the relay pumper can operate in _________ position and still deliver close to _______PSI
80 PSI / Volume / 250 PSI
For optimum effectiveness of TL streams, when necessary to shut down or to regulate pressures, do so where?
At the relay pumper and not at the TL based gated siamese
Which end of the 3 1/2” hose do you stretch to the TL?
Male end
Nozzle pressures of the TL basket should not exceed _______PSI with the relief valve setting of _______PSI?
100 PSI / 250 PSI
For overhaul, where should the TL basket railing be positioned?
slightly below work area
4 things TL bucket should not be use for or done:
1) force timbers or cornices back into building or onto roof – 2) pull/push objects – 3) as a derrick (pivoted beam to lift/move heavy objects) – 4) not rest TL basket against building wall
When cutting cornices from a TL bucket, what two tools are added to the normal compliment of tools?
power saw/bolt cutters
Metal hangers of cornices should be cut when?
last (cut with bolt cutters or saw, bolt cutters usually suffice)
