Chapter 7 Ladders Flashcards
What is the best climbing angle when using a ladder ?
70 degrees
What is the height in Residential building (between floors) ?
9 feet
What is the height in commercial buildings (between floors) ?
12 feet
What is the average window sill height above the floor?
3 feet
What is the average window height ?
4 feet
What is the lose of overall ladder length when it is at an angle of 70 Degrees ?
6%
What is the formula to approximate the Butt of a ladder away from a building ?
Working height divided by 4
Where should the tip of the ladder be to ventilate the second story window ?
Tip should be even with the top of the window frame
Where should the firefighter be when ventilating the second story window ?
Just upwind side of the just off of the object
Where should the tip of the ladder be when you are entering and exiting a window to a ladder ?
Tip of ladder should be at or below the window sill
What is NFPA 1932 ?
Fire department ground ladders
Roof operations and ladders - how far above parapet should ladder be placed ?
5 rungs and 1 to 2 inches above parapet
What is the best location for a aerial ladder placement ?
Perpendicular to the building
Where are odd numbers located for North and South running streets ?
East side of street
Where are odd number addresses located on East and West running streets ?
North side of street
What are the three specific items that should be provided in an operations plan ?
number of people, tools and scope of duty
Your personnel level dictates that you must consider all of the following factors ?
experience level of that member
the ability to act independently and protect himself
he presence of a portable radio
At 10 am on a weekday morning, which room at home is likely to contain victims ?
Bedroom
How does a firefighter know which window is to be used as an escape window ?
by completely clearing the laddered window of glass and sash
NFPA 1932 states that a heat indicating label is exposed to what degree of heat ?
330 degrees F
Placement of a elevated platform basket
flat roof with no parapet place basket just on the roof
moderate high parapet, place the basket with the top rail even with the top of the parapet
Parapets higher then 6 ft - try to find another location if possible
Scrub Area ?
the amount of service area that may be physically contacted by an aerial device
Factors effecting scrub area are :
greater the working height of a device the greater the scrub area
the further away from the building the less the scrub area
to close to a building the less scrub area the less scrub area there is to use
Most effective positioning of a rear mounted device is ?
backing into the position and working off the back
What should be kept in mind with Apparatus placement ?
A. Stop the aerial about 15ft from the edge of the building
B. Stop 15 ft from the rear edge of the building
C. Position the vehicle with the anticipated fire travel in mind
What is”Precontrolled Overhaul” ?
This is done when the fire still has the upper hand
15 second / 2 minute Rule ?
If the wall is to hot to keep your hand on it for less then 15 seconds then open up the wall.
2 minutes later the area should be checked again to make sure it has not getting hotter
What is hydraulic overhaul ?
Using the hose line to wash down the entire area.
What is the most important item affecting ladder selection on the fire ground ?
Length
Composite ladders
Can conduct electricity
weight slightly more then other ladders
same load carrying capacity
Stand upto heat well
Roof ladders must be how far above parapet walls
5 rungs and one to two inches out from
Aerial ladders must be ______________ to the building.
Perpendicular
What is the minimum width of ladders?
16 inches
What is the design load of ladders according to NFPA 1932?
Design load of 750 pounds
