Chapter 6 Ground Ladders Flashcards
Why is it important to select carefully when purchasing ground ladders?
The types of ground ladders you purchase will affect fireground operations for 15 years or more
What is the NFPA recommended minimum for ground ladders carried by truck companies?
115 ft.
What two primary factors affect the maintenance of any ladder?
Frequency of use and
Adherence to NFPA 1932
According to the Consumer Product Safety Commission, what type of ground ladder is commonly associated with electrocutions?
Metal ground ladders
Why should ladders be properly spotted or shifted into the correct position before being raised?
Ladders are more easily and safely maneuvered on the ground. Additional movement of a vertical ladder increases the chance of losing stability and striking overhead obstructions
What are the two basic methods of raising ground ladders?
Flat and beam raise
What is the proper climbing angle for a ladder?
Approximately 70 degrees
What is the minimum number of ladders that should be placed to a building
Two
How can personnel extend their horizontal reach while working from a ladder?
Reposition the ladder, or lock in to the ladder with one leg
When laddering a fire escape, how far should the top of the ladder extend above the railing
Maximum of one foot
Metal ground ladders can suddently fail from loss of annealing when exposed to heat or flame as low as ____ degrees F.
200 Degrees
According to NFPA 1932, how often should ground ladders be visually inspected?
Monthly and after each use
How often should you inspect the varnish on wooden ladders?
When should you redo the varnish?
Inspect varnish every 6 months
redo annually—sooner if evidence of damage
What are the average service lines (120-240 volt) to a single-family home commonly insulated with?
Material rated at 600 volts
When raising ground ladders, what ladders should generally be raised 1st?
the largest ladder, requiring the most personnel
Straight ladders with rungs set in the main beams should be raised how?
Rungs away from the building
Extension ladders should be raised with the fly away from the building for what type of ladders?
Metal or fiberglass ladders
Where should the fly be positioned when raising a truss wood extension ladder with the rungs set in the main beam?
Fly between the main section and building.
What should personnel do before moving or shifting large extension ladders? Why?
Capture the halyard
Prevents the dogs from accidentally unlocking
When deciding between two lengths of ladders, what one should you pick and why?
Longer ladder
- It will reach the objective
- improved stability
- visibility above objective
How tall are residential occupancies, floor to floor?
Commercial?
approx 9 feet
approx 10 feet
How far is the average window sill above the floor?
about 3 feet
What is the minimum ladder length needed to reach the windowsill of a second-floor dwelling?
24 ft
In relation to a fire, where should the initial ladder be placed?
Place away or opposite from the locaton of the fire
To compliment ground ladders, consider using aerial devices on any structure equal to or larger than how many stories?
2 stories
What should be done when using a hose stream from a ladder that can not be secured at the top?
Flatter-than-normal angle, and secure the bottom
Most passenger and freight ships require at least a ____foot ladder to reach the railings
50 foot
What 5 size-up considerations should be evaluated when determining ladder placement?
- Priorities
- Selection
- Location
- Length
- Hazards
