Ch. 11 - Ladders Flashcards
What test evaluates the structural strength of a ladder?
Horizontal-bending test
trussed beam
has a top and bottom rail, joined by truss blocks
I-beam
thick sections at top and bottom, connected by thinner sections; usually made from fiberglass
Solid Beam
one rectangular cross-section
Rung
crosspiece that spans two beams
Tip
Top of the ladder
Butt
end of the ladder
butt spurs
metal spikes attached to the butt
butt plate
swiveling plates attached to the butt
roof hooks
spring-loaded curved metal pieces attached to the tip
what color should the heat sensor label be?
bright
what is the widest section of an extension ladder?
bed
what section of an extension ladder is raised?
fly
what are mechanical locking devices that are used the hold the fly in place?
pawls
what is a staypole?
long metal poles attached to the bed section that help stabilize an extension ladder
what is a bangor ladder?
extension ladder with staypoles
what is a fresno ladder used for?
attic access
how often should ladders be inspected?
monthly
how often should ladders be service tested?
annually
What do all the firefighters do during the raise of a ladder when it nears chest height in the three-fire fighter flat shoulder carry?
pivot into the ladder
What is the correct ratio for ladder height to distance from the building?
4:1
Who should replace halyards and wire cables on ladders?
only certified technicians
NFPA performance standard for aerial ladders
1901
What parts of ground ladders can be painted for visibility and identification?
top and bottom 18 inches
What is the floor-to-floor height of a commercial building?
10-12 feet
What do the stops do on an extension ladder?
prevent fly sections from overextending
Can a free-hanging roof ladder support the weight of fire fighters with just the hooks?
no
The two-fire fighter shoulder carry is generally used with extension ladders up to…?
35 ft
On the two-fighter shoulder carry, what should the fire fighter closest to the butt do?
cover the butt spur
How many feet of ladders should a truck carrY?
115
