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OFD 01-07
Ch 14: Ladders
33
Other
Not Applicable
02/28/2007

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Term
What is the proper climbing angle in OFD?
Definition
Between 70 and 75 degrees
Term
What is the absolute minimum number of rungs that should be extended above the roofline, parapet, or window sill during firefighting?
Definition
2 rungs is the absolute minimum. Atleast 5 rungs if at all possible.
Term
NFPA 1931
Definition
Design and verification test for fire department ground ladders.
Term
Straight Ladders
Definition
Non-adjustable ladders consisting of one section. Straight ladders utilized by the OFD consist of 12', 14', 16', 20', 22', 24' in lengths found on truck companies. They may have spurs on each end.
Term
Extension Ladders
Definition
Ladders constructed of 2 or more sections. Extension ladders utilized by OFD are 14', 24', 28', 35', 40' in lenghts.
Term
Scaler Ladder
Definition
These ladders are normally used on the roof. They have hooks on the end to secure the ladder over the roof ridge. Scaler ladders utilized by the OFD are 12', 14', 16', 20' in lenghts. Engine compies carry 14' scalers.
Term
Folding Ladder
Definition
Single ladder with hinged rungs. Lengths range from 8' to 16' with 10' being the most common. OFD uses 10'.
Term
Combination Ladder
Definition
Also known as A frame ladder. OFD utilizes 12' and 14' on truck companies
Term
What types of wood are used to construct wooden ladders?
Definition
Coast douglas fir beams, hickory rungs, and red oak wear parts.
Term
What are the 2 different types of beam construction for wooden ladders?
Definition
Tapered truss or solid
Term
Under the provisions of NFPA 1932, which 2 types of ladders are required to carry heat sensors?
Definition
Metal and Fiberglass
Term
What 3 ladders are carried on an Engine Company
Definition
1) 24' Extension ladder
2) 14' Scaler ladder
3) 10' Folding ladder
Term
When throwing extension ladders the fly section should be___?
Definition
Fly section should be in, bed section should be out.
Term
Ladder uses
Definition
Ventilation, Access, Rescue, Stability, Bridging, Elevated streams.
Term
How many inches is the tip of a ladder painted white?
Definition
20 inches
Term
How many inches is the bottom of the ladder painted black?
Definition
20 inches
Term
When throwing a fiberglass extension ladder the fly section should be ___?
Definition
Fly section should be out, bed section should be in.
Term
NFPA 1932
Definition
Use, maintenance and service testing for fire department ground ladders.
Term
How many firefighters are needed to carry and throw a 35 ft extension ladder?
Definition
3 firefighters
Term
How many firefighters are needed to carry and throw a 40 ft extension ladder?
Definition
4 firefighters
Term
A key factor in selecting the correct ladder is the abilty to make a good estimate of the length of ladder required to reach a certain level. A good rule of thumb is?
Definition
Residential buildings are 8 to 10 ft between floors, while commercial building are could be 12 to 15 ft between floors.
Term
How many points of contact must remain on the ladder when climbing a ladder?
Definition
3 points of contact
Term
The cross members of ladders that are used when climbing are ___?
Definition
Rungs
Term
The upper sections of an extension ladder are ___?
Definition
Fly sections
Term
They devices are used to hold the fly section in place once they have been raised?
Definition
Pawls, dogs, or locks
Term
Blocks of wood or metal which prevent the fly sections from being extended too far, are known as ___?
Definition
Stops
Term
A rope or cable used to extend the fly sections, is known as ___?
Definition
Halyard
Term
The side rail of the ladder which is the principal structural member of the ladder, is known as ___?
Definition
Beam
Term
This is the lower section of a ladder?
Definition
Bed section or Base
Term
This is a grooved wheel over which the halyard is drawn when extending the fly section?
Definition
Pulley
Term
When locking into a ladder and you plan on working on your right side, which foot must you lock into the ladder with?
Definition
Left
Term
When climbing a ladder to a roof, what must you do before steping onto the roof?
Definition
Sound the roof for strutural integrity.
Term
A set of retractable ____ is mounted on the end of a roof ladder so it can be placed safely on a steep surface without slipping down.
Definition
Hooks
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