Ladders Flashcards
Name of Ladders
ALACO tapered truss ground ladders
Weights and sizes of extension ladders
12’ 34 lbs
14’ 45 lbs
20’ 86 lbs
35’ 168 lbs
Material beams are made out of
West coast kiln dried Douglas fir
Material rungs are made of
Center swelled hardwood hickory
Material ladder stops are made of
Red oak
How many inches are between each rung
12”
Sections and overlap for 12, 14, 20, 35
12- 2x8 sections 4’ overlap
14- 2x9 sections 4’ overlap
20- 2x12 sections 4’ overlap
35- 2x20 sections 5’ overlap
Uses for 20x
2nd story window, 2nd story roof access, 3rd story window
Uses for 35
3rd story roof/window, 4th story window
How many straight ladders and order on the trailer
2-4-6
20(2)
24(2)
16(2)
Sizes of Straight ladders and weights
16’ 52 lbs
20’ 65lbs
24’ 78 lbs
Uses for 16’ Straight
roof access for single story residential without raised foundation
Uses for 20’ Straight
roof access SSR with raised foundation
Uses for 24’ Straight
commercial roof, window access
What is True Base on a Straight Ladder
Tie Rods Down
Sizes of all Straight Ladders
16, 20, 24
Sizes of all Roof Ladders
10,12,14,16,20
What signifies a roof ladder compared to a straight
roof hooks, a roof ladder is bowed on the truss
What is the proper climbing angle for a ladder
70 degrees or 1/4 length of the ladder
3 Types oof Dogs and which ladders are they found on
12x- free swinging
14x- stationary (fixed)
20 and 35x- Lever action
Halyard size for 20x
1/2 inch
Halyard size for 35x
5/8 inch
Hooks on roof ladders are made of what
chrome steel
Two types of ladder shoes
milled steel ladder shoes and corrugated rubber reinforced w/ tie cord
when are ladders inspected
periodically, monthly and after each use
wood components of the ladder are inspected for what
cracks, marred areas, worn spots, splinters
