Ladders Placement & Formula Flashcards
What is a safe ladder ratio?
4:1
You are required to use a 20 foot ladder placed up against a building that is 40’ high. At what vertical distance from the base of the building must the ladder be?
5 feet
Scaffolding erected _____ feet above the ground must have guard rails
10
A 9m extension ladder is extended 6.83 m up the side of a wall. How far should the base of the ladder be from the wall?
1.7m
What type of scaffold requires counterweights?
Cantilever
What is the minimum length a scaffold plank must overhang the scaffold transom at each end?
6 inches
What is the minimum length of a ladder required to climb 2.532 m vertically to another floor?
3.7 m
How many touch points on a ladder?
3
Where is the lanyard attached when erecting scaffolds?
above the head
Using a ladder wheel hoist, which of the following methods is used to unload a bucket of hot asphalt?
always one hand on the bucket
In relation to a rolling scaffold measuring 5 ft x 10 ft, which of the following sections should the outriggers be installed?
3rd section
On a metal scaffold, at what height are ties required?
3x the least base
Which of the following materials is not acceptable for rungs on access ladders for chimneys?
aluminum
What kind of plywood can be safely used for the platform of a scaffold?
3/4 inch Douglas fir supported every 4 feet
For a light duty metal scaffold, what are the maximum allowable pounds per square foot?
25 psf
