SafetyQuestion 358 of 360
A plumber sets a straight (extension) ladder to reach a roof to service a vent. How should the ladder be positioned for safe use?
a.At about a 4-to-1 pitch (1 foot out for every 4 feet of height) and extending at least 3 feet above the landing
b.Nearly vertical against the wall to save space
c.At a 1-to-1 angle for easy climbing
d.Leaning at any angle as long as someone holds it
Explanation
Cal/OSHA ladder rules call for a non-self-supporting ladder to be set at about a 4:1 ratio, one foot of base out for every four feet of working height, and to extend at least 3 feet above the upper landing so the user has a handhold when stepping off. Too steep risks tipping backward; too shallow risks the base sliding out. The ladder must also be on firm, level footing and secured.
Law Reference: Cal/OSHA Title 8 §1675Practice all 360 questions free — no signup required.
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