SafetyQuestion 368 of 1605
When using an extension ladder leaned against a wall, the recommended angle places the base of the ladder approximately what fraction of the working length away from the wall?
a.About one-half
b.About the full working length
c.About one-quarter (the 4-to-1 rule)
d.Directly against the wall with no offset
Explanation
The 4-to-1 rule recommends that for every 4 feet of ladder working length, the base should be set 1 foot out from the wall. This roughly 75-degree angle provides stability and reduces the risk of the ladder slipping.
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Reviewed by Abraham Chen — Licensed California General Contractor (CSLB License #1101856 — verify)