OSHA 10-Hour Construction ReviewFocus Four HazardsMedium
A worker is installing siding on the second story of a residential building, approximately 16 feet above the ground. The worker is using an extension ladder to access the work area. How far must the top of the ladder extend above the upper landing surface?
- AAt least 4 feet
- BAt least 3 feet
- CAt least 2 feet
- DAt least 1 foot
Show answer & explanationAnswer & explanation
Correct answer: B. At least 3 feet
OSHA requires that the top of a ladder used to access an upper landing surface must extend at least 3 feet above that surface. This provides a stable handhold for safe transition.
Why the other options are wrong
- A. While more extension can be safer, 4 feet is not the minimum requirement.
- C. 2 feet is not enough to provide a secure handhold and stable transition.
- D. 1 foot is insufficient for safe access and egress from a ladder to a landing.
Ladder Extension Rule
When a ladder is used to access an upper landing surface, its top must extend at least 3 feet (0.9 meters) above that surface to provide a safe handhold for workers.
- Ensures stable transition on and off the ladder.
- Part of general ladder safety guidelines.
- Prevents falls during climbing or dismounting.
Memory trick: Three feet high, reach for the sky.