OSHA 10-Hour Construction ReviewFocus Four HazardsMedium
A worker is using a portable ladder to access a platform 16 feet high. What is the minimum height the ladder's side rails must extend above the upper landing surface?
- A2 feet
- B3 feet
- C1 foot
- D4 feet
Show answer & explanationAnswer & explanation
Correct answer: B. 3 feet
OSHA 1926.1053(b)(1) requires that the side rails of a portable ladder used to access an upper landing surface extend at least 3 feet (0.9 m) above that surface. This provides a stable grab point for workers as they transition on and off the ladder.
Why the other options are wrong
- A. 2 feet is still less than the OSHA minimum requirement for stability.
- C. 1 foot is insufficient for safe access and egress.
- D. 4 feet is safer, but 3 feet is the minimum required by OSHA.
Ladder Extension Rule
Portable ladder side rails must extend at least 3 feet above the upper landing surface.
- Provides handhold for safe transition.
- Prevents falls during mounting/dismounting.
- Applies to all ladders used for access to an elevated surface.
Memory trick: Three feet high, reach for the sky (safely).