OSHA 10-Hour Construction ReviewFocus Four HazardsEasy
A worker is installing siding on the second story of a residential building, approximately 15 feet above the ground. They are using an extension ladder to access the work area. What is the minimum required distance the top of the ladder must extend above the landing surface?
- A4 feet
- B2 feet
- C1 foot
- D3 feet
Show answer & explanationAnswer & explanation
Correct answer: D. 3 feet
OSHA regulations (1926.1053(b)(1)) require that the side rails of a portable ladder used to access an upper landing surface must extend at least 3 feet above that landing surface. This provides a stable handhold for ascending and descending.
Why the other options are wrong
- A. While more extension is not necessarily unsafe, 3 feet is the minimum requirement, making this an unnecessarily high standard for the minimum.
- B. This is also insufficient for proper stability and handhold.
- C. This is insufficient for a safe handhold.
Ladder Extension Rule
Portable ladders used to access an upper landing surface must extend a minimum of 3 feet above that landing surface to provide a secure handhold and safe transition for workers.
- Applies to all portable ladders, including extension ladders.
- Ensures stability and ease of access/egress.
- A critical safety measure to prevent falls from ladders.
Memory trick: Three feet high, you'll safely fly.