What is the purpose of stops on an extension ladder?

What is the purpose of stops on an extension ladder?

• A. Halyard
• B. Hooks on roof ladder
• C. Prevent overextension of fly section
• D. Rungs

Answer: (C)

Stops on an extension ladder prevent the fly section from extending beyond its safe limit. An extension ladder has a base portion and a sliding fly portion; the stops engage with the rails to lock the ladder at the chosen height and to keep the sections properly overlapped. This keeps the ladder from extending too far, preserving stability and the integrity of the overlap, which helps prevent failure or instability when the ladder is in use. The other features mentioned aren’t about controlling extension: a halyard is a rope used to raise or lower ladders, hooks on a roof ladder are for securing to a roof edge, and rungs are simply the steps you climb.