What do the stops do on an extension ladder?

The stops on an extension ladder serve to prevent the fly sections from overextending. When the ladder is extended, these stops ensure that the sections cannot move past a designated point, which is critical for maintaining the structural integrity and safety of the ladder while in use. Overextending the fly sections could lead to instability or potential failure of the ladder, which poses significant risks during fire operations or rescues.

While locking extensions in place when extended provides important stability, the primary function of the stops is specifically to regulate how far those sections can extend, ensuring both safety and functionality during firefighting activities. Additionally, the design of the stops also reflects considerations for ease of use and efficient setup, which are essential aspects of ladder operation in emergency situations.