What are the pieces that prevent the fly sections of a ladder from overextending called?

The pieces that prevent the fly sections of a ladder from overextending are known as stops. These stops are critical in ensuring the safe operation of extension ladders, as they limit how far the fly sections can slide out, thus helping to maintain the ladder's structural integrity and stability when in use. Without stops, there is a risk that the ladder could extend too far, potentially leading to accidents, injuries, or damage to the ladder itself.

The design of the stops allows for controlled extension while also providing a reliable mechanism that activates as the ladder is used. Proper understanding and inspection of these components are essential for fire fighters to ensure both their safety and operational efficiency during emergencies.