What is the function of stops on an extension ladder?

The function of stops on an extension ladder is to prevent overextension of the fly section. These stops are designed to limit how far the fly section can be extended beyond the base section, ensuring that the ladder remains structurally sound and stable while in use. By preventing excessive extension, stops help to maintain the ladder's balance and integrity, reducing the risk of tipping or collapsing when weight is applied. This safety feature is crucial, especially when firefighters are working at heights where stability is paramount for their safety and efficiency during operations.