What are the locking mechanisms to keep a fly section from extending past the bed section called?

The locking mechanisms that prevent a fly section from extending beyond the bed section are referred to as "stops." These devices are essential in maintaining control and stability during the deployment and retraction of aerial devices in fire service ladders. Stops are designed to allow the fly to extend to a certain point while preventing any further movement that could lead to instability or accidents.

In practical terms, stops function to ensure that the ladder is safely and effectively positioned when in use, allowing firefighters to operate at various heights without risking the ladder collapsing or becoming unstable due to over-extension. Proper use of stops ensures a controlled deployment, which is crucial for safety in emergency situations.