What is the function of end stops on bridge/crane systems?

• A. End stops limit trolley travel to prevent damage to the hoist or structure and to avoid the load from hitting the end of a runway; ensure safe travel.
• B. A decorative feature.
• C. Unrelated to safety.
• D. Only used in manual mode.

Answer: (A)

End stops are safety devices placed at the ends of a crane runway to limit how far the trolley and hoist can travel. Their main function is to cap trolley movement so the hoist, drive system, and structure aren’t damaged and the load doesn’t reach the end of the rails. By stopping travel before impact, they prevent collisions, excessive shock loads, and potential derailment or structural damage, making all motion along the runway safer. They can be mechanical bumpers or electronic limit switches that halt motion, and they operate in all modes of operation, not just when the system is manual. They are essential for safety, not decorative or unrelated features, and proper setup and maintenance ensure reliable engagement whenever the trolley reaches an end.