Which load factor is essential for safely binding heavy objects using a lever-type binder?

The load factor of 25 is essential for safely binding heavy objects using a lever-type binder because it provides a safety margin that accounts for dynamic forces, shifts in load, and potential wear or failure of the binder. This factor ensures that the binder can handle not only the static weight of the load but also any additional stresses that may arise during transport or handling. By using a factor of 25, workers can mitigate the risk of unsafe conditions, reduce the likelihood of binder failure, and enhance the overall safety during operations with heavy loads. It is critical in the context of securing heavy objects to ensure that they remain stable and undamaged throughout their movement.