What does a hoisting signal using a thumb up and a fist opening and closing indicate?

A hoisting signal using a thumb up combined with a fist that opens and closes indicates that the operator should raise the boom while simultaneously lowering the load. This signal is essential for the coordination between the signal person and the equipment operator, ensuring that operations are performed safely and efficiently.

Raising the boom typically means increasing the height of the lifting device, while lowering the load brings the item being lifted down. This communication is crucial when maneuvering heavy equipment or loads in constrained spaces or busy environments, where miscommunication could lead to accidents.

This signaling convention is standardized to help ensure that everyone on site understands what actions are being requested, thus emphasizing the importance of proper signaling and adherence to safety protocols in hoisting operations.