How should a signal person indicate that the crane should stop?

Indicating that a crane should stop is crucial for safety during crane operations. The appropriate way to signal the crane operator to stop is by raising both arms horizontally with palms facing forward. This signal is clear and unambiguous, allowing it to be easily recognized from a distance. The horizontal position of the arms demonstrates a stop signal that can be readily perceived, ensuring that the operator understands the urgency of the command.

This method is part of standardized hand signals and is widely recognized in the industry, which emphasizes consistency in communication among workers. The palm-facing-forward aspect reinforces the message, directing the operator to halt the crane's movement immediately and effectively.

Other methods like waving arms or clapping may be less effective due to their potentially ambiguous interpretations or inability to convey a clear stop message. Dropping both arms abruptly might also lead to confusion, as it does not conform to the recognized stopping signals and could be interpreted in various ways. Therefore, the method of raising both arms horizontally with palms facing forward is the most effective and universally accepted way to communicate a stop command to a crane operator.