When should a crane operator never stand under the boom?

A crane operator should never stand under the boom during dismantling or rigging because this is a critical safety precaution. During these activities, the boom or rigging components can shift unexpectedly, potentially leading to equipment failure or accidents. The risk of falling objects or sudden movements is heightened when the crane is being dismantled or when rigging is being adjusted, making it essential for the operator and anyone else in the vicinity to maintain a safe distance.

In contrast, while operating the crane, a qualified operator maintains situational awareness and typically does not position themselves under the boom. During loading, proper procedures ensure that the operator is operating from a safe position rather than underneath the load or boom. Similarly, when performing maintenance, operators often work in designated safe zones and adhere to safety protocols that mitigate risks associated with standing under the boom. Therefore, question focuses on the heightened danger associated with dismantling and rigging, justifying the importance of establishing that specific safety rule.