According to ASME B30.5, who signals a two crane lift?

In a two crane lift scenario, it is critical for the operation to be organized and safe. According to ASME B30.5, the signaling responsibility must be assigned to one designated person. This ensures that there is a clear, unified command structure during the lift, minimizing the chance for confusion or miscommunication among the operators.

Designating a single individual to give signals allows for a streamlined approach where the crane operators can focus on their specific tasks without the distraction of conflicting commands. This individual is typically someone who understands the load dynamics, the capabilities of both cranes, and safety protocols, which is essential in coordinating a safe lift involving multiple pieces of heavy equipment.

The other roles mentioned—main crane operator, safety director, and site engineer—may indeed play vital roles in overseeing the operation, ensuring compliance, and maintaining safety, but the responsibility of signaling falls specifically to the designated person to maintain clear communication and effective control during the lift.