According to ASME B30.5, a two crane lift is signaled by:

In the context of a two-crane lift, ASME B30.5 outlines that signaling should be conducted by one designated person. This individual is responsible for coordinating the movements of both cranes to ensure safety and precision during the lifting operation. The role of the designated person is crucial as they serve as the primary communication point, eliminating confusion and potential miscommunications that could arise if multiple operators were trying to signal independently.

Having a single designated person ensures a consistent and clear line of communication, which is vital during complex maneuvers involving two cranes. This helps maintain focus on safety protocols and minimizes the risk of accidents. Other individuals, like the main crane operator, safety director, or site engineer, may be involved in the lift in different capacities, but the responsibility for signaling specifically lies with the one designated person to maintain streamlined and effective operations.