What is a primary requirement for special signals according to ASME B30.5?

The primary requirement for special signals, as outlined by ASME B30.5, emphasizes that they must be clear and not conflict with standard signals. This clarity is essential for ensuring effective communication among the crew operating the equipment and mitigating any potential misunderstandings during lifting operations. When special signals are clear, they facilitate swift and accurate responses from signal persons and operators, which is critical in maintaining safety on the job site.

Conflicting signals can result in dangerous situations, as they might create confusion about the intended actions during equipment operation. Therefore, it is crucial that any special signals introduced are easily understood and directly complement the established standard signals, ensuring a seamless flow of communication that prioritizes safety. This principle helps prevent accidents and enhances the efficiency of crane operations by ensuring everyone involved is on the same page regarding the commands being issued.