What must special signals not conflict with according to ASME B30.5?

Special signals must not conflict with standard signals according to ASME B30.5. Standard signals are well-defined and universally understood communication methods used in the crane and rigging industry to ensure safe operations. When special signals are introduced, they should complement standard signals to maintain clarity and consistency in communication, minimizing any potential for misunderstanding or errors during crane operations.

If special signals were to conflict with standard signals, it could lead to confusion among operators and signal persons, which increases the risk of accidents. The emphasis on ensuring alignment between special and standard signals promotes a safer working environment by ensuring everyone on the site interprets the signals in the same way. Thus, by adhering to this guideline, safety is prioritized in lifting operations.