Who must be present for the pre-lift discussion when using voice signals?

In a pre-lift discussion that involves using voice signals, it is essential to have a comprehensive understanding among all parties involved in the lift operation. This includes the lift director, who oversees the entire operation and ensures that all safety protocols are followed; the signalman, who is responsible for directing the crane operator and ensuring that communication is clear and effective; and the operator, who ultimately controls the movement of the crane. By having all three roles present, the team can collaboratively assess the lift plan, clarify any potential hazards, and establish clear communication protocols. This collaborative approach enhances safety and efficiency during the lifting operation, as it ensures that everyone is on the same page regarding the signals and procedures to be used.