What personnel are typically involved in crane operations?

The personnel typically involved in crane operations include an operator, a lead rigger, and two riggers with one designated as a signalman. This answer is correct because it encompasses the essential roles that contribute to safe and effective crane operation.

The operator is responsible for controlling the crane and ensuring its operation is safe and efficient. The lead rigger oversees the rigging process, ensuring that loads are securely attached to the crane and that all safety protocols are followed during lifting operations. Having multiple riggers provides additional manpower for properly rigging the load and maintaining communication during the lift, while the presence of a signalman helps facilitate clear communication between the operator and the riggers, especially in situations where visibility may be limited.

This combination of roles reflects industry best practices for crane operations, ensuring that tasks are carried out safely and efficiently while minimizing the risk of accidents or injuries. Other options listed do not cover the full spectrum of roles typically needed during crane operations, which is why they fall short of the complete approach required for safe operations.