Who is responsible for rigging when a big control valve is pulled?

• A. Crane operator and rigger
• B. Maintenance supervisor
• C. Ground crew
• D. Project engineer

Answer: (A)

The key idea is that lifting heavy equipment requires a clear division of on-site roles: the person who sets up the lift and the person who operator-controls the lift work together to make it safe. The rigger takes responsibility for the rigging plan—selecting the right slings, hooks, chains, and attachments; inspecting gear for wear; choosing the proper configuration based on the valve’s weight and center of gravity; and securing the load so it won’t shift or slip. The crane operator then uses that plan to lift and maneuver the valve, maintaining balance, watching the load path, and following the signal commands. Both roles are essential for a safe lift.

Maintenance supervisors are focused on keeping equipment in good working condition rather than performing rigging tasks. Ground crew may assist with setup and staging but don’t determine rigging methods. Project engineers design and specify requirements, but they don’t perform the on-site rigging during the lift.