How should load weight be verified for irregularly shaped objects?

• A. Estimate by volume and density, using rough approximations
• B. Use rated load from chart or weigh scales; calculate weight from dimensions and material properties; verify CG location; use certified rigging calculations or load cells when available
• C. Rely on crane's maximum lifting capacity and assume it's safe
• D. Weigh the load only after it's suspended

Answer: (B)

Accurate verification of load weight for irregular shapes relies on concrete data and careful calculations to keep the lift within safe limits. Using the rated load from crane charts or actual weigh scales provides a solid, equipment-specific reference for what the crane can handle in the given setup. When those sources aren’t enough, calculating weight from the object's dimensions and material properties offers an engineering estimate that can be checked against the crane’s rating. Verifying the center of gravity location is essential because an unevenly distributed load shifts the forces on the rigging and can cause tipping, swing, or side loading. If available, certified rigging calculations or load cells give validated, real-time verification that the load is within safe limits. This approach combines reliable data, balance considerations, and engineering checks to protect both the equipment and crew. Relying on rough volume estimates, leaning on the crane’s maximum capacity alone, or weighing the load only after it’s suspended misses critical safety checks and can lead to overload or uncontrolled movement.