What method can you use to determine safe slinging points of a load?

The correct choice highlights the importance of conducting a test lift to determine safe slinging points of a load. A test lift involves briefly raising the load with the slings attached but not hoisting it fully, allowing an operator to observe how the load behaves. This method helps identify the most stable and secure points for slinging by ensuring that the load remains balanced and that the rigging does not shift or slip during the lift.

Using a test lift is particularly valuable because it provides real-time feedback on the load's center of gravity and stability, which can be difficult to assess through visual inspection alone. It also helps confirm that the chosen slinging points can adequately support the weight and dynamics of the load during lifting.

In contrast, visual assessment may offer initial insights into the load's structure and slinging points but lacks the definitive evidence that a test lift provides regarding the stability and safety of the lift. Weight estimation, while important for capacity considerations, does not directly inform the optimal slinging points or the behavior of the load once lifted. Consulting a supervisor can be useful for guidance but, in practice, does not replace the need for direct observation and testing of the load's response during a test lift.