A crane operator is preparing to lift a pre-fabricated concrete panel weighing 8,500 kg. The crane's load chart indicates a maximum capacity of 9,000 kg at the required radius and boom length. The ground is level and compacted. What additional factor must the operator consider according to OHS regulations and safe rigging practices before lifting?

Question: A crane operator is preparing to lift a pre-fabricated concrete panel weighing 8,500 kg. The crane's load chart indicates a maximum capacity of 9,000 kg at the required radius and boom length. The ground is level and compacted. What additional factor must the operator consider according to OHS regulations and safe rigging practices before lifting?

Answer options:

• The type of hydraulic oil in the crane's system.
• The specific gravity of the concrete material. ✅ The weight of the rigging components (slings, shackles, spreader bar).
• The ambient air temperature, as it affects engine performance.

Correct answer: The weight of the rigging components (slings, shackles, spreader bar).

Explanation: The weight listed on the load chart is the gross capacity, which includes the weight of the load AND all rigging components (slings, shackles, spreader bar, etc.). The operator must subtract the rigging weight from the gross capacity to determine the net lifting capacity. Neglecting rigging weight can lead to overloading. The other factors are generally not primary considerations for load chart calculations.