A mobile crane is configured with its main boom and a 10-meter jib offset at 30 degrees. The load chart for the jib indicates a gross capacity of 3,000 kg at the required radius. The lifted load is 2,500 kg. What other deductions must be factored into this lift calculation?

Question: A mobile crane is configured with its main boom and a 10-meter jib offset at 30 degrees. The load chart for the jib indicates a gross capacity of 3,000 kg at the required radius. The lifted load is 2,500 kg. What other deductions must be factored into this lift calculation?

Answer options: ✅ Only the weight of the hook block and headache ball at the end of the jib.

• The weight of the jib itself, the hook block, and the headache ball.
• Only the weight of the rigging directly attached to the load.
• No further deductions, as jib sections are included in the chart capacity.

Correct answer: Only the weight of the hook block and headache ball at the end of the jib.

Explanation: When using a jib, the load chart for the jib usually accounts for the weight of the jib structure itself. Therefore, the primary deductions still needing to be accounted for are the lifting tackle at the jib head, such as the hook block and headache ball, and any auxiliary equipment attached to the load line. CSA Z150 requires accounting for all deductions.