An operator is utilizing a 40-metre boom with a capacity of 8,000 kg at 16 metres radius. If the operator decides to shorten the boom to 30 metres while keeping the same 16-metre radius, what will likely happen to the gross lifting capacity according to the load chart?

Question: An operator is utilizing a 40-metre boom with a capacity of 8,000 kg at 16 metres radius. If the operator decides to shorten the boom to 30 metres while keeping the same 16-metre radius, what will likely happen to the gross lifting capacity according to the load chart?

Answer options: ✅ The capacity will increase.

• The capacity will decrease.
• The capacity will remain the same.
• The capacity will become indeterminate due to the change.

Correct answer: The capacity will increase.

Explanation: When the boom length is shortened, for a given operating radius, the crane's structural strength often increases, and tipping stability improves due to reduced leverage on the crane. Therefore, the gross lifting capacity will typically increase for the shorter boom length at the same radius, as reflected in the load chart.