During a trenching operation, an excavator operator needs to carefully place a 1,500 kg pipe section into a trench. The excavator’s lift chart indicates that at a 4-metre load radius, the maximum capacity is 2,000 kg over the side. The operator decides to position the excavator on a slight incline of 5 degrees, perpendicular to the trench, with the uphill side towards the trench. What effect will this incline likely have on the lifting capacity over the side?

Question: During a trenching operation, an excavator operator needs to carefully place a 1,500 kg pipe section into a trench. The excavator’s lift chart indicates that at a 4-metre load radius, the maximum capacity is 2,000 kg over the side. The operator decides to position the excavator on a slight incline of 5 degrees, perpendicular to the trench, with the uphill side towards the trench. What effect will this incline likely have on the lifting capacity over the side?

Answer options:

• It will increase the effective lifting capacity due to better leverage. ✅ It will decrease the effective lifting capacity due to reduced stability.
• It will have no significant effect on the lifting capacity.
• It will only affect the lifting capacity if the incline is greater than 10 degrees.

Correct answer: It will decrease the effective lifting capacity due to reduced stability.

Explanation: Operating an excavator on an incline, especially perpendicular to the lift, significantly reduces its stability and thus its effective lifting capacity. A 5-degree incline, though seemingly small, can be enough to compromise stability. The other options are incorrect as inclines generally reduce stability.