When lifting from an extension, should you deduct from the load chart?

• A. Yes
• B. No
• C. Sometimes
• D. Not specified

Answer: (B)

The load chart is already specific to the crane’s configuration, including any extension (jib) length. When you lift with an extension, you don’t subtract a fixed amount from the chart; you use the chart that matches the exact extension setting you’re using. The extension changes the lever arm and the crane’s capacity, and that change is reflected in the chart for that extension length. So you read the allowable load for that precise configuration at the given radius and boom angle, rather than deducting a number from a base chart.

In short, use the capacity shown for the exact extension length you have; no additional deduction is required.