On a load chart, the shaded area denotes which of the following?

On a load chart, the shaded area denotes which of the following?

• A. Structural
• B. Operational
• C. Dynamic
• D. Warning

Answer: (A)

The shaded area on a load chart represents the crane’s structural capacity for the given configuration. It marks the envelope of loads the crane’s frame and components can safely support without overstressing the structure, considering the boom length and radius. In practice, loads inside that shaded region are within the crane’s structural limits, while loads outside would exceed what the structure can safely bear and must not be lifted. Dynamic effects, outriggers, ballast, and operating procedures can further affect what you can lift, but the shading itself highlights the structural strength boundary.

The shaded area on a load chart represents the crane’s structural capacity for the given configuration. It marks the envelope of loads the crane’s frame and components can safely support without overstressing the structure, considering the boom length and radius. In practice, loads inside that shaded region are within the crane’s structural limits, while loads outside would exceed what the structure can safely bear and must not be lifted. Dynamic effects, outriggers, ballast, and operating procedures can further affect what you can lift, but the shading itself highlights the structural strength boundary.