Load radius is the distance from the center of gravity of the suspended load to which point?

The load radius is defined as the horizontal distance from the center of rotation of the crane to the center of gravity of the suspended load. Understanding this concept is crucial for safe crane operation, as it directly impacts the stability and lifting capability of the crane.

When the load radius increases, the crane experiences greater leverage, which can affect its stability. By measuring from the center of rotation, operators can accurately assess the point at which the load will exert force on the crane, helping to ensure that the lift does not exceed the crane's rated capacity. This measurement plays a vital role in determining the appropriate lift charts and safety margins during crane operations, making it essential knowledge for anyone involved in operating or working around cranes.

Other points mentioned in the options, such as ground level, the operator's position, and the load chart, relate to different aspects of crane operation but do not accurately define the load radius as it is specifically the distance to the center of rotation that establishes this critical measurement.