What is the primary method for determining the safe lifting capacity of an excavator?

The primary method for determining the safe lifting capacity of an excavator is through the load chart on the excavator. The load chart is specifically designed by the manufacturer to provide detailed information about the machine's lifting capabilities under various conditions. This chart takes into account factors such as the configuration of the excavator, the reach, the angle of the arm, and the weight of the load. It is essential for operators to reference this chart to ensure that they are operating within the safe limits outlined for the specific model they are using.

Using the load chart helps avoid the risks associated with overloading the machine, which can lead to tipping, equipment failure, or accidents. While manufacturer's guidelines and the operator's experience do play a role in safe operation, they do not provide the specific, quantifiable data required to determine lifting capacity like the load chart does. Additionally, a visual inspection of the load is important for ensuring that the load is secure and appropriate, but it does not replace the need for precise calculations that a load chart provides.