How should load capacities be evaluated when using a digger derrick?

Evaluating load capacities when using a digger derrick is best achieved by adhering to the Load and Jib Capacities Charts based on boom angle. These charts provide essential information tailored to the specific operational parameters of the machine, including the angle of the boom, which is critical for accurately determining the lift capacity under various conditions. Utilizing these charts ensures that operators adhere to safety standards and avoid exceeding the machine's limits, thereby minimizing the risk of accidents or equipment failure.

While the manufacturer's specifications are important and provide a baseline for equipment capabilities, they may not account for specific operational circumstances or configurations such as boom angle. Observing the load from a distance does not provide any valid information about the actual weight or the safe lifting practices necessary for the operation. Similarly, estimating based on past experiences might lead to unsafe practices, as it can introduce personal biases and does not account for changes in conditions or specifications. Therefore, relying on Load and Jib Capacities Charts is the most accurate and responsible method for evaluating load capacities when using a digger derrick.