On what percent of tipping are most boom truck load charts based?

Most boom truck load charts are based on a tipping percentage of 85%. This value indicates the maximum allowable load a boom truck can safely handle before tipping occurs. The reason for using this percentage is tied to safety factors; it provides a buffer that accounts for dynamic loads, operator variability, and environmental conditions.

When operators consult load charts, they must ensure that the total load—including weight, attachments, and any additional forces acting on the boom—does not exceed the load rating defined at this 85% tipping threshold. This conservatism is essential in preventing accidents and ensuring safe crane operation, particularly in varying ground conditions and when dealing with unexpected lateral forces.

Understanding that the load charts are calibrated at this percentage helps operators make informed decisions about how much weight can be lifted safely while maintaining stability and preventing tipping, which is crucial for safe crane operations.