For a load chart adjustment, which action must be taken when lifting with a jib?

When lifting with a jib, it is essential to deduct the effective weight of the jib from the load when making load chart adjustments. The reason behind this lies in the need to accurately account for the additional forces and weights that the crane system is managing.

The load chart is a crucial tool that provides comprehensive information about the lifting capacity of the crane at various radii and configurations. When a jib is added to the crane, it changes the dynamics of weight distribution and load capacity. Therefore, to ensure safe lifting practices and to avoid overloading the crane, the effective weight of the jib must be considered. By deducting this weight, the operator can determine the true load being lifted, which ensures that the crane operates within its designated safe operating parameters.

Neglecting the jib weight could lead to significant safety hazards, including tipping over the crane or exceeding its load limits. Thus, accurately adjusting for the effective weight of the jib is a critical step in maintaining operational safety and compliance with recommended practices.