What is the minimum number of positions required to be on every load chart?

Load charts are critical documents in the field of hoisting and lifting operations, as they provide essential information about the crane's capacity under various conditions. These charts help operators make informed decisions regarding safe lifting practices.

The minimum number of positions required to be included on every load chart is four. This typically encompasses the following key parameters: the maximum load capacity at a specific radius, different boom angles, the load capacity when the boom is fully extended, and the capacity when the boom is fully retracted. These factors are crucial to ensuring that the operator understands how the load capacity changes with different configurations of the crane, allowing for safe and effective lifting operations.

In contrast, fewer than four positions would not adequately inform the operator about the crane's capabilities across its operating range, potentially leading to unsafe practices. Hence, having a minimum of four positions on the load chart is essential for safe lifting and compliance with industry standards.