What is required if a crane manufacturer produces only one model but each unit has a different serial number?

The correct answer highlights the necessity of providing different load/capacity charts for each unit of a crane model, even though they share the same design. Each crane can exhibit variations in performance due to differences in individual construction, materials, or manufacturing tolerances.

Having unique load/capacity charts for each crane ensures that operators are aware of the specific limitations and capabilities of the particular unit they are using. This is crucial for maintaining safety and operational efficiency, as utilizing incorrect load parameters could lead to equipment failure or accidents.

While serialized operational manuals and operator authorization are critical aspects of crane operation, they do not directly address the variations that come from manufactured differences in load-bearing capacity. Different maintenance procedures might be relevant in different conditions or over time, but they do not specifically account for the inherent differences in load capacity that can arise from the serial number assigned to each individual crane.