When the boom length of a crane is between two listed lengths, which capacity should be used?

When the boom length of a crane falls between two listed lengths, it is essential to ensure the crane is operating within safe limits regarding its lifting capacity. The proper approach is to use the capacity corresponding to the next longest or next shortest boom length, whichever is lower. This method ensures that the crane operates safely within its design limits by taking into account that the lifting capacity generally decreases as the boom length increases.

If you were to use the next longest capacity without appropriate considerations, you could exceed the crane's operational limits, posing a significant risk of overload. Conversely, using the next shortest capacity could lead to underutilization of the crane's capability. The method of choosing the lower of the two ensures that safety is prioritized, and it aligns with industry standards that aim to prevent accidents and enhance operational safety in crane operation.