The working level of the specialize crane is a parameter indicating the heavy work of the specialize crane, that is, the parameter indicating the heavy work and full load of the specialize crane in terms of time. The hook type is divided into: A1-A3 (light); A4-A5 (intermediate) ); A6-A7 (heavy) three levels and seven major items.

The working level of the specialize crane is divided into light, medium and heavy.
The size of the working level of the specialize crane is determined by two kinds of capabilities, one is the frequency of use of the specialize crane, which is called the crane utilization level; the other is the size of the load that the specialize crane can bear, which is called the load state of the crane. A specialize crane has a certain total number of working cycles during its useful life. The working cycle of the specialize crane operation is the entire operation process from the preparation of lifting the object to the next lifting of the object. The total number of working cycles represents the utilization degree of the crane, which is one of the basic parameters of crane classification. The total number of duty cycles is the sum of all duty cycles of the crane during its specified service life. Economic, technical and environmental factors are taken into account when determining the appropriate service life, as well as the effects of equipment ageing.
Nowadays, the working level is also an important parameter of the specialize crane. When ordering a specialize crane, we should not only consider whether the tonnage is sufficient, but also consider the usage of the crane and purchase suitable equipment.