The working level of the crane, that is, the classification of the crane is determined by the utilization level of the crane and the load status of the crane. The working level of the crane is represented by the symbol A, and its working level is divided into 8 levels, namely A1 ~ A8.
The utilization level of a crane represents the frequency of use of the crane during the entire design life. According to the total number of working cycles during the design life, it is divided into 10 levels from U0 to U9; the load status of the crane is an index indicating the degree of load on the crane , According to the nominal load spectrum coefficient, it is divided into four grades: light, medium, heavy and extra heavy. Considering the utilization level and load status comprehensively, according to the diagonal principle, the crane working level is divided into 8 levels from A1 to A8.
The working level is common to all types of cranes commonly used in enterprise production. In order to facilitate the majority of lifting operators to understand and master the applicable working levels of cranes, the editor of our factory lists the commonly used crane working levels for everyone, as shown in the following table.
Examples of crane work levels
| Crane type | Tingkat kerja | ||
| Jembatan derek | Jenis pengait | For power station installation and maintenance | A1～A3 |
| For workshop and warehouse | A3～A5 | ||
| For heavy work workshops and warehouses | A6, A7 | ||
| Ambil | For intermittent loading and unloading | A6 | |
| For continuous loading and unloading | A6～A8 | ||
| Metallurgical special | For hoisting box | A7, A8 | |
| For feeding | A8 | ||
| For casting | A6～A8 | ||
| For forging | A7, A8 | ||
| For quenching | A7, A8 | ||
| For clamps and stripping | A8 | ||
| Uncovered | A7, A8 | ||
| Rake type | A8 | ||
| Electromagnet type | A6～A8 | ||
| Gantry crane | General purpose hook type | A3～A6 | |
| Grab type for loading and unloading | A6～A8 | ||
| Hook type for power station | A2, A3 | ||
| Hook type for shipbuilding installation | A3～A5 | ||
| For loading and unloading containers | A5～A8 | ||
| Loading bridge | Grab bucket type for loading and unloading in stockyard | A7, A8 | |
| Grab type for port loading and unloading | A8 | ||
| For loading and unloading containers in ports | A6～A8 | ||
| Portal crane | Hook type for installation | A3～A5 | |
| Hook type for loading and unloading | A5～A7 | ||
| Grab type for loading and unloading | A6～A8 | ||
| Tower crane | For general construction and installation | A2～A4 | |
| Loading and unloading concrete with hoisting tanks | A4～A6 | ||
| Automobiles, tires, crawlers, railway cranes | Hook type for installation and loading | A1～A4 | |
| Grab type for loading and unloading | A4～A6 | ||
| Deck crane | Jenis pengait | A4～A6 | |
| Grab type or electromagnetic chuck type | A6, A7 | ||
| Floating crane | Hook type for loading and unloading | A5, A6 | |
| Grab type for loading and unloading | A6, A7 | ||
| Shipbuilding installation | A3～A6 | ||
| Cable crane | Hook type for installation | A3～A5 | |
| Hook type for loading and unloading or construction | A5～A7 | ||
| Grab type for loading and unloading or construction | A6～A8 | ||
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