Steel Mill Crane Load
Apr 04, 2023
Steel Mill Crane Load
1. Basic load
The basic load refers to the load that always or often acts on the crane structure, including self-weight load, lifting load, inertial horizontal load, and the dynamic load effect that considers the multiplication of the dynamic load coefficient and the corresponding static load.
For some cranes operating with grab buckets (material boxes) or electromagnetic disks, the dynamic load reduction effect of the lifting load due to sudden unloading should be considered.
2. Additional load
Additional load refers to the non-recurring load on the structure of the crane in the steel factory under normal working conditions. Including the maximum wind load acting on the structure under the working state of the crane, the lateral force of the crane's deflection operation, and the temperature load, ice and snow load and certain process loads determined according to the actual situation.
3. Special loads
The special load refers to the maximum load that the structure may be subjected to when the steel mill crane is in a non-working state or the unfavorable load that the structure is accidentally subjected to in a working state.
The former is the maximum wind load and test load in the non-working state of the structure, as well as the installation load, seismic load and certain process loads that are determined according to the actual situation; the latter is the collision load that the crane is subjected to in the working state. wait.
Only the combination of basic loads is considered as combination I, the combination of basic loads and additional loads is considered as combination II, and the combination of basic loads and special loads or all three types of loads is considered as combination III.
Various load combinations are the original basis for the calculation of structural strength and stability. The safety factor of strength and stability must meet the specified values of load combination I, II and III at the same time, and the fatigue strength is only calculated according to load combination I.
