Industrial Crane main beam is an important part for the crane such as overhead crane, gantry crane, port crane, it is the main structure to support and carry the other parts and loads of the crane. The main beam is usually made of steel, has high strength and rigidity, and can withstand the various forces and loads generated by the crane during the working process. The shape and structure of crane main beams vary according to different crane types and work needs. Common main beam forms include box beam, truss beam, cantilever beam and so on. Box beam is the most common form of main beam, its cross section is rectangular or box shape, with high strength and stability. Trussed beams are composed of multiple members to form a grid-like structure with a lighter weight and higher stiffness. A cantilever beam is a structure that extends the main beam to one side for a larger working range. The design and manufacture of crane main beams need to take into account factors such as crane workload, working environment and safety requirements. The size, material and connection mode of the main beam need to be calculated and tested in detail to ensure that it can safely and reliably carry the workload of the crane. At the same time, the main beam also needs to be inspected and maintained regularly to ensure its normal operation and service life.