Crane use and maintenance: Before lifting equipment factory, to make identity records. Installation and maintenance of security checks before: checking the integrity of the principal organs of the performance of the device 50-ton crane company, check its main steel structure and coupling pins, bolts visible defects, surface corrosion of inspection equipment used 50-ton crane, Buy 50 tons to form a recording truck crane, installation opinions issued. Crane of structure: bridge cranes. In rectangular space and over the job, and more for workshops, warehouses, open yard loading and unloading goods, etc., have girder cranes, bridge cranes, Cranes bridge, carrying bridges. Girder cranes: Beam cranes including single girder crane and double girder bridge crane.