You must pass a security check prior to lifting operations: shift changes, shift the driver should shift the problems in detail to take over the driver, and then pay the succession joint inspection crane driver. (1) First check whether total knife switch on the power strip off, do not allow live examination. The number of broken wires or the amount of wear (2) Check the rope, it is more than scrapped. Is there a phenomenon of channeling or laminated Check reel is securely fixed platen. (3) Check the brakes working springs, pins, connecting plate and the opening is intact, the brake may not have stuck phenomenon. (4) The safety devices should be sensitive and reliable. (5) The collector (slider or wheel) in line slide is in good contact sports cable roll should be coordinated with the crane speed. (6) The hook should be flexible rotation level on the beam, hook end fixing nut without loosening. 

palabras clave: Cranes, lifting equipment, Crane,