Portal crane It is mainly applied to the loading and unloading of various articles, with strong applicability, wide application, good weighing effect and high site utilization rate. With metal material and structure like a door frame, it can walk on the ground track. Safe operation rules can effectively play a better application rate, follow the safety system and abide by the operation rules. 1, when the gantry crane operates, lifting and landing heavy objects, unclear sight and close personnel need continuous alarm and alarm. 2, if the power is suddenly cut off during the working process, all control knob should be reset to zero. After the power is restored to normal, the operation of the gantry crane is checked again. 3, no matter how the weight of lifting objects is, a crane does not allow two objects to be hoisted simultaneously. 4, strictly abide by the "no hanging, five no hanging" system. 5, the operator needs formal training, and holds a certificate. He must not be alone in driving without training or examination. 6, when the hook is raised to a certain extent, it is necessary to put the control handle of the gantry crane at "zero" to prevent the impact of the wind ambassador's hook head. After cutting off the total power supply, the driver completes the record of the shift shift and closes the doors and windows.