What’re Installation steps of gantry crane ?
(1)Gantry cranes match to assemble main girder, support legs, gear boxes by mark on the ground. After passing examination, install main longitudinal girder on the ground, 
firstly lift the main longitudinal girder in the certain place (mark and distinguish one side main girder and another side girder)and install walking platform
(2) Install the crane gear boxes on the crane rails, alignment with diagonal and fix the gear box. Then lift one side support leg to assemble with wheel box and connect them firmly with pins, then use steel wire rope and chain block to adjust and tighten them and to fix them on the ground anchor. Install the other side support leg with the same way, make two support legs stand vertically on the ground, ensure installation dimension of main girder.
(3) Two truck cranes at the same time lift one side main girder to put it on the support legs, adjust it and use bolts to fix the connection plate at the bottom of the main girder with that of support legs trimmers. Then install the other side main girder. Attention: the truck crane is not allowed to loose hook before the main girder is fixed tightly.
(4) One truck crane lifts connection frames, fix them tightly with bolts
(5) One truck crane lifts trolley and installs it on the rail, adjust it to make its wheel tread contact with rail plane
(6) One truck crane lift driver’s cabin, halfpace, walking platform, handrail and other accessories to the certain position.
(7) Install electrical facilities, pave the electrical lines, remove mooring rope, ground anchor and other equipments. Then start a test run and make a record according to the demand of the quality inspection department.
