Semi- gantry crane is between the bridge crane and gantry crane between a semi gantry cranes only one leg, the other end of the crane bridge crane like the same frame in the plant crane beam, running on the frame in the plant commonly known Skyrail track on the ground, said ground track orbit. Semi-gantry crane hoisting mechanism, trolley traveling mechanism and bridge structures, bridge cranes with basically the same. Because large span, crane operating agencies were driven mostly used way to prevent the crane operation and increase the resistance generated skew even an accident, in order to prevent the strong wind down the line or tip over, with wind measurement instrument and interlocked with the operating agencies crane rail clamp. Semi-gantry crane is generally hoist type, so nominal weight is usually 16 tons or less.
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