Container Rail Mounted Gantry Crane. 01 Product Name: Container Rail Mounted Gantry Crane. 02 Lifting capacity: 400t, 100t, 130t, 100+100t. 03 Span: 18~36m. 04 Container dimensions: 20′, 40’, 45’. 05 Rail-type container gantry crane or RMG is mainly consists of the steel structure, lifting mechanism, micro-transfer mechanism, spreader