Gantry crane is a kind of deformation of bridge crane. Mainly used
for outdoor cargo yard, yard cargo, bulk cargo handling operations.
It's like a metal door frame structure, bearing beam installed
under two feet, can walk directly in the ground track, the main
girder ends can have overhanging cantilever beam. Gantry crane is
widely used in port freight yard because of its high utilization
ratio, large range of operation, wide adaptability and versatility.