Port A brief history of the development of gantry crane

Gantry crane along with the development of the port and developed in 1890, the first time the magnitude of immutable fixed  jib crane  mounted rotatable on a narrow pier across the top of the run semi-door seat, become early Hong Kong with a semi-portal cranes with pier width increase, portal and semi-portal cranes parallel development and widespread use of the level luffing jib and luffing system.
After World War II, Hong Kong with a  gantry crane  to facilitate the rapid development of multiple cranes working in parallel on the same boat for generally adopted in the rotating part of the body is connected with the transfer column column gantry cranes, or moving parts through the large bearing aND gate is connected to the bearing pedestal bearing type rotary device to reduce the diameter of the rotating part of the tail, and cover the surface with a reduced dock (valve seat body on the ground projection) of the gantry structure. In the development process,  bridge gantry crane  also gradually extended to similar operating conditions with the port berth and hydropower construction site, etc..