Gantry Crane

The gantry crane can be classified into general gantry crane, hydropower plant gantry crane, shipbuilding gantry crane, and container crane.

1.General gantry crane
General gantry crane adopts box-type and truss-type structure usually. It’s widely used in handling packed products or bulk materials whose weight is under 100 tons and a span of 4 to 39 meters. General gantry crane with a grab is at a high-level working class, and gantry crane often refers to cranes with hooks, grabs, electric hoists as well as semi-portal cranes.


2.Hydropower plant gantry crane
It mainly used for lifting and opening and closing gates of hydroppower plant, and it also used in installation. Hydropower plant gantry crane has a relatively short span of 8 to 16 meters and elevation capacity of 80 to 500 tons. Its lifting speed is rather slow, about 1 to 5 meters per minute. Its working frequency is low,but it carries a heavy duty when it begin to work. Due to this, we should rise its working grade.

shipyard_gantry_crane


3.Shipbuilding gantry crane
Shipbuilding gantry crane is used in shipyard for assembling the body of a ship. It is usually equipped with two trolleys. One trolley with two main hooks runs on the rail of the top flange of the crane span structure, the other with one main hook and an auxiliary hook runs on the rail of the bottom flange, which is convenient to overturn or elevate sections of a ship. The lifting capacity of shipbuilding gantry crane is 100 to 1500 tons; the span reaches 185 meters; the lifting speed is 2 to 15 meters per minute, which has an additional inching speed of 0.5 meters per minute.


4.Container crane
Container cranes are popular in container terminal. It applys to transporting or stacking goods. The dockers disburden merchandise of the ship on the storage yard, and the crane stack the goods up for transferring to a proper place. To meet the demand of harbors and wharfs, the container cranes usually have a high working grade. Its lifting speed is 8 to 10 meters per minute; the span is depend on the rows of containers, and the maximum span is 60 meters.