single girder grab overhead crane is mainly used to load and unload loose materials indoor: ore, limestone, slag, pulverized coal, coke and so on, but can not launching operation.  It is a light working level crane, working level only can up to A4, in other words, single girder overhead crane only can work not more than 5 hours/day. So, it also can not be used in big and busy working environment.

Gantry grab crane's lifting capacity covers 2-16T, on the basis of double girder gantry crane or single girder gantry crane, combined with mechanical grab or hydraulic grab, gantry grab crane is used to grab all kinds of loose material outdoor or indoor.

Construction gantry crane mainly used in expressway construction, bridge construction, PowerStation construction, precast beam yard, etc.

Trussed structure single girder gantry crane is trussed structure, can be equipped with single speed and double speed electric hoist.

Grab gantry crane's lifting capacity covers 2-10T, on the basis of double girder gantry crane, combined with electric hoist grab, used to grab all kinds of loose material. the lifting capacity include grab's dead weight.

Manual operation single girder crane mainly used in workshop with no motor power, lifting and cross traveling are driven by hand, equipped with chain hoist. 

Manual operation double girder crane's lifting and cross traveling are driven by hand, equipped with chain hoist. It is mainly used in np power warehouse, workshop and equipment repair place where there is no requirement for transportation speed and efficiency.

Manual operation suspension single girder crane mainly is used in workshop with no motor power, lifting and cross travel are driven by hand, equipped with chain hoist. 

Double girder overhead crane is used to pick up, transport and deposit bulk materials. this crane can be controlled by hand, semi-automation and full automation.