L gantry crane is mainly composed of gantry, crane crab, trolley travelling mechanism, cab and electric control system. 

The gantry is of a box-shape structure.The crab adopts vertical reaction wheel when the lifting load is below 20t, and horizontal reaction wheel when above 20t to run at the girder side.The girder is of single-girder bias track and the leg is L-shaped SO that the lifting space is large and the spanning ability is strong, making it easy to Covey articles from the span to under the jib. 

The closed cab is employed for operation, where there are adjustable seat, insulating mat on the floor, toughened glass for the window, fire extinguisher, electric fan and auxiliary equipment such as air conditioner,acoustic alarm and interphone which can be furnished as required by users. Simple structure and smaller weight and price. 

Simple erection:sill beam and leg are bo Ited main girderis on leg hangbeamand hoist is under slot steel. 

Operation control is safe and ground con trol and hook speedis conveniently controlled to corer work area.

A Electric hoist frame gantry crane is a box type single girder gantry crane, consists of four parts, for bridge frame, L type 

supporting legs, electric trolley and crane traveling mechanism, and all electric equipment. The control method is cabin, remote 

control and pendent line. And generally for lifting steel ladles, tubes, or other long goods, the L shape structure is very 

convenient for electric trolley traveling and goods overturn.

Single-girder gantry cranes have simple structures, are easy to manufacture and install, have low mass, and their main beams 

are mostly off-track box-type structures. Compared with double-girder gantry cranes, their overall rigidity is weaker. Therefore, 

when the lifting capacity Q≤50t and the span S≤35m, this form can be used. Single-girder gantry crane legs are available in two

 types: L-type and C-type. The L-type is easy to manufacture and install, has good force bearing conditions, and has a small 

mass. However, the space for hoisting goods through the legs is relatively small. The C-type legs are made to be inclined or 

curved in order to have a larger lateral space so that the goods can pass through the legs smoothly.

Features:

Simple and compact structure, steady performance.

Easy to install and high efficiency.

Overload, low voltage protective device. 

Pendent control and remote control.

Easy maintenance.