Brief Introduction:
1. U-type double girder movable gantry crane is applied to general materials handling service in
outdoor freight yard or along railway, such as loading, unloading, lifting and transferring work.
2. As there is more space under legs of gantry crane, it's fit for conveying larger products.
3. Complete safety measures: wind siren, break-proof shaft, overturn-proof, etc.
4. This kind of crane is composed of  gantry crane crab, tralley travelling mechanism, cab and
electric control system.
5. Saddle support isn't needed for U type double beam gantry crane. So overall height of crane
is reduced given certain lifting height.

1. Main girder of gantry crane
    Be welded of steel plates with honeycomb hole,
    connected by high strength precision bolt.
    There is sliding rail for trolley to travel upper the girder
    which is fixed on outrigger by high-tension precision bolt.
2. Traveling mechanism of U type gantry crane
    -consists of driving gear box and passive wheel box
    - the driving gear box supplies power to finish the crane' travelling.
    -What the difference between driving gear box  
     and passive wheel box is that passive wheel box lacks
     transmission structure such as dynamo, resucer and a pair of exposed gear.
3. Cabin of gantry crane
   - Glass window can make the operator see all the working condition and the cabs
       installed in the front and two sides
   - As a group of independent cabin, fixed outside of cab is connected by control
     cable and linkage station which is set up in the cab.

4. Trolley with gantry crane
    - the trolley is assembled with motor, reducer brake, trolley frame, hook, pulley,
       rain cover and other parts.
    - Include lifting mechanism and crossing travelling mechanism.
    - the trolley is strictly designed according to the application and working environment.

5. Electric system of gantry crane
   - Hoisting motor, long traveling motor and hydraulic power motor are included.
   -The whole electric system is controlled by PLC(programmable logic controller).
   -Two operation modes: cabin and remote control.
6. Platform of gantry crane
  The platform is installed in order to maintain the crane, and the protecting guard
    is added to protect the safety of the staff.   
Design and Construction Rules of Double Gieder Gantry Crane:
All of the standards which are required for the crane is based on International standard.
   -The whole electric system is controlled by PLC(programmable logic controller).
   -Two operation modes: cabin and remote control.