Box type double girder shipbuilding gantry crane is a gantry crane of large lifting capacity, large span, multi-function, high efficiency. 
Box type double girder shipbuilding gantry crane is used in the step-by-step transportation of the ship body, abutting joint as well as air or in-place turning. The main beam and branch leg are of box structure. 

The main technical characteristics:
1, With single crane, lifting crane,air turning, air level micro switch and other functions
2, Door frame has a single main type and double girder type two kinds for the user to choose from, for the rational use of material, the main beam with variable cross-section optimization design. 
3, Door frame rigid leg has a single column and double column type for the user to choose from .
4, Upper trolley is equipped with double main hook, respectively on two lateral girder, but at the same time independently or lateral movement 0 to 2 m
5, Under trolley has main and secondary hook , placed in the main girder center below .
6, All of the lifting mechanism and operation mechanism adopts frequency control of motor speed .
7 , In order to prevent the storm, is equipped with the wind-poof device , shcu as safe and reliable clamping rail, anchor and anchor chain and so on.
8, Upper and under trolley can work through each other.
9, At the side of rigid leg, top of the main girder with jib crane maintenance, to complete the upper and lower the car's maintenance work
10, For the convenience of drivers and maintenance personnel computer, there has elevator in the rigid leg. 

1. Electric parts are packed by high quality plywood crate, to reduce distortion in conveying; 
2. Main beams, end beams and electric hoist are packed by plastic woven cloth. It can reduce abrasion when transport. 

Delivery: 

1. If the size of whole crane are suitable for container ship, usually by container; 

2. If the size is too big, usually by bulk ship or by container after truncation; 

3. Transport ways are based on reducing cost for you and keep the crane performance!  

1. What's the information should I provide when inquiry?

a: Lift capacity.  b: Lift height.  c: Span.  d: Power source.  f:Working environment. 

More details, more better. If you have the drawing will be very better. 

2. Operating methods for selection?
A: Pendent controller with push buttons.B: Remote control with push buttons
C: Cabin control with joystick.  

3. Can you provide the series lifting tools?
Sure, we can provide any tools other specials you need, please tell us it when enquiry.   

4. How to install the Box type double girder shipbuilding gantry crane?
Our senior engineer can be your side to do the installation guide service and training. Moreover, our best sales can visit your country.

5. Safety device
Overload limiter, Limit Switch (lifting and traveling), Interlock protection device, Buffer, Overhaul cage, Rail clear plate, Protective cover, Bus bar preventer plate, Anticollision device, Main isolating switch, Emergency stop system, Motor overload protection, and so on.