Shipbuilding box type double girder 50t gantry crane  is a gantry crane of large lifting capacity, large span, multi-function, high efficiency. 

It 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 of shipbuilding box type double girder 50t gantry crane:
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, such 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. 

Packing:

1. Electric parts of shipbuilding box type double girder 50t gantry crane 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!  

It mainly produces Shipbuilding box type double girder 50t gantry crane, beam launcher, movable scaffolding system crane, form traveller, straddle carrier, tyre transportor, beam trolley, portal crane and electric winch, electric hoist and all kinds of accessories, which widly cover machinery, metallurgy, electric power, railway, water conservancy, ports, terminals and other industries.

Huada Heavy Industry  has more than 600 stuff, and covers 200,000 square meters.
Our advantages:
-More than 50 R&D personnels with advanced Science and technology.
-More than 400 sets advanced Production processing equipment and inspection equipment
-Independent intellectual property rights to develop energy saving bridge cranes, gantry cranes, and electric hoist
-Obtain ISO 9001 certificate and more than 10 series of patent certificates
-Efficient service and competitive products
-Export more than 100 countries

1. What's the information should I provide for Shipbuilding box type double girder 50t gantry crane 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 various lifting tools?
Sure, we can provide any tools other specials you need, please tell us it when enquiry.   

4. how to  install the 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.