How about the honeycomb girder gantry crane?
Through setting up the research and development center, cooperating with several universities and purchasing the advanced crane design software, ZZHZ (Zhengzhou Huazhong Construction Machinery Co., Ltd) develops a new type cellular main girder which solves the weaknesses of the large weight of web girder and poor stiffness of truss girder. Also the “ Isosceles Triangle Honeycomb Girder” obtains the national patent which makes a great contributions to the major projects.
1, The instructions of the device
The main parts of honeycomb girder gantry crane include main girder, support leg, crane traveling mechanism, trolleys, ladders, cabinet, electrical control and so on.
2, The descriptions of purpose and application scope
The honeycomb girder gantry crane is used to lift the box girder, web plate, steel rope cage and hydraulic module and other objects. The applicable working temperature is -10℃～+40℃. The altitude should not exceed 2000m, the humidity≤95%. If it is more complicated than the above-mentioned environments, we can provide it as a special order. When the wind speed is greater than Grade 6, prohibit operation. 
3, The device model and functional description:
The MG series of gantry crane made by ZZHZ is a patent product aiming to the bridge construction projects. In the design process, considering the characteristics of small batch, large weight of single girder, power shortage, frequently site-transferring, we try the best to achieve the goal of the simple structure, easy to assemble and dismantling, easy operation and energy saving purpose. After reference to the advantages of the existed models at home and abroad, also repeated improvement, the new honeycomb girder gantry crane owns the following advantages:
A, The first and unique honeycomb girder made by ZZHZ owns the characteristics of light self-weight, big loading capacity, strong wind-resistance and so on.
B, The mature pin connection method is not only solid and reliability, in particular facilitate to assemble and disassemble. (Push a steel pin only needs a few minutes).
C, The support leg of honeycomb girder gantry crane is pipe type, it can be divided into pieces while transferring the sites and it’s very convenient to transport.
D, The minimum power-supply capacity solves the shortage of energy.
E, The traveling mechanism adopts the inverter with the adjustable multi-stage speed, high precision alignment and small impact to the whole machine.
