The largest crane

The QAY 1200 all terrain crane of Xugong Group is the largest wheeled crane in the world at present, and the cost of each crane exceeds12 million yuan.

2. The world's largest boom crane-7500 tons? Bigger? AFRD？ 125?

、、

Generally, cranes only use four driving wheels and four driven wheels. If the lifting weight is heavy, wheel pressure is usually reduced by adding more wheels. When there are more than four wheels, the articulated balance frame device must be adopted to make the load of the crane evenly distributed on each wheel. ? The metal structure of a bridge is composed of a main beam and an end beam, which can be divided into a single beam bridge and a double beam bridge. A single beam bridge consists of a single beam and end beams on both sides of the span, and a double beam bridge consists of two main beams and end beams. ? The main beam is rigidly connected with the end beam, and wheels are installed at both ends of the end beam to support the bridge to run on the viaduct. Rails are welded on the main girder for crane operation. There are many typical structural types of bridges, such as box structure, four-truss structure and vierendeel truss structure.