Causes of cracks in semi-trailer beams

The trailer girder is the main component of the trailer. There are many longitudinal sub-beams around the girder. The girder and sub-beams form the entire cargo shipping platform of the trailer. In addition: if the trailer beams are manufactured and selected improperly, broken beams and other road traffic accidents may occur.

    There are many reasons for the cracking of trailer beams. The main reasons are unqualified materials, and there are false welds and slag inclusions when welding the beams.

    The trailer girder is the main component of the trailer frame. In the middle of the frame, it is usually called the longitudinal beam. It is divided into left longitudinal beam and right longitudinal beam. The cross-section is usually I-shaped and consists of upper/lower wings and a middle web. , the suspension bracket is welded to the lower wing plate of the longitudinal beam. The front gooseneck adopts a variable diameter structure, and the traction plate is welded to the lower wing plate of the front gooseneck. Squatting next to the trailer, I saw two large I-shaped cross-sections that were the girders.