Low-bed semi-trailers are usually used to transport heavy-duty vehicles (such as tractors, buses, special vehicles, etc.), rail vehicles, mining machinery, forestry machinery, construction machinery (such as excavators, bulldozers, loaders, pavers, cranes, etc.) ) and other heavy-duty goods, the lower the center of gravity, the better the stability and safety, and the stronger the ability to transport over-height goods and pass overhead obstacles.

Low-bed semi-trailers usually use a concave beam (or well-type) frame, with the front section of the frame being a gooseneck (the traction pin in the front section of the gooseneck is connected to the traction saddle on the tractor, and the rear end of the gooseneck is connected to the semitrailer frame connected), the middle section is the cargo platform (the lowest part of the frame), and the rear end is the wheel frame (including wheels).

1.low plate semi-trailer has flat plate, concave beam and tire exposed structure, its frame is stepped, longitudinal beam section is I-shaped, with high stiffness, high strength characteristics.

2. the main plane of the frame cargo platform is low, ensuring the smoothness of transportation, and carrying all kinds of construction machinery, large equipment and steel.