The basic components of a Bridge Constructure Structure include the upper structure, lower structure, support system, and ancillary facilities. The substructure refers to the part of a bridge located below the support, also known as the supporting structure, which includes piers, abutments, and the foundation of piers. The adjacent two span bridge is located in the middle of the bridge, and the basic concept of the box girder structure is that all upper structures become integral hollow beams. When the main load passes through any position on the bridge, all parts of the hollow beam (ribs, top plate, and bottom plate) participate in the force as a whole. The lower structure is usually made of steel plates, steel pipes, angle steels, H-beams, and other parts, which are welded together through components and ultimately connected on-site by welding or bolts. Xinyue can provide customers with design analysis, drawing splitting, steel production, welding and forming work, etc.