Product Description

   The basic components of a bridge 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. Huilai can provide customers with design analysis, drawing splitting, steel production, welding and forming work, etc.

Steel Structure


Steel structure is a structure composed of steel materials and is one of the main building structure types.

The structure is mainly composed of steel beams, steel columns, steel trusses and other components made of section steel and steel plate. welding, bolts or rivets are usually used between each component or component.

Because of its light weight and simple construction, it is widely used in industrial plants, municipal infrastructure construction, electric power, Bridges, offshore oil engineering, aerospace and other industries. Including bridge structure, plant roof beam column structure, bridge steel box girder(Steel Module), deck longitudinal beam, coal mine structure tower and so on.

In order to solve the rust prevention on the surface of steel structure, we can also provide shot blasting and painting treatment on the surface of steel structure, including epoxy paint, galvanizing and other processes to extend the service life of steel structure and improve the service performance.

The main inspection methods of welding are: magnetic particle inspection(MT), penetration  inspection(PT), UT testing , RT testing, etc.