The steel truss bridge is a structural system between beams and arches. It is a structure in which a bent upper beam structure and a pressure-bearing lower column are integrated together. Due to the rigid connection between the beam and the column, the beam is unloaded due to the flexural rigidity of the column. The entire system is a compression-bending structure as well as a thrust structure.

According to the different position of the bridge floor, it is divided into upper bearing steel truss bridge that the bridge floor is located in the upper part of the main truss and lower bearing steel truss bridge which the bridge floor is located in the lower part of the main truss.

Triangular truss structure is simple, the design is fixed, easy to install and manufacture.

Many bar specifications. Many specifications and large internal force of the vertical rod. All are large nodes.

The shear force of the same node is borne by two diagonal rods, which are small and short in section. For large spans, the rods are short, light and suitable for mounting and dismounting Bridges.

Used for large span, short compression inclined rod, which is favorable for buckling stability. The small section of the inclined rod makes the number of connecting pins on the joint plate less, and it is easy to arrange the joint.

Truss bridges have been widely used throughout history and continue to be used in modern bridge construction. They provide efficient and cost-effective solutions for spanning large distances. Truss bridges are often prefabricated in sections and then assembled on-site, allowing for faster construction and reduced disruption to traffic.

Common uses include:

• Road and highway bridges spanning rivers, valleys, or other obstacles
• Railway infrastructure capable of withstanding heavy loads and dynamic forces