A steel bridge is a type of bridge with a span structure constructed of steel. In 1874, the United States built the world's first large steel bridge on the Mississippi River - St. Louis Steel Arch Bridge. After World War II, steel bridge science and technology made great progress in the smelting of high-strength and high-quality steel, the improvement of welding technology, the application of orthotropic steel bridge decks and high-strength bolts, and the diversification of structural types, which promoted the widespread adoption of large-span steel bridges. Due to the high strength and superior performance of steel, as well as the small ratio of apparent density to allowable stress, the crossing capacity of steel bridges is relatively large.

The manufacturing of steel bridge components is most suitable for industrialization, with convenient transportation and installation, short installation period, and easy repair and replacement after damage. However, steel is prone to corrosion and difficult maintenance. The orthotropic steel bridge deck composed of longitudinal ribs, crossbeams, and cover plates welded together has been widely used in modern highway steel bridges with large and medium spans both domestically and internationally due to its advantages of lightweight, high strength, and fast construction. However, due to directly bearing the local effects of vehicles, the stress influence line is short, and the passing of vehicles can cause several stress cycles. In addition, the stress concentration of welding nodes and inevitable welding defects make steel bridge decks prone to fatigue cracking.

Our steel bridges include the CB200 Steel Bridge and the ZB321 Steel Bridge. Feel free to learn more.