Steel structure engineering is a steel-based structure and is one of the main types of building structures. Steel structure is one of the more common structural forms in modern construction engineering. China was the first country to use iron to build a load-bearing structure. In the Qin Shihuang era (246-219 BC), iron was used as a simple load-bearing structure, and Western countries began to use metal load-bearing structures in the 17th century. In the 3rd-6th centuries, the Chinese people who were smart and hardworking used iron chains to build iron suspension bridges. The famous Sichuan Duding River Bridge, the Yuanjiang Bridge in Yunnan and the Panjiang Bridge in Guizhou were examples of China’s early iron-bearing structures. .
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