Steel bridges are structures made primarily from steel, a strong and durable material. They are designed to support the weight of vehicles and pedestrians while spanning gaps like rivers or valleys. Steel bridges can be built in various styles, including beam, arch, and suspension designs, each serving different purposes and aesthetic preferences. These bridges are favored for their longevity and resistance to harsh weather conditions. They require less maintenance compared to other materials, such as wood or concrete. Additionally, steel bridges can be prefabricated, allowing for quicker construction and reduced costs, making them a popular choice for infrastructure projects.