A steel structure is a construction framework made primarily from steel components, which are known for their strength and durability. These structures are commonly used in buildings, bridges, and other infrastructure due to their ability to support heavy loads and resist environmental factors. Steel's flexibility allows for innovative architectural designs, making it a popular choice in modern construction. The use of steel in construction dates back to the late 19th century, with notable examples like the Eiffel Tower and Brooklyn Bridge. Steel structures are often prefabricated, meaning they are manufactured off-site and assembled on location, which can speed up the construction process and reduce costs.