A metal structure refers to a construction made primarily from metal materials, such as steel, aluminum, or iron. These structures are commonly used in buildings, bridges, and other infrastructure due to their strength, durability, and ability to withstand various environmental conditions. Metal structures can be prefabricated or built on-site, allowing for flexibility in design and construction. The design of metal structures often involves the use of frameworks, beams, and columns to support loads. Engineers consider factors like weight, stress, and environmental impact when creating these structures. Common applications include skyscrapers, industrial facilities, and transportation systems.