This material has a long history. Historically, this material was (and still is) very famous for weapon building and instruments manufacturing. When corrosion of block structures compelled architects to rethink the structural components in the 18th century, iron was introduced into the mainstream construction process. However, iron could not impress engineers as it was not strong enough. It was then, when commercial steel was made available in market for construction purposes.
Today, the main use of this material is in construction. Construction of mega projects, bridges, stadiums, huge shopping malls and other international standard complexes are impossible without steel. Steel buildings are seen across the world. There are basically two types of structures developed using this material. One has just its internal frame made up of steel with the external body made up of another material, usually blocks, PVC, wood, glass or a combination of these. While another type of metal structure is the one, which is entirely made up of steel. Both entire metal structures and steel frame buildings are completely made up of metal, primarily steel.
Modern metal buildings that are entirely built up of steel emerged in 1940s. These structures have internal web like structure made up of metal and external steel sheet that is made up of high grade galvanized steel. This steel is passed through special processes to ensure it is highly resistant against rust, corrosion, and other harsh weather impacts. As days pass by, this material is improving and so are the fine metal structures becoming finer.