Steel is one of the important metal used in constructions and to create some extra ordinary and modern structures. There are many steel structures around the world with critical design. We listed popular 3 steel structures and how it was built which will make you awe struck. Burj Khalifa Burj Khalifa, 820 meters to the topmost floor and 10 additional meters to the tip, is the world’s tallest skyscraper. This…