USA HISTORY

Detailed explanation-1: -As steel is stronger and lighter in weight than iron, the use of a steel frame made possible the construction of truly tall buildings.

Detailed explanation-2: -Stainless steel plate, coil and strip is used in abundance when constructing a high-rise building, and is used to create lintels, welded to form shelf angles, windposts, masonry supports, wall starters and much more.

Detailed explanation-3: -One common feature of skyscrapers is a steel framework from which curtain walls are suspended, rather than load-bearing walls of conventional construction. Most skyscrapers have a steel frame that enables them to be built taller than typical load-bearing walls of reinforced concrete.

Detailed explanation-4: -Once the elevator had been optimized for popular use, it only contributed to the growth of taller and taller skyscrapers. The 1930 skyscraper study emphasizes that elevator technology was very expensive to install and maintain at that early stage of the skyscraper.