During the first 20th century a lot of business/home owners are requiring more, and more about structural glass cost and installation. NYC has a large variety of structural glass that's currently used for storefronts, glass walls or glass floors. Because of popularization and modern building architecture a lots of real state investors follows the new glass designs for their new projects. This new 21 century style gives to the building a great look and an amassing view for interiors. At the same time, closer analysis reveals major differences in the two designs that illuminates significantly the interiors of the buildings.