![]() Steel frame construction acts like a skeleton upon which the lighter weight building skin is attached. Steel frame construction allowed buildings of great height without the use of loadbearing walls, since this would have required thick walls at the base that would have rendered the lower stories useless. ![]() The modern high-rise rose to prominence when two significant developments were achieved: steel frame construction and the safety elevator. The purpose of the modern high-rise building is to maximize building area in the smallest lot area. Although these were tall structures, they did not perform the same functions that today’s modern high-rise does. ![]() The Towers of Bologna, constructed in the 12 th Century AD, topped out at about 320 feet for the tallest tower. The Great Pyramid of Giza, built in the 26 th Century BC, was as high as 480 feet high. Tall structures have been in existence for centuries.
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