The Empire State Building: An Innovative Skyscraper | Buildings
https://www.buildings.com/industry-news/article/10193728/the-empire-state-building-an-innovative-skyscraper
WebJun 28, 2006 · With 57,000 tons of steel columns and beams, 62,000 cubic yards of concrete, 6,400 windows, and 67 elevators in 7 miles of shafts, the Empire State Building is a feat of 20th-century engineering. 10 Little Known Facts About the Empire State Building from our sister publication interior + sources.
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