Author(s): Chris Oxlade
The world's largest structures are revealed in this book on skyscrapers and towers. One of a series, it describes when the first skyscraper was built, how a skyscraper stays up and why skyscrapers are different in an earthquake zone. It illustrates the structures under ground as well as the steel frame of vertical columns and horizontal beams. Concrete frames are constructed around a central core but cannot reach the heights of steel frame structures.