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Wednesday, March 24, 2010
The world's tallest office building is the Sears Tower, in Chicago, Illinois. Its highest roof level rises 1,453 feet above the ground.
The Sears Tower stands on Wacker Drive in Chicago's central business district. Here land is so expensive that people build offices upward rather than outward.
The tower is an office block that looks like nine upended narrow glass boxes, some longer than others, joined at the sides. Steel frames inside support the walls, which are made of aluminum and dark glass. The building has 110 floors, 16,000 windows; 103 elevators; 18 escalators. More than 16,500 people work in it.
The Sears Tower is named after a mail-order firm which was originally called Sears, Rosebuck and Company. The tower was built between 1970 and 1973. Some television masts and towers are even taller than the Sears Tower.
The Sears Tower stands on Wacker Drive in Chicago's central business district. Here land is so expensive that people build offices upward rather than outward.
The tower is an office block that looks like nine upended narrow glass boxes, some longer than others, joined at the sides. Steel frames inside support the walls, which are made of aluminum and dark glass. The building has 110 floors, 16,000 windows; 103 elevators; 18 escalators. More than 16,500 people work in it.
The Sears Tower is named after a mail-order firm which was originally called Sears, Rosebuck and Company. The tower was built between 1970 and 1973. Some television masts and towers are even taller than the Sears Tower.
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