What exactly is the Sears tower?

Answer 1

The Sears Tower is a skyscraper in Chicago, Illinois, and the tallest building in North America, by the measurement from the ground to its roof. By the measurement to the top of the antenna/spire, the World Trade Center passed it by 1.9 feet (1,731.9 feet). Commissioned by Sears, Roebuck and Company, it was designed by chief architect Bruce Graham and structural engineer Fazlur Khan of Skidmore, Owings, & Merrill.

Construction commenced in August 1970 and the building reached its originally anticipated maximum height on May 3, 1973. When completed, the Sears Tower had overtaken the roof of the World Trade Center in New York City as the world's tallest building. The tower has 108 stories as counted by standard methods, though the building owners count the main roof as 109 and the mechanical penthouse roof as 110. The distance to the roof is 1,450 feet, 7 inches (442 m), measured from the east entrance.

In February 1982, two television antennas were added to the structure, increasing its total height to 1,707 feet (520 m). The western antenna was later extended to 1,729 feet (527 m) on June 5, 2000 to improve reception of local NBC station WMAQ-TV.

Two-story high black bands appear on the tower around the 30th–32nd, 64th–65th, 88th–89th, and 106th–107th floors. These are louvers which allow ventilation for service equipment and obscure the structure's belt trusses which Sears Roebuck did not want to be visible as on the John Hancock Center.

The building's official address is 233 South Wacker Drive, Chicago, Illinois 60606.



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Answer 2

A building.

Answer 3

a scyscraper located in chicago IL

Answer 4

http://en.wikipedia.org/wiki/Sears_Tower