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The Willis Tower, originally and still commonly referred to as the Sears Tower, is a 110-story, 1,451-foot (442.3 m) skyscraper in the Loop community area of Chicago in Illinois, United States. Designed by architect Bruce Graham and engineer Fazlur Rahman Khan of Skidmore, Owings & Merrill (SOM), it opened in 1973 as the world's tallest ...
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[2] [3] Sears Tower was the tallest building in the world upon its completion, and remained the tallest building in the United States until May 10, 2013. [4] The second, third, and fourth-tallest buildings in Chicago are the Trump International Hotel & Tower, St Regis Chicago, and the Aon Center, respectively. Of the ten tallest buildings in ...
At the time, the Willis Tower held first place in the second and third categories, the Petronas Towers held the first category, and the original WTC North Tower held the fourth (height to tip) category with its antenna. [19] In 2000, however, a new antenna mast was placed on the Willis Tower, giving it the record in the fourth category.
In 2002, the eastern antenna tower was extended to a height of 378 feet (115 metres) in order to enable WBBM-TV to add new digital antenna equipment at a height greater than the roof height of the Sears Tower (Willis Tower). Subsequently, the western antenna tower was reduced to a height of 285 feet (87 metres). [70] For a long time, the ...
Counting the Petronas Towers' antenna spires yet discounting the Sears Tower's antennae, the former rose 10 meters above the latter, standing at a height of 452 m (1,483 ft) and each having 88 floors. In 2004, the construction of Taipei 101 brought the height of skyscrapers to a new level, standing at 508 m (1,667 ft) with 101 floors.
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Formerly known, and still commonly referred to, as the Sears Tower. It was the tallest building in the world from 1974 until 1998. It is the third-tallest building in the Western Hemisphere and the 26th-tallest building in the world. [7] [8] 4 111 West 57th Street: New York City: United States 435 (1,428) 84 2021 Also known as Steinway Tower.