Willis Tower

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Willis Tower,

formerly the

Sears Tower,

Chicago, the second tallest building in the United States. Until the completion of the 1,483-ft (452-m) Petronas TowersPetronas Towers,
twin skyscrapers in Kuala Lumpur, Malaysia, that are the world's tallest twin towers. Standing 1,483 ft (452 m) high, they were designed by the Argentinian-American architect César Pelli.
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 (1998) in Kuala Lumpur, Malaysia, it was the world's tallest building. Constructed from 1970 to 1974 for Sears, Roebuck & Co., it rises to a height of 1,451 ft (442 m) and has 108 floors as well as a 278-ft (85-m) television antenna. Designed by the firm of Skidmore, Owings and Merrill, the building is supported structurally by square tubes of welded steel with floors suspended within the tubes, a technological innovation that was developed specifically for the mammoth skyscraperskyscraper,
modern building of great height, constructed on a steel skeleton. The form originated in the United States. Development of the Form

Many mechanical and structural developments in the last quarter of the 19th cent. contributed to its evolution.
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 by architectural engineer Fazlur Kahn. The tower has an exterior of black aluminum and bronze-toned glass cut by black bands. It was renamed in 2009.
References in periodicals archive ?
NexGen's Willis Tower services will offer unmatched speed and reliability that is crucial for businesses competing in a fast-paced global economy.
The Willis Tower was the tallest building in the world for 25 years.
Chicago's Willis Tower, formerly known as the Sears Tower, has officially been surpassed as the tallest building in the USA by the 1 World Trade Center in New York, right - which is also now the tallest building in the western hemisphere
A distributed antenna system (DAS) installed by ExteNet at Willis Tower handles advanced wireless technologies such as UMTS and LTE in common areas and offices throughout the building, as well as on the parking garage levels.
uk, only flights from The waterfall, Buckingham Fountain and modelled after one at Versailles, is surrounded by gardens and has a wonderful backdrop of the Willis Tower.
Jacqui braves the Willis Tower The river with the Willis Tower in the background The Bean sculpture by Anish Kapoor in Millennium Park Be blown away.
Recently completed and opened for visitors in 2010, The Ledge at Chicago's Willis Tower (formerly Sears Tower) is the newest attraction to the Skydeck on the 103rd floor.
Merchandise Mart Plaza and the Willis Tower at 333 S.
Then it takes you to a horse wearing a cowboy hat (presumably Texas), a barn, baseball, Willis Tower (formerly the "Sears Tower"), an orange, and a bald eagle, before finally reaching the Statue of Liberty and the Atlantic Ocean in the far right.
and the Willis Tower in Chicago Office buildings in strong U.
Chicago's Willis Tower, formerly known as the Sears Tower, has replaced nearly 20 square feet of glass on the south side of its 56th floor with transparent solar windows as part of a pilot project.
Robert, 48, has scaled more than 70 skyscrapers, including New York's Empire State Building and Chicago's Willis Tower in the United States, and the Petronas Towers in Kuala Lumpur, Malaysia.