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 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 , measured from the east entrance.
In February 1982, two television antennas were added to the structure, increasing its total height to . The western antenna was later extended to on June 5, 2000 to improve reception of local NBC station WMAQ-TV.
Black bands appear on the tower around the 29th–32nd, 64th–65th, 88th–89th, and 104th–109th 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.
On August 12, 2007, the Burj Dubai in Dubai, United Arab Emirates was reported by its developers to have surpassed the Sears Tower in all height categories.
In 1969, Sears, Roebuck & Co. was the largest retailer in the world, with about 350,000 employees. Sears executives decided to consolidate the thousands of employees in offices distributed throughout the Chicago area into one building on the western edge of Chicago's Loop. With immediate space demands of 3 million square feet (279,000 m²), and with predictions and plans for future growth necessitating even more space than that, architects for Skidmore knew that the building would be one of the largest office buildings in the world.
Sears executives decided early on that the space they would immediately occupy should be efficiently designed to house the small army that was their Merchandise Group. However, floor space for future growth would be rented out to smaller firms and businesses until Sears could retake it. Therefore, the floor sizes would need to be smaller, and to have a higher window-space to floor-space ratio, to be more attractive and marketable to these prospective lessees. Smaller floor sizes necessitated a taller structure. Skidmore architects proposed a tower which would have large 55,000-square-foot (5,000 m²) floors in the lower part of the building, and would gradually taper the area of the floors down in a series of setbacks, which would give the Sears Tower its distinctive, husky-shouldered look.
As Sears continued to offer optimistic projections for future growth, the tower's proposed height soared into the low hundreds of floors and surpassed the height of New York's unfinished World Trade Center to become the world's tallest building. Restricted in height not by physical limitation or imagination but rather by a limit imposed by the Federal Aviation Administration to protect air traffic, the Sears Tower would be financed completely out of Sears' deep pockets, and topped with two antennas to permit local television and radio broadcasts. Sears and the City of Chicago approved the design, and the first steel was put in place in April 1971. The structure was completed in May 1973. Construction costs totaled approximately $150 million USD at the time, which would be equivalent to roughly $950 million USD in 2005. For comparison, Taipei's Taipei 101, built in 2004, cost around the equivalent of US$1.64 billion in 2005 dollars.
Sears Tower has gone through several owners in the years since but Sears has retained the naming rights for the building. It is now a multi-tenant office building with more than 100 different companies in residence, including major law firms, insurance companies and financial services firms.
A second Skydeck on the 99th floor is used when the 103rd floor is closed.
The tourist entrance can be found on the south side of the building along Jackson Boulevard.
Without warning, in August 1999 French urban climber Alain "Spiderman" Robert, using only his bare hands and feet scaled the building's exterior glass and steel wall all the way to the top. A thick fog settled in near the end of his climb, making the last 20 floors of the building's glass and steel slippery.
At 1,482.6 feet (451.9 m) tall, including decorative spires, the Petronas Twin Towers in Kuala Lumpur, Malaysia, laid claim to replacing the Sears Tower as the tallest building in the world in 1998. Not everyone agreed, and in the ensuing controversy four different categories of "tallest building" were created. Of these, Petronas was the tallest in one category (height to top of architectural elements, meaning spires but not antennas). However, before the addition of the Sears Tower's own two antennas in 1982, One World Trade Center was taller by height to top of its 360-foot (110 m) antenna (added in 1978 to its previous 1368-foot (417 m) height).
Taipei 101 in Taiwan claimed the record in three of the four categories in 2004 to become generally recognized as the tallest building in the world. Taipei 101 surpassed the Petronas Twin Towers in spire height and the Sears Tower in roof height; it also claimed the record for highest occupied floor. The Sears Tower retained one record: its antenna exceeded the Taipei 101's spire in height.
The Sears Tower remains the tallest office building in North America, and retains the world record when measuring from sidewalk level of the main entrance to the top of the antenna. It is however the second tallest free standing structure or tower in North America measuring 85 feet shorter than Toronto's CN Tower. When completed, the Freedom Tower in New York City is expected to surpass the Sears Tower through its structural but not occupied peak. Burj Dubai, currently under construction in Dubai, is expected to claim all height records, surpassing the Sears Tower, Taipei 101 and the CN Tower, when it opens in 2009. The Chicago Spire now under construction is expected to lay claim to most height records for North American structures the following year.
The tower is seen in the PC game Command and Conquer: Red Alert 2 and the Rampage series of video games. The tower is also featured in SimCity PC games, as well as Namco's Ace Combat 5 The Unsung War, and has most recently been in the newest Batman movie, The Dark Knight, where Batman stands on top of the NEDM in one scene.
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 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 , measured from the east entrance.
In February 1982, two television antennas were added to the structure, increasing its total height to . The western antenna was later extended to on June 5, 2000 to improve reception of local NBC station WMAQ-TV.
Black bands appear on the tower around the 29th–32nd, 64th–65th, 88th–89th, and 104th–109th 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.
On August 12, 2007, the Burj Dubai in Dubai, United Arab Emirates was reported by its developers to have surpassed the Sears Tower in all height categories.
In 1969, Sears, Roebuck & Co. was the largest retailer in the world, with about 350,000 employees. Sears executives decided to consolidate the thousands of employees in offices distributed throughout the Chicago area into one building on the western edge of Chicago's Loop. With immediate space demands of 3 million square feet (279,000 m²), and with predictions and plans for future growth necessitating even more space than that, architects for Skidmore knew that the building would be one of the largest office buildings in the world.
Sears executives decided early on that the space they would immediately occupy should be efficiently designed to house the small army that was their Merchandise Group. However, floor space for future growth would be rented out to smaller firms and businesses until Sears could retake it. Therefore, the floor sizes would need to be smaller, and to have a higher window-space to floor-space ratio, to be more attractive and marketable to these prospective lessees. Smaller floor sizes necessitated a taller structure. Skidmore architects proposed a tower which would have large 55,000-square-foot (5,000 m²) floors in the lower part of the building, and would gradually taper the area of the floors down in a series of setbacks, which would give the Sears Tower its distinctive, husky-shouldered look.
As Sears continued to offer optimistic projections for future growth, the tower's proposed height soared into the low hundreds of floors and surpassed the height of New York's unfinished World Trade Center to become the world's tallest building. Restricted in height not by physical limitation or imagination but rather by a limit imposed by the Federal Aviation Administration to protect air traffic, the Sears Tower would be financed completely out of Sears' deep pockets, and topped with two antennas to permit local television and radio broadcasts. Sears and the City of Chicago approved the design, and the first steel was put in place in April 1971. The structure was completed in May 1973. Construction costs totaled approximately $150 million USD at the time, which would be equivalent to roughly $950 million USD in 2005. For comparison, Taipei's Taipei 101, built in 2004, cost around the equivalent of US$1.64 billion in 2005 dollars.
Sears Tower has gone through several owners in the years since but Sears has retained the naming rights for the building. It is now a multi-tenant office building with more than 100 different companies in residence, including major law firms, insurance companies and financial services firms.
A second Skydeck on the 99th floor is used when the 103rd floor is closed.
The tourist entrance can be found on the south side of the building along Jackson Boulevard.
Without warning, in August 1999 French urban climber Alain "Spiderman" Robert, using only his bare hands and feet scaled the building's exterior glass and steel wall all the way to the top. A thick fog settled in near the end of his climb, making the last 20 floors of the building's glass and steel slippery.
At 1,482.6 feet (451.9 m) tall, including decorative spires, the Petronas Twin Towers in Kuala Lumpur, Malaysia, laid claim to replacing the Sears Tower as the tallest building in the world in 1998. Not everyone agreed, and in the ensuing controversy four different categories of "tallest building" were created. Of these, Petronas was the tallest in one category (height to top of architectural elements, meaning spires but not antennas). However, before the addition of the Sears Tower's own two antennas in 1982, One World Trade Center was taller by height to top of its 360-foot (110 m) antenna (added in 1978 to its previous 1368-foot (417 m) height).
Taipei 101 in Taiwan claimed the record in three of the four categories in 2004 to become generally recognized as the tallest building in the world. Taipei 101 surpassed the Petronas Twin Towers in spire height and the Sears Tower in roof height; it also claimed the record for highest occupied floor. The Sears Tower retained one record: its antenna exceeded the Taipei 101's spire in height.
The Sears Tower remains the tallest office building in North America, and retains the world record when measuring from sidewalk level of the main entrance to the top of the antenna. It is however the second tallest free standing structure or tower in North America measuring 85 feet shorter than Toronto's CN Tower. When completed, the Freedom Tower in New York City is expected to surpass the Sears Tower through its structural but not occupied peak. Burj Dubai, currently under construction in Dubai, is expected to claim all height records, surpassing the Sears Tower, Taipei 101 and the CN Tower, when it opens in 2009. The Chicago Spire now under construction is expected to lay claim to most height records for North American structures the following year.
The tower is seen in the PC game Command and Conquer: Red Alert 2 and the Rampage series of video games. The tower is also featured in SimCity PC games, as well as Namco's Ace Combat 5 The Unsung War, and has most recently been in the newest Batman movie, The Dark Knight, where Batman stands on top of the NEDM in one scene.
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