The Sears Tower is really a collection of nine tubes and is regarded as one of the most efficient wind-resistant buildings. This is an excellent skyscraper design for Chicago, the "Windy City," where the average wind speed is 16 miles per hour. The building uses wind energy to help drive air conditioners that supply heat to offices during cold weather.
There are actually two sets of three tubes each, with the middle tube being connected by arms at both ends. These tubes are hollow and act as wind turbines when wind blows through them. They turn a small generator which in turn supplies power to lights and other appliances within the tower.
Each tube has large curved fins on the outside surface which work like air brakes to prevent further upward movement of the structure. The more than 100 stories (91 m) high building is also designed to be strong enough to withstand major storms. In 1998, it was estimated that the tower required replacement of its roof every seven years on average. The lifespan of this type of construction is generally considered to be around 20 years.
The Sears Tower was built between 1989 and 1994. It stands at 1,453 feet (442 meters) and contains 8 million square feet (738,000 square meters). Of this, office space makes up 47 percent and apartments or condominiums serve 45 percent. Storage space amounts to 3 percent and hotel rooms 2 percent.
On a clear day, the Sears Tower Visitor Skydeck offers views of four states: Illinois, Indiana, Wisconsin, and Michigan. The greatest wind drift is one foot at the very top of the structure. Six robotic window-washing equipment positioned on the Sears Tower's roof clean all 16,100 windows. They work from mid-May to mid-October each year.
The building has 1,100 windows and weighs 150 tons (136 tonnes). It is also known as the John Hancock Center or Chicago's new tallest skyscraper when it was completed in 1990. The height of the Sears Tower is 576 feet (175 m), making it the second-highest building in Chicago after the Willis Tower (formerly known as the John Hancock Building).
It is located at 600 North Lake Street in the city's downtown area. The tower replaces the Merchandise Mart as Chicago's premier office building and is still under construction when it opens its doors for business in April 1992. The opening ceremony is attended by President Bush and Queen Elizabeth II is expected to visit the building later in 1992.
The Sears Tower is not owned by Sears Roebuck but by an independent company that manages its rental income. The building is named for its former tenant, the Sears department store chain. When it opened, the Sears Tower was the highest building in the world.
Many people are curious about the rationale for the construction of the Sears Tower, which began in 1970 and continued until 1973. It is considered one of the highest structures in the world. It has 108 stories and is located at 233 South Wacker Drive in Chicago, Illinois. The tower was designed by architect Helmut Jahn and constructed by the architectural firm of Johnson, Lundberg & Johnson.
The Sears Tower is the main structure of the Chicago World's Fair of 1974. Its construction was part of an effort by Richard Sears to promote his company's store chain, which had recently been acquired by him after being founded in 1913 by his father, Alvah. The tower was also meant to attract more customers to Sears' stores, which were known for their low prices. However, only nine years after it was completed, the financial crisis of 1983 caused several large retailers to file for bankruptcy, including Sears. The company closed all its towers except this one, which became a symbol of its survival. Today, the Sears Tower is the second-highest building in America (after the Trump International Hotel & Tower) and the tallest brick building in the Western Hemisphere.
You might also want to know that the original plan for the tower was not approved by any government body such as the City Council or the Board of Trade.
Sears Tower Willis Tower (previously known as the Sears Tower) is a 110-story structure in the center of downtown Chicago. It is the third-highest building in the city and the 11th-highest in the United States. The tower was named after its primary sponsor, retailer and department store chain Sears, which had its headquarters in Chicago. When it was under construction in 1969, it was intended to be the world's first fully computer-controlled building; however, this technology wasn't available at the time so it was built with conventional systems instead.
The tower has been called many things over the years including: The World's First Fully Computer-Controlled Building (1969); America's Tallest Free-Standing Structure (1973); The Tallest Man-Made Object Within U.S. Borders (1974); and, simply, The Sears Tower. (2005)
It was also once considered for use by the United States military as an observation post during times of war. This idea arose due to concerns that Chicago might be targeted for attack by nuclear weapons. However, this plan was dropped when scientists calculated that the tower would not be able to withstand even a small nuclear blast.
Sears Tower is a contemporary and appealing office building with a floor space of 418.64 square meters, of which 353 961 m2 is rentable. The surface is divided into 110 units, 108 of which are above ground and accessible through 104 elevators, 16 of which are double height. It was the world's first skyscraper to utilize this style of lift. The remaining two lifts serve lower floors.
In terms of design, the tower is inspired by the silos found along the Mississippi River in Illinois and Missouri. It was also meant to resemble a stack of books with the number 2 in between each section of the building. The tower was built in 1973 by the Chicago-based architectural firm of Skidmore, Owings & Merrill (SOM), famous for designing New York's John F. Kennedy International Airport and Shanghai Pudong International Airport among other landmarks. The project was sponsored by the real estate development company that would become known as Sears, Roebuck and Company.
When it was completed, the Sears Tower was the tallest free-standing structure in the world for three years until the Burj Khalifa was completed. It remains today as one of the top 10 tallest buildings in the world. The tower has 24 stories but only the first six are habitable while the rest are storage rooms or parking levels. There are also two special rooms on the 63rd floor that serve as observatories. One can take in view of both downtown Chicago and the city of Milwaukee along with some of Wisconsin's southernmost borders.