Sears Tower - the skyscraper, located in the city of Chicago, USA. The height of a skyscraper is 443.2 meters, floors - 110. The beginning of construction in August 1970, ending - May 4, 1973. Chief architect Bruce Graham, chief designer (project engineer) Fazlur Khan.
The facility consists of 9 square pipes that form the basis for building a large box. He is standing on concrete piles with a stone embankment, wedge in the underlying rocks beneath it. At 50 floors up 9 welded steel pipes. Then the building begins to narrow. Another seven pipes go up to 66 - first floor, and raised five to 90 - first floor, and only two pipes form the remaining 20 floors. On the roof has two television antennas.
Area buildings - more than 418000 m ², which equals 57 football fields. In the 104 high-speed elevator skyscraper, which share a building at 3 zone and help people navigate it. Refractory remain covered with a black aluminum panels with more than 16000 windows of dark glass. Six automatic washing machines to clean all the windows of the building 8 times a year.
Petronas Twin Towers in Kuala Lumpur at a height of 452 meters, including decorative spire, had been declared the tallest building in the world after completion of their construction in 1998. Not everyone agreed with this. There are two categories for determining the highest buildings. Petronas Twin Towers were considered among the highest in one of the categories. After graduating from Taipei 101 building in Taipei, Petronas Twin Towers yielded championship in height with spire, and the Sears Tower lost the championship at a height of the roof. But the height of the antenna Sears Tower is currently surpasses spire height of Taipei 101.
Sears Tower is the tallest building in the U.S. and holds the world record in altitude from the ground and to the top of the antenna.