Sheer Amazing Facts about the Sears Tower
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- At first, the Sears Tower was going to be two twin towers occupying the site at half the height of the current tower.
- The building has been climbed up twice, by Dan Goodwin in 1981 and by Alain Robert in 1999.
- The Sears Tower contains enough concrete to build an eight-lane, five-mile-long highway, enough steel to build 50,000 automobiles, and enough telephone wiring to wrap around the world 1.75 times.
- Sears is no longer headquartered in this building, having sold the building and moved out to Hoffman Estates, Illinois in 1992.
- On a clear day, you can see four states -- Illinois, Indiana, Wisconsin, and Michigan -- from the Sears Tower Visitor Skydeck.
- The building leans about 4 inches (10 cm) from vertical due to its slightly asymmetrical design, placing unequal loads on its foundation. This can occasionally be felt.
- The antennas atop the Sears Tower are struck by lightning an average of 650-675 times per year.
- The restrooms on the 103rd floor sky deck 1,353 feet (412 m) above street level are the highest in the world
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6 comments:
Dude great stuff..........it's really interesting ........
That is very interesting, I imagine a lot of planning went into designing this building. I've heard that a lot of new skyscrapers are being built with a large metal sphere suspended near the top of the building to keep it balanced in high winds. Does the Sears Tower use one of these, or does it have some other system working to keep it stable? That would be something interesting to know. Neat facts!
Depending on the size of the building, there could be an array of possibly hundreds of dampers. Each damper would sit on the floor and be attached to the chevron braces that are welded into a steel cross beam. As the building begins to shake, the dampers would move back and forth to compensate for the vibration of the shock. When it's magnetized, the MR fluid increases the amount of force that the dampers can exert.
To provide stability against high winds, architect Bruce Graham used a new form of tubular construction for Sears Tower..ie the bundled tube system as discussed in the post
http://www.suberic.net/~avon/mxphysics/walter%20and%20hunter/Image60.gif
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Hey this is great!! The information is brief and interesting for the reader to read..keep it up!
Hope to see more..
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