who designed the sears tower?
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The Sears Tower, completed May 3, 1973, rises to a height of 1,450 feet and is one of the most recognizable landmarks in the Chicago skyline and in the world. The Sears tower held the record for the world’s tallest building for 25 years until the Petronas Towers in Kuala Lampur, Malaysia were built in 1998. Then in the Fall of 2004 Taipei 101 took all but one title -- tallest to the tips of the antennas, which the Sears Tower still owns. Including the Sears Tower antennas, the total height of the Sears Tower increases to 1,725 feet. Designed by the architectural firm Skidmore, Owings & Merrill for Sears, Roebuck & Company, the world’s largest retailer at the time, the 3.8 million RSF building is the preeminent office address in Chicago and one of the premier properties in the world. The property provides an irreplaceable West Loop location, unparalleled views from all of the property’s highly efficient floors and an unmatched prestige.
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First tower was hit between the 93rd and 99th floor.\nSecond tower was hit between the 77th and 85th floor.
74425
You would need to consult the designer on that one. No man could possibly know the answer to that unless he knew the plans of, or what was on the mind of God.
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Hoover Dam. The Hoover Institution. The Hoover Commission. The Hoover Tower at Stanford University.
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I think you muts haev swicthed the letrers...\n\nhttp://sears401k.csplans.com/
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There is some disagreement as to what definition should be give for tallest.  Should it be the highest occupable floor? Should antennas be included? etc.  The Council on Tall Buildings and Urban Habitat defined four categories in which the "world's tallest building" can be measured:\n\n   1. Height to the structural or architectural top (including spires and pinnacles, but not antennas, masts or flagpoles)\n   2. Height to the highest occupied floor\n   3. Height to the top of the roof\n   4. Height to the top of antenna\n\nThe current record holders in each category is as follows:\n\nTaipei 101 leads in the first category with 508 m (1,667 ft); in the second category with an occupied floor at 438 m (1,437 ft); and in the third category with 448 m (1,470 ft).\n\nThe Sears Tower leads in the fourth category with 527 m (1,730 ft).
105574
I don't think this question can be answered without more details.  What kind of tower?  Do you have an example of one?  Do you want pictures?
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I put "wire rope" + 1848 into the Yahoo search engine and came up with John A. Roebling, a German immigrant and engineer who invented wire rope and had a factory in Trenton, NJ. The famous landmark would be the Brooklyn Bridge.\n\nIf you need more info, try what I did in your search engine. There is a lot of information, plus the building of the Brooklyn Bridge is a fascinating story, particularly with regard to Roebling himself. Some great old photos, too. Thanks for this interesting question.  I learned something new today.
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Heres a great page on the history and creation of the elevator:\n\nhttp://inventors.about.com/library/inventors/blelevator.htm
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The Sears Tower is an example of the revolutionary bundled-tube structural design. Tube buildings gain most of their structural support from a rigid network of beams and columns in their outer walls. The rigid outer walls act like the walls of a hollow tube. The Sears Tower is actually a bundle of nine tubes, and is considered one of the most efficient structures designed to withstand wind. This is a great design for a skyscraper in Chicago, the "Windy City," where the average wind speed is 16 miles per hour. As the building climbs upward, the tubes begin to drop off, reducing the wind forces on the building. The Tower's heavy weight -- more than 440 million pounds -- is also supported by 114 piles sunk deep into the earth so that they stand firmly on hard, solid bedrock.
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John C. Frémont PathMAKER of the West\n\nPlease take time to select the best answer.
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The Al Faisaliah Tower\n\nor\n\nKingdom Tower (Aka Kingdom Center)
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Shreepati Arcade \n\nAND\n\nIt is the six highest residential scrapers in the world \n\n• Sears Tower, Chicago: 110 storey \n• Empire State building, New York: 102 storey\n• Baiyoke Towers, Thailand: 90 storey\n• Petronas Twin Towers, Kuala Lumpur: 88 storey\n• Tentex Building, Taiwan: 85 storey\n• Shreepati Arcade, Mumbai: 45 storey\n\n\nBUT\n\nThey are planning to have the tallest in the world soon ( That is if they beat the United Arab Emirates first) - follow link
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Philo T. Farnsworth \nhttp://www.ideafinder.com/history/inventors/farnsworth.htm
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John Lovitz\n\nhttp://cweek.mysite4now.com/uploadimages/photogallery/2006710113923_JonLovitz.jpg
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the replacement twin towers - looks amazing
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I believe it might have been Gustave Eiffel.  He's most famous for the Eiffel Tower, but he used steel frames in buildings before that.  It's interesting that he sometimes put the steel frame on the outside of the structure, rather than the inside.  A good example of this is the Nestlé chocolate factory in Noisiel, France