what is the tallest building in the U.S.?
815820
The Sears tower in Chicago.
954996
The tallest free standing structure is the CN Tower in Toronto Ontario Canada 1815feet 5 inches. It has restaurents and many other facilities in side so it is not just a hollow tower\nThe tallest office/residential building is Taipei 101 in Taiwan it is1667 feet tall
21980
http://en.wikipedia.org/wiki/World's_tallest_structures
423782
The largest building in North America is also the largest building in the world.  It's owned by Boeing aircraft, and is located in Everett, Washington.  It encloses 472 million cubic feet (13.3 million cubic meters) of space.
632566
A skyscraper is any building over 10 stories. A mountain is 1000 feet high.
197364
I don't know about tallest, but highest:\n1) Everest\n2) K2\n3)Kangchenjunga\n4)Makalu\n5)Cho Oyu
1078536
400'?!?!  Not that I have ever heard of.  You saw a PBS special about one?  Was it a prototype or theoretical?  \n\nI think the tallest U.S. platform trucks top out at about 175' (see attached link to article).  There is a European manufacturer, Bronto Skylift, whose tallest unit is about 88 meters (that's not quite 300').  I think that the tallest trucks currently in the world.\n\nCheck the site out, it's pretty impressive stuff!
51378
It is the fourth tallest building in the US (three of which are in Chicago, one in NY). It is the 16th tallest in the world.
526639
yeah, a HUGE new tower bigger than both the original towers..\n\nIts called the Freedom tower, see link:\n\nhttp://www.lowermanhattan.info/news/revised_freedom_tower_reflects_16531.asp
30946
The Taipei 101 is the tallest building in the world at 509 metres / AP\n\nWorld's tallest towers\nFrom:  By Sara Clemence\nJanuary 18, 2006 \n \n \nThe Taipei 101 is the tallest building in the world at 509 metres / AP \n  \nFICTIONAL film apes aren't the only creatures drawn to great heights. Human beings have always been looking for ways to escape the ground--by building machines that fly or structures that stretch into the clouds.\n\nBut many of today's tallest are so high that even King Kong would get vertigo. \nWhen it comes to those buildings, what constitutes "tall" varies from place to place and year to year. The loftiest buildings in Europe are waist-high to those in the New World. \n\nIconic American buildings that once held records have been bumped down by new skyscrapers in Asia, which in coming years will be surpassed by new structures, including the Freedom Tower in New York City, Burj Dubai in the U.A.E., and others still on the drawing boards.
875116
Building: Center of India Tower (proposed) \nCity :Katangi \nHeight: 667 m \nFloors: 224\n\nCenter of India Tower (CoIT), also known as Center of Vedic Science, is a proposed structure which when completed would be the tallest building in India and second tallest in the world behind Burj Dubai. \n\nShreepati Arcade (Mumbai) \nHeight: 161 m \nFloors :45 \nis the fully constructed tallest building.\n\nRight now Mumbai Television Tower (Mumbai) at  300 m is the tallest tower in India.
252607
Petronas Tower in Kuala Lampur,\nEmpire State Building in US
761687
Building - to top of antenna Sears Tower \n\nBuilding - to architectural top Taipei 101 \n\nthere is different catagories...
156632
Johnston Island in the Hawaii island chain (717 miles W.S.W. of Honolulu) reaches its greatest height of 44 feet in "Summit Peak" near its eastern end.\n\nThat was fun!
888055
It depends on who does the measuring! Skyscraper buffs disagree on whether features like flagpoles, antennas, and spires should be included when measuring building height. \nAlso under dispute is the question of what, exactly, constitutes a building. Technically, observation towers and communications towers are considered structures, not buildings, because they are not habitable. They do not have residential or office space. \n\nSoaring 1,670 feet (509 meters), the Taipei 101 Tower in Taipei, Taiwan appears to be the world's tallest building. But the Taipei 101 Tower's massive 60-foot spire contributes to much of that height. \n\nBefore the Taipei 101 Tower was completed, the Petronas Twin Towers in Kuala Lumpur, Malaysia were described as the tallest buildings in the world. But, like the Taipei 101 Tower, the Petronas Twin Towers get much of their height from spires, not from usable space. \n\nIf you count only habitable space and measure from the sidewalk level of the main entrance to the structural top of building (excluding flagpoles and spires), then Chicago's Sears Tower, built in 1974, may still be the tallest building in the world. \n\nBut none of these buildings will keep their rankings for long. Even taller buildings are on the drawing board. Freedom Tower at the new World Trade Center in New York City is expected to rise 541 meters (1,776 feet) tall, including its enormous spire. \n\nHowever, if spires, flagpoles, and antennas can be counted when we measure building heights, perhaps rankings of the World's Tallest Buildings should include all man-made structures, whether or not they contain habitable space. In this case, the CN Tower in Canada is the world's tallest building. The communications tower and tourist attraction measures 553.33 meters (1,815 ft., 5 inches) tall. \n\nhttp://architecture.about.com/library/bltall.htm
591290
If u mean the tallest tower, not biggest it should be:\n\nTower, city Year Height (m) Height (ft) \n\n*Canadian National (CN) Tower, \nToronto, Canada 1975 553 1,815 *\n\nOstankino Tower, \nMoscow, Russia 1967 537 1,762 \n\nOriental Pearl Tower, \nShanghai, China 1995 468 1,535 \n\nMilad Tower,\nTehran, Iran 2005 435 1,427 \nMenara Kuala Lumpur, \nKuala Lumpur, Malaysia 1996 421 1,403 \n\nCentral Radio & TV Tower, \nBeijing, China 1992 405 1,329 \n\nTianjin TV Tower,\nTianjin, China 1991 415 1,362 \n\nKiev TV Tower,\nKiev, Ukraine 1973 385 1,263 \n\nTashkent Tower, \nTashkent, Uzbekistan 1985 375 1,230 \n\nLiberation Tower,\nKuwait City, Kuwait 1996 372 1,221 \n\nAlma-Ata Tower,\nAlmaty, Kazakhstan 1983 371 1,217 \n\nRiga TV Tower,\nRiga, Latvia 1987 368 1,209 \n\nFernsehturm Tower, \nBerlin, Germany 1969 368 1,207 \n\nStratosphere Tower, \nLas Vegas, United States 1996 350 1,149 \n\nMacau Tower,\nMacau, China 2001 338 1,109
68459
The world's tallest building is Taipei 101 in Taipei, Taiwan.  It towers above the city at 101 stories.