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Monday 16 January 2012

The World Longest Suspension bridge


Imagine an iconic bridge (the Golden Gate, for example), and chances are you've thought of a suspension bridge. These elegant structures are formed by literally "suspending" the road deck from steel cables strung between towers. This style will never measure as far as other types—viaducts like the Danyang-Kunshan Grand Bridge are supported from below by pylons and can thus stretch as long as needed—but suspension bridges rank among the lightest, strongest, and most beautiful bridges in the world.


At nearly four times the length of the Brooklyn Bridge, Japan's Akashi Kaikyo Bridge (also known as the Pearl Bridge) is the clear winner in this category. With three connected spans—two at 3,150 feet and one at 6,532 feet—the Pearl stretches a total of 12,831 feet across the Akashi Strait from the cosmopolitan port city of Kobe to Awaji Island (which, not coincidentally, is the hub of Japan's pearl industry). Japan gets hit with extreme weather conditions, and this bridge, completed in 1998, was built to withstand them all, including winds up to 179 mph and earthquakes up to 8.5 on the Richter scale. But that doesn't mean this bridge isn't a beauty: In addition to its connection to the Japanese pearl industry, the bridge gets its nickname from the lights on its cables, which are said to resemble a strand of colorful pearls at night.




the documentatry :)

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