Skywalk / Grand Canyon Arizona USA
Skywalk là cây cầu làm bằng kính đã được khánh thành ngày hôm nay
20/3/2007 tai Grand Canyon , Arizona Hoa-Kỳ
Đây là cây cầu độc nhất vô nhị vì nó được lam bằng kính trong suốt
để du khách vừa bước trên cầu vừa ngắm cảnh Grand Canyon ở
dưới chân mình.
Upon completion, the Glass Bridge will be suspended 4,000 feet above the Colorado River on the very edge of the Grand Canyon. On May 2005, the final test was conducted and the stucture passed engineering requirements by 400 percent, enabling it to withstand the weight of 71 fully loaded Boeing 747 airplanes (more than 71 million pounds). The bridge will be able to sustain winds in excess of 100 miles per hour from 8 different directions, as well as an 8.0 magnitude earthquake within 50 miles. More than one million pounds of steel will go into the construction of the Grand Canyon Skywalk
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