How Bridges Work
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Scan day: 11 February 2014 UTC
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Description: Review of how the forces act on different types of bridges. Includes photos of real bridges.
There are more than half a million bridges in the United States, and you rely on them every day to cross obstacles like streams, valleys, and railroad tracks. But do you know how they work? Or why some bridges are curved while others are straight? Engineers must consider many things -- like the distance to be spanned and the types of materials available -- before determining the size, shape, and overall look of a bridge.
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| Page title: | BUILDING BIG: Bridge Basics |
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| IP-address: | 54.197.116.127 |
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| Date | Creation Date: 1995-04-19T04:00:00Z Expiry Date: 2021-04-20T04:00:00Z |