Bridge Structures

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Issue:

Miscellaneous

 

Written by:

Paul W

 

Date added:

March 25, 2014

 

Level:

University

 

Grade:

B

 

No of pages / words:

2 / 493

 

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5050 times

 

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Essay content:

Without geometry, the bridges would not be safe. Bridges have been around for a long time. The earliest bridges were probably formed by laying one or more logs across a brook or by stretching ropes or cables across a narrow valley. Those types of bridges are still in use. Wooden-beam bridges appear to have been the most common type known to the ancients, although according to the tradition a brick-arch bridge was built about 1800 BC in Babylon...
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Other forms, such as simple suspension and cantilever bridges, are known to have been used in ancient India, China, and Tibet. Pontoon bridges were used in the military expeditions of the Persian monarchs Darius I and Xerxes I. The Romans built many timber-trestle bridges. Surviving roman bridges, however usually have a level road supported on one or more semicircular stone arches...
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