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Bridge Structures Beginning of Paper and The Use of Geometry in Their Design What is a bridge? A bridge is a structure providing continuous passage over a body of water, roadway, or valley. Every bridge looks different from the another. Their bridge structure is different. There are nine types of main bridges. Brid .... Middle of Paper .... 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. One of the most famous bridges would be The Pont du Gard at Nimes, France. It has three tiers of arches rising 155 feet above the Gard River, spans a distance of 855 feet. It was built in the late 1st century BC or the early 1st century AD. The cantilever bridge is characterized by spans that are supported not at the ends but near the center of the grider or .... 485 words | 2 pages Subscription Length Price Join 30 days membership (recurring) $19.95 90 days membership (recurring) $39.95 180 days membership (non-recurring) $69.95