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Bridges
Part 1 of Paper
.... significant innovations, the cofferdam and cement. The cofferdam is when the put wooden spikes in to the bottom of the river then used watertight clay over the spikes to make a bridge. Now today there are more efficient ways to make a bridge then just out of cement and clay. There are Suspension , Arch , Covered and .... Part 2 of Paper
.... the world, surpassing the Number Bridge in the UK, which has a center span of 1410 meters. The bridge has a wind-proof and earthquake-resident construction, withstanding winds up to 80 meters per second and earthquakes reaching from 8.5 on the Richter scale. This bridge is due to be completed in spring of 1999. There is a suspension bridge which spans the Seine estuary in Normandy, France. The decks of the bridge are designed as special curves so that wind flows across them as easily as over a .... |
| Number of words: 506 - Approximate pages: 2 |
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