The busiest bridge in the world is the George Washington Bridge. It connects Fort Lee, Bergen County, New Jersey to the Washington Heights neighborhood of Manhattan in New York City. More than 100,000,000 vehicles cross it every year.Continue Reading
The George Washington Bridge was opened for public use in 1931. The bridge also has a lower level, which was opened in 1962. The bridge has a total of 14 lanes, eight lanes on the upper level and six on the lower. This makes the George Washington Bridge the sole 14-lane suspension bridge in the world. The bridge was first named the Hudson River Bridge as it spans the Hudson River.
The main architect and designer of the bridge was Othmar Ammann. The bridge was estimated to cost $75,000,000 when its construction began in 1927. It is formed of exposed steel towers. The initial construction designed included a granite and concrete casing, but that idea was discarded due to higher costs and also the fact that exposed steel had an element of artistic superiority. The bridge has a main span of 3,500 feet, and at the time of its construction, it was the world's longest main bridge span until the Golden Gate Bridge opened in 1937.Learn more about Architecture
As of 2014, the largest beam bridge in the world is the Lake Pontchartrain Causeway in Louisiana. Northbound, the bridge span is 23.87 miles long while the southbound span is 23.86 miles long.Full Answer >
Viaducts are types of bridges; the term “viaduct” refers to long bridges or series of bridges that are connected to one another or structurally supported by arches or sturdy platforms between two end towers. As with bridges, viaducts may cross waterways or roadways, and exist primarily to provide an overhead passage to move trucks, cars, trains and pedestrians from one point to another.Full Answer >
Videos on bridge building can be found on a number of websites. Ron Hazelton Home Improvement Online (RonHazenton.com) has a video on how to build a wooden foot bridge. The website lays out detailed instructions in several steps, each accompanied by a separate video. The resulting laminated bridge spans 12 feet, rests on heavy block piers and has side rails and decking.Full Answer >
Although the first engineer to design a beam, or "girder," bridge is not known, some of the earliest examples have been found in East Asia and South America. These were often made using natural fiber ropes and vines.Full Answer >