Thursday, February 4, 2010

Building Bridges


This is an update of the construction of the new Roslyn Viaduct. I have shown you some photographs of this before. The new bridge is 2000 feet in length, and is made up of two separate spans which will be joined side to side when it is finished. The first span is completed, and they are assembling the second span. Each span is made up of "concrete box sections" which are prefabricated and shipped to the site by barge. I am guessing that there are almost one hundred sections connected together to make one span! And these things are HUGE! I kid you not. This photograph shows one assembly in the foreground which is made up of 4 segments. They are held together with steel cables running through them, that are stretched hydraulically. It is a huge project, and fun to walk around a look at it and photograph it. Click on this for a larger size, so you can see the other sections in the background.

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