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Arizona DOT: Building A Freeway – Prestressed Box Girders

Posted by Infra on Monday, January 21st, 2013

Prestressed box girder: a beam made from concrete and steel; prestressed within its elastic limit to counteract stresses that occur under the bridge’s load.  Girder size depends on the unique design of a bridge.  These girders are 96 feet long and weight 93,000 pounds.
-ArizonaDOT on YouTube

Watch more videos from Arizona DOT’s Building A Freeway series 

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