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Location: Douglas County, Washington
Length: 309.6 feet
Width: 32 feet
Area: 9907 square feet
Year Installed: 2003
The Chief Joseph Dam Bridge utilizes glulam beams in its approach spans and a historic timber truss in its main span. A new FRP deck was installed in late 2003 and was Martin Marietta Composites’ first bridge to utilize timber beams. DuraSpan® allowed preservation of this historic truss, of which only few of its type still exist.
DuraSpan deck was used to reduce the bridge's dead load and increase its live load capacity. DuraSpan also cantilevered over the bridge's fascia beams to widen the bridge by 6' to accommodate modern traffic lanes. The deck was pigmented to match the existing timber truss and the deck was covered with an asphalt overlay. In this case, DuraSpan deck was the most practical means for preserving the bridge while upgrading it to modern standards. |
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