Seim agrees: "Designers will create a successful orthotropic deck bridge if they use these codes," he says.
I am not aware of any universities in the United States that offer a class or seminar focused on orthotropic deck bridge design.
By integrating the structural system and the driving surface, orthotropic deck bridges are more lightweight and efficient on long-span structures.
In fact, major orthotropic viaducts in Tokyo are composed of more than 1,100 spans, and there are more than 250 orthotropic deck bridges of various sizes throughout the country.
In fact, the Federal Highway Administration (FHWA) and many other organizations recently sponsored the world's first conference in nearly 30 years focused exclusively on orthotropic deck bridges.
Today, the United States is home to about 50 orthotropic deck bridges, several of which have earned their place among the Nation's famous spans--including the San Diego-Coronado and San Mateo-Hayward Bridges in California.
In southeast Alaska, for example, the agency uses eight movable orthotropic deck bridges to transfer vehicles from State-run ferries to the shore.
designers have managed to carve a niche for orthotropic deck bridges in the domestic and overseas markets despite the lack of standardization.
With a followup conference in the works for 2008 and plans to create a permanent specialty subgroup within ASCE to focus on orthotropic bridges, proponents are confident that orthotropic deck bridges will continue to proliferate as a vital component in the toolbox of American transportation engineers.
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