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Reason for
selection:
D Runway of Haneda Airport is a part of the re-expansion project and important social capital, which is required to last 100 years with reasonable maintenance cost.
For the bridge
portion of the project, the stainless steel types described below were selected
over organic coated carbon steel, which was not considered durable enough, and
titanium-clad material, whose initial cost was considered too high. Deciding
factors in favor of stainless steel included its high resistance against
seawater corrosion as well as superb LCC. In addition, studies were made to
reduce sheet thicknesses and a welding method ? indirect resistance seam
welding -suited for the application was employed to maximize its cost
advantages.
This
project has opened up great possibilities for wider use of stainless steel in
similar projects in the future and thus deserves the highest award.
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