"Ed Huntress" wrote in message
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"Dan " Dan@ wrote in message ...
Is this the same steel they use to build bridge beams out of? I was
somewhere that had the bridge beams rusted purposely so they don't
have to paint them. It was either Duluth, or San Diego. How's that for
getting old? Can't remember where.

Yeah, that's the kind of application that Cor-Ten was made for.

We used Cor-Ten for the traffic signal mast arm structures in our town's
downtown area, but we did not leave them bare. Instead, we had them painted
them a color that was near to their final natural hue. The idea was that they
would never be painted again, but we would not have to concern ourselves about
pitting in any of the inevitable scratches inflicted during installation, and we
would not have to wait for them to age to a pleasing patina.

25+ years later, they are still doing fine.

Vaughn