Titanium may be a viable option for corrosion resistant studs. They'd look kinda cool too.

Or exotics http://www.stbf.com/products.htm?kc=7uWHot24D2uBc5iXFXoPkmZ4f1NbYGY6dTUV8eXw

A buddy has a mil spec / issue titanium extension ladder. I believe it's Air Force issue? Talk about the ultimate light weight ladder.