How long does hot-galvanized structural steel last in typical exterior environments? 2

[abusementpark]

The subject says it all.

 

[TD2K]

http://events.nace.org/library/corrosion/MetalCoatings/Zinc-coatings.asp

 

[hokie66]

Similar format charts to those posted by TD2K, but looks like the time to first maintenance is a lot longer. It depends a lot on the thickness of the base metal, as the thicker the steel, the more zinc.

http://www.galvanizeit.org/images/u...eel_Time_to_First_Maintenance.pdf?tracked=yes

 

[abusementpark]

Thanks guys. I guess I need to look into how much galvanize is typically applied to structural steel.

 

[IFRs]

The thickness of zinc deposited should be part of the spec sent to the fabricator / galvanizer, usually in ounces per square foot, or in Grades per ASTM A123, sometime in mils.