TN-D200-07: Corrosion Protection for Cold-Formed Steel Framing in Coastal Areas

TN-D200-07: Corrosion Protection for Cold-Formed Steel Framing in Coastal Areas

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This Technical Note was originally published as TN140. Cold-formed steel framing may be subject to corrosion when exposed to moisture and salt, both of which are prevalent in coastal areas. The 2003 edition of this technical note, based on guidelines published by the Federal Emergency Management Agency (FEMA 1986) for metal connectors used in wood-framed construction, described the causes of accelerated corrosion in buildings located near the ocean and some larger saltwater bays, as well as the variation in the corrosive environments within a typical building. This 2007 update incorporates the ongoing corrosion study by Dr. Ian Robertson of the University of Hawaii Department of Civil Engineering, funded by the U.S. Department of Housing and Urban Development. The influence of terrain and wind direction on corrosion rates has been added to the original document. This Technical Note outlines available corrosion-resistant materials for cold-formed steel framing members and makes recommendations for buildings at various distances from the ocean and for different exposure conditions within an individual building.