This report was developed by the NAHB Research Center for the Steel Framing Alliance and other shareholders in ILZRO’s research program SC-4, Galvanized Steel Framing for Residential Buildings. This report replaces the previous report issued in September 2003.

The initial objective of this project was to investigate the corrosion performance of galvanized steel framing components in residential construction by measuring actual corrosion rates of steel framing members over a 3-year period and correlating these to environmental conditions. After completion of the initial phase of work, the monitoring period was extended
to 5 years and later to 7 years. The findings of this study validate the adequacy of current industry corrosion protection requirements and provide additional basis for promoting the long-term durability of cold-formed steel framing.