Alternative Title

Research report RP04-4

Abstract

This research program investigated the potential for corrosion of galvanized fasteners used in cold-formed steel framing by exposing test samples to a variety of environmental conditions frequently found in Hawaii and elsewhere. The results of this research will aid in the evaluation of galvanized fasteners in various exposure conditions. Five field enclosures were constructed on the island of Oahu at coastal locations on both windward and leeward shores, and in the interior of the island. Each field enclosure represented various aspects of typical cold-formed steel construction and was equipped with a complete weather station. This report details the design, construction and first two years of exposure of the field enclosures. Continued monitoring of the enclosures will depend on availability of funding and permission to leave the enclosures in place beyond the initial project timeframe. Standard cold-formed steel connections with galvanized screws have been placed in various locations within each of the field enclosures as a controlled study of the performance of galvanized fasteners in typical CFS framing construction. This report outlines the selection of the screwed connection details, and test results after 7 months exposure in the field enclosures. Identical screwed test connections have also been subjected to a cyclic salt spray routine in a corrosion chamber to induce accelerated corrosion. The effect of this cyclic routine on the strength and ductility of the connections is reported after 2700 cycles in the corrosion chamber. Based on the results of this study, recommendations are made for the protection of coldformed steel framing and fasteners in coastal environments.

Department(s)

Civil, Architectural and Environmental Engineering

Research Center/Laboratory(s)

Wei-Wen Yu Center for Cold-Formed Steel Structures

Sponsor(s)

American Iron and Steel Institute
Steel Framing Alliance

Publisher

American Iron and Steel Institute

Publication Date

1-1-2004

Document Version

Final Version

Rights

© American Iron and Steel Institute

Document Type

Report - Technical

File Type

text

Language

English


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