Corrosion of galvanized fasteners used in cold-formed steel framing

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

Direct Strength Method (DSM) Design Guide

The following Design Guide has been developed under the direction of the American Iron and Steel Institute Committee on Specifications for the Design of Cold-Formed Steel Structural Members. The development of the Guide was sponsored by the American Iron and Steel Institute. The AISI Committee on Specifications wishes to acknowledge and expresses gratitude to Dr. Benjamin Schafer of Johns Hopkins University who was the author of this Guide. With anticipated improvements in understanding of the behavior of cold-formed steel and the continuing development of new technology, this material might become dated. It is possible that AISI will attempt to produce updates of this Guide, but it is not guaranteed. The publication of the material contained herein is not intended as a representation or warranty on the part of the American Iron and Steel Institute, or of any other person named herein. The materials set forth herein are for general information only. They are not a substitute for competent professional advice. Application of this information to a specific project should be reviewed by registered professional engineer. Anyone making use of the information set forth herein does so at their own risk and assumes any and all resulting liability arising therefrom

Light Gage Steel Design Manual

Mode of access: Internet

Standard for Cold-Formed Steel Framing -- General Provisions

The material contained herein has been developed by the American Iron and Steel Institute Committee on Framing Standards. The Committee has made a diligent effort to present accurate, reliable, and useful information on cold-formed steel framing design and installation. The Committee acknowledges and is grateful for the contributions of the numerous researchers, engineers, and others who have contributed to the body of knowledge on the subject. Specific references are included in the General Provisions document. With anticipated improvements in understanding of the behavior of cold-formed steel framing and the continuing development of new technology, this material may eventually become dated. It is anticipated that AISI will publish updates of this material as new information becomes available, but this cannot be guaranteed. The materials set forth herein are for general purposes only. They are not a substitute for competent professional advice. Application of this information to a specific project should be reviewed by a design professional. Indeed, in many jurisdictions, such review is required by law. Anyone making use of the information set forth herein does so at their own risk and assumes any and all liability arising there from