AISC Seeks Research Proposals for Uncoated Weathering Steel Reference Manual

September 2, 2020


CHICAGO - The American Institute of Steel Construction and the National Steel Bridge Alliance are seeking proposals for a reference manual that lays out the design, detailing, and maintenance of uncoated weathering steel (UWS) in bridge applications.

Proposals for this research project are due September 30, 2020.

"The simple fact that uncoated weathering steel (UWS) isn't an applied coating system and doesn't require application and drying time in the fabrication shop makes it the most economical and efficient corrosion protection strategy for steel bridges," said NSBA Director of Market Development Jeff Carlson, PE.   

When properly designed and detailed, bridges made of unpainted weathering steel can achieve service lives of up to 120 years with minimal maintenance. This high-strength, low-alloy steel forms a tightly adhering patina during its initial exposure to the elements. The patina is essentially an oxide film of corrosion by-products about the same thickness as a heavy coat of paint. 

Additional information, including the criteria by which AISC will evaluate proposals and details on funding, is available at 


For more information contact:

Dani Friedland
Director of Marketing Communications

American Institute of Steel Construction

The American Institute of Steel Construction, headquartered in Chicago, is a non-partisan, not-for-profit technical institute and trade association established in 1921 to serve the structural steel design community and construction industry. AISC's mission is to make structural steel the material of choice by being the leader in structural steel-related technical and market-building activities, including specification and code development, research, education, technical assistance, quality certification, standardization, market development, and advocacy. AISC has a long tradition of service to the steel construction industry of providing timely and reliable information. 

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