New Supplement to 2016 AISC Prequalified Seismic Moment Connection Standard Available as a Free Download

July 2, 2020


CHICAGO - Supplement No. 2 (ANSI/AISC 358s2-20) to the 2016 version of the AISC standard Prequalified Moment Connections for Special and Intermediate Steel Moment Frames for Seismic Applications (ANSI/AISC 358-16) has been fully integrated into the standard. 

Supplement No. 2 expands the prequalification scope of the SidePlate moment connection (Chapter 11), as well as the Simpson Strong-Tie Strong Frame moment connection (Chapter 12). The complete document is now available for free download at

The new standard has been approved by the AISC Connection Prequalification Review Panel (CPRP) and is ANSI-accredited. ANSI/AISC 358 is an essential companion to the AISC Seismic Provisions (ANSI/AISC 341-16), which outline the requirements for the prequalification of seismic moment connections in Chapter K.

Learn more about the standard, as well as other current AISC specifications and codes available as free downloads 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. 

130 E. Randolph St, Suite 2000
Chicago IL 60601