Updated AISC Specification for Safety-Related Steel Structures for Nuclear Facilities Available for Public Review

May 3, 2023


CHICAGO - A draft of the next edition of the AISC Specification for Safety-Related Steel Structures for Nuclear Facilities (AISC N690) is now available for public review and comment.

The 2024 update of N690 will supersede the 2018 version.

The updated version includes:

  • Updates to generally align with the 2022 edition of the Specification for Structural Steel Buildings (AISC 360)
  • New provisions to address differential settlement and elevated temperatures
  • Modifications to the nondestructive testing provisions for ultrasonic and radiographic testing
  • Updates to the requirements for steel-plate composite elements incorporating the latest research
  • A new appendix pertaining to impactive and impulsive loading

The draft will be available as a free download at between May 3 and June 1, 2023. If you’d prefer to review a hard copy, please contact Martin Downs at; there is a $35 nominal charge for printed copies.

Please submit comments using the form provided online or by email to Nathaniel Gonner ( by June 1, 2023, for consideration.


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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