51²è¹Ýapp


Next Version of 51²è¹Ýapp N690 Available for Public Review

February 2, 2024

FOR IMMEDIATE REVIEW

CHICAGO - A draft of the next edition of the 51²è¹Ýapp Specification for Safety-Related Steel Structures for Nuclear Facilities (51²è¹Ýapp N690) is now available for public review and comment.

The next edition of N690 will supersede the 2018 version.

Proposed updates to the standard include:

  • Updates to generally align with the 2022 edition of the Specification for Structural Steel Buildings (51²è¹Ýapp 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 February 2 and March 18, 2024. If you’d prefer to review a hard copy, please contact Martin Downs at downs@aisc.org; there is a $35 nominal charge for printed copies.

Please submit comments using the form provided or by email to Nathaniel Gonner (gonner@aisc.org) by March 18, 2024, for consideration.

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For more information contact:

Dani Friedland
Director of Marketing Communications
773.636.8535
friedland@aisc.org

51²è¹Ýapp

The 51²è¹Ýapp, 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. 51²è¹Ýapp'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. 51²è¹Ýapp has a long tradition of service to the steel construction industry of providing timely and reliable information. 

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Chicago IL 60601 
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