AISC - American Institute of Steel Construction

09/15/2025 | Press release | Distributed by Public on 09/15/2025 13:32

AISC 358-27 Prequalified Moment Connection Standard Available for Public Review


AISC 358-27 Prequalified Moment Connection Standard Available for Public Review

September 15, 2025

FOR IMMEDIATE RELEASE

CHICAGO - The AISC standard Prequalified Connections for Special and Intermediate Steel Moment Frames for Seismic Applications (AISC 358-27) is available for public review from September 15 until November 3, 2025.

This version includes the following changes:

  • General updates to bolting requirements in applicable chapters.
  • Chapter 6 (End Plate) updates to the bolt shear and bearing/tearout check to be consistent with the AISC Specification. The welding requirements for moderately ductile built-up sections have also been updated to alleviate the susceptibility to brittle fracture.
  • Chapter 10 (ConXtech ConXL) updates to the collar bolt specification and other miscellaneous updates.
  • Chapter 12 (Simpson Strong-Tie) updates that expand the connection prequalification limits.
  • Chapter 15 (DuraFuse Frames) updates that expand the connection prequalification limits.

The standard is available for free download on the AISC website at aisc.org/publicreview, along with the review form. Copies are also available (for a $35 nominal charge) by contacting Martin Downs at [email protected]. Please submit comments using the forms provided online by November 3, 2025, for consideration.

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For more information contact:

Dani FriedlandDirector of Marketing [email protected]

American Institute of Steel Construction

The American Institute of Steel Construction (AISC), a not-for-profit technical institute supported by the steel industry, partners with the architecture, engineering, and construction (AEC) community to develop safe and efficient steel specifications and codes while driving innovation to make steel the most sustainable, economic, and resilient structural material. For more than a century, AISC has been a reliable resource for information and advice on the design and construction of domestically fabricated structural steel buildings and bridges.130 E. Randolph St, Suite 2000Chicago IL 60601 312.670.2401 https://www.aisc.org

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