The SMACNA® Seismic Restraint Manual Guidelines for Mechanical Systems 4th Edition and Rectangular Industrial Duct Construction Standards 3rd Edition are now available for ANSI 45-day public review and comment.
Seismic Restraint Manual Guidelines for Mechanical Systems (45 Day Public Review)
This fourth edition of the Seismic Restraint Manual: Guidelines for Mechanical Systems has been updated to conform to the International Code Council for anchorage capacities.
All Seismic Reinforcement Brace (SRB) tables have been updated to provide users with more SRB options including the addition of new tables. Refreshed instructions for using the guidelines. Chapter 9 expansion anchor tables have been updated with new tables. New Appendix B to assist in determining the weight of the duct or pipe to be braced. Many new and updated details have been included to align with changes made throughout the document.
Click here to participate in the 45-day review for Seismic Restraint Manual Guidelines for Mechanical Systems.
Rectangular Industrial Duct Construction Standards (45 Day Public Review)
This third edition of the Rectangular Industrial Duct Construction Standards includes many of the same assumptions as the first and second edition with a number of added features.
Expanded panel pressure capacity tables and stiffener spacing options for carbon and coated steel, stainless steel and aluminum to accommodate larger ducts and allow for added duct construction options. Stainless steel panel pressure capacity tables added for Class 2, 3 and 4 applications with additional stainless steel operating temperature design capabilities. Laboratory testing, physical testing and data analysis on rectangular duct was completed to further evaluate side wall shear capacities of local buckling to those already introduced in the first and second edition.
Apr 1, 2025 — Member Update
Aug 26, 2025 - Dan Hampton, Roeland Hoeke, Mike Steidel, and Sal Tortorici have been nominated to serve a 4-year term on SMACNA's Board of Directors. The election will take place at the Annual Business Meeting during the upcoming SMACNA Annual Convention.
Aug 26, 2025 - Join your fellow professionals in Austin, TX for the top technology conference in the entire industry and learn more about the trends and best practices that will shape the future!
Aug 26, 2025 - ACHR News webinar featured HVAC policy thought leaders to help industry stakeholders better understand the impacts of this sweeping new law on the both the contracting industry and the key energy efficiency HVAC provisions.