New Technical Resource Bulletin (TRB)

From the Technical Resources Department. Update to the SMACNA HVAC Duct Construction Standards, Metal and Flexible, Fourth Edition, Figure 2-18 Corner Closures - Flanges.

This technical resources bulletin updates the language for corner fastening requirements used in conjunction with the T-25a and T-25b flanged transverse joint assembly.

TRB #01-25 Figure 2-18 Corner Closures - Flanges

Nov 24, 2025 — Member Update

Latest Articles

New Technical Resource Bulletin (TRB)

Nov 24, 2025 - From the Technical Resources Department. Update to the SMACNA HVAC Duct Construction Standards, Metal and Flexible, Fourth Edition, Figure 2-18 Corner Closures - Flanges.

Announcing the Exhibit Hall at the 2026 MEP Innovation Conference

Nov 19, 2025 - The Exhibit Hall is the central hub of the conference—designed for hands-on discovery, live demos, and meaningful conversations with the industry’s leading innovators.

SMACNA Convention Interview: Todd Hill and Mike Coleman

Nov 18, 2025 - SMACNA’s President and SMART’s General President discuss the ongoing labor management partnership and their hopes for the coming year.