The Sheet Metal and Air Conditioning Contractors’ National Association (SMACNA) has released an app for the third edition of its manual, HVAC Duct Construction Standard—Metal and Flexible. The program provides a simplified process for finding construction options for rectangular ducts with dimensions up to 3048 mm (120 in.) for applications discussed in the manual. It offers options for external and internal reinforcements, specifically angles and electrical metallic tubing (EMT) conduit tie rods, respectively. The app provides users with a written description of the duct, as well as a visual image of it. It is intended to be used in conjunction with the manual, and is largely used for onsite work. It is available at the Apple App Store or Google Play. For more information, or to purchase the manual, visit www.smacna.org/bookstore.
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