Sheet Metal & Air Conditioning Contractors’ National Association

SMACNA Press Releases

SMACNA'S updated "Thermoset FRP Duct Construction Manual" available

Jul 28, 2017

CHANTILLY, VA—Recognizing the increased popularity of FRP ductwork, the second edition of SMACNA's “Thermoset FRP Duct Construction Manual” is now available.Thermoset FRP Duct Construction Manual

The 228-page book is an authoritative resource that design engineers, industrial engineering departments, pollution control authorities, FRP manufacturers, and installation contractors can rely upon for the proper selection, manufacture, and installation of FRP duct systems. 

This American National Standard (ANSI/SMACNA 011-2017) contains language, tables, and details for the construction of hand lay-up, spray-up, and filament wound FRP ductwork from 30 inch wg negative pressure to 30 inch wg positive pressure. Round ductwork sizes are expanded to include up to 96 inches diameter. For rectangular ductwork, new duct stiffener tables are added for easier selection. 

This expanded edition includes commercial/HVAC applications supported by an underground installation section as well as added language on testing and balancing, duct sealing, and duct leakage. Duct hangers and support information has been expanded and organized into a separate chapter which now includes: upper attachments, hanger selection tables, channel (strut) used as trapeze, riser support details, and more. Appendices cover extended hanger spacing, general information on safe handling of thermoset fiberglass reinforced plastic duct, and allowable FRP defects.

The “Thermoset FRP Duct Construction Manual,” second edition, 228 pages, 2016, is available in both book and PDF formats. Annual subscriptions may also be purchased. Order online at the SMACNA Bookstore

Non-member list prices are $159 for the book, $159 for the PDF, and $262 for the book/PDF combo. Discounted prices for architects, engineers, government, and code officials are $110 for the book, $110 for the PDF, and $182 for the two formats purchased together.  

The discounted price is available only to architectural and engineering firms and their employees provided they are not in the contracting business as well. (Government agencies, schools, and universities also qualify for the discount.) 

The Sheet Metal and Air Conditioning Contractors’ National Association is an international trade association representing 3,500 contributing contractor firms and is dedicated to promoting quality and excellence in the sheet metal and air conditioning industry. SMACNA has national offices in Chantilly, Va., outside of Washington, D.C., as well as on Capitol Hill. Visit for more information.