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About This Item
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.
Recognizing the increased popularity of FRP ductwork, this expanded edition includes commercial/HVAC applications. Supporting this, an underground installation section is added 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," 2nd edition, 2016, is available in both book and PDF formats. Subscriptions are also available at www.smacna.org/subscriptions.