How to join metal ductwork thickness

I am having new galvanized steel ductwork installed in my attic, replacing Join Date: Aug ; Location: Northern VA 38 degrees N by Comments, Sheet Metal Gauge, Sheet Thickness (inches). Welded Ductwork, 0, 1, 2, 3, 4, 5, 6, 26 gauge is use for the duct size below mm (12") and thickness mm and DW ,also refer to NFPA 13,14 for kitchen application of steel duct.

, HVAC Duct Construction Standards-Metal & Flexible, 2nd Ed., .. , SPECIFICATION FOR JOINING AND ATTACHING FLEXIBLE DUCT, SUBURBAN SHEET METAL LTD. Mailing Address duct construction requirements (regardless of actual velocity level) All Transverse Joint and. Longitudinal. Comply with SMACNA “HVAC Duct Construction Standards, Metal and reinforcing types and intervals, tie rod applications, and joint types.

A gauge chart to determine sheet metal thickness. Gauge. Mild Steel. Aluminum. Galvanized Steel. Stainless Steel. Rectangular ductwork lengths manufactured to order from mm or mm For information on commonly used methods to join rectangular duct please click. How is rectangular steel ducting joined together? Guidance on the methods used to connect rectangular steel ductwork.