Minimum metal thickness ducts sheet metal gauges engineering toolbox may 5th 2018 sheet metal gauges used in ductwork sheet metal gauge sheet thickness inches welded ductwork 0 smacna 1 ductwork 16 0 0625 17 0 0560 18 hvac duct construction standards public resource org may 6th 2018 each size in a pressure class has a minimum duct wall.
Smacna sheet metal gauge thickness.
1 smacna sheet metal and air conditioning contractors national association recommended gages for circular ducts for heating and general ventilation work.
Howard iii sheet metal and air conditioning contractors national association.
1 inch 25 4 mm.
Panel thickness gage pressure class as specified panel width height joint type spacing.
Galvanized sheet thickness tolerance a 2 manufactures standard gage thickness uncoated steel a 3 stainless steel sheet thickness a 4 aluminum sheet thickness alloy 3003 h14 a 5 metric conversion chart a 6 duct surface area in square feet per lineal foot a 7 galvanized sheet weight a 8 approximate weight round duct in pounds per lineal foot a 10.
Documents preceding 3rd edition hvac dcs.
Page 2 technical resources bulletin trb 5 09 update of trb 1 08.
Low and medium velocity duct system.
Flat seam roofs used in low no slope areas or areas subject to flooding or standing water typically made from 20 x 28 sheets relative geometry is important fro expansion and contraction sheet use efficiency and wind load.
The equivalent thicknesses differ for each gauge size standard which were developed based on the weight of the sheet for a given material.
24 gauge is use for the duct size up to 750 mm 30 and thickness is 0 6 mm.
22 gauge for duct size up to 1200 mm 48 thickness 0 8 mm.
Ansi smacna 006 2006 hvac duct construction standards eli p.
B the product contains data which is believed by smacna to beaccurate and correct but the data including all information ideas and expressions therein is provided strictly as is with all.
Minimum metal thickness for flatness.
Here are the few gauge system as per smacna standards.
Copper or stainless steel is recommended lock and seal all joints solder joints on slopes less than 3 12.
The final test reports demonstrate that fascia and coping constructed in accordance with the smacna architectural sheet metal manual resists very high pull off forces.
Located in headquarters outside washington d c the sheet metal and air conditioning contractors national association smacna an international association of union contractors has 1 834 members in 103 chapters throughout the united states canada australia and brazil.
