Sheet Metal Smacna Duct Gauge Chart

Duct velocity calculate velocities in circular and rectangular ducts imperial and si units online calculator.

Sheet metal smacna duct gauge chart.

Sheet metal connectors inc. Sheet metal and air conditioning contractors. Howard iii sheet metal and air conditioning contractors national association. Documents preceding 3rd edition hvac dcs hvac duct construction standards metal and flexible.

26 gauge is use for the duct size below 300 mm 12 and thickness 0 5 mm. A quick overview of the changes is provided in the front of this manual. Low and medium velocity duct system. Sheet metal gauge size chart gauge or gage sizes are numbers that indicate the thickness of a piece of sheet metal with a higher number referring to a thinner sheet.

Click here to purchase the full version from the ansi store. Shop standards comply with the 2005 3rd edition of the smacna hvac duct construction standards. Here are the few gauge system as per smacna standards. Sheet metal standards duct guage and enforcing for 1 ess drive gauge of metal duct dimensions 5 joint 4 joint 2 5 joint 2 joint joint construction.

As per smacna the gauges of ducting sheet varies and depends upon the width of the duct and type of application of a particular project. All duct stiffened by machine formed beads spaced at 12 o c. Metric conversion chart a 6 duct surface area in square feet per lineal foot. Tdc duct constructed per smacna standards first edition 1995 2.

Duct fabricated using pittsburg seams. History of architectural metals first used by the ship building industry lead used in the 1500s with rolled copper use starting in late 1600s new york city hall used copper for roofing circa 1764 a copper roof was used on the rebuilt old senate chamber in 1819. The equivalent thicknesses differ for each gauge size standard which were developed based on the weight of the sheet for a given material. Ductwork seal classes ductwork prone to air leakages.

Smacna testing and research institute verified that sheet metal connectors inc. Check with factory for availability of 72 in 26 gauge galvanized note. Ductwork support ductwork support and recommended. This second edition of the smacna commercial metal and flexible duct construction standards is another in a long line dating from the 1950s.

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