Gauge Of Sheet Metal Used For Air Condidtioning Ductwork

Unless otherwise specified steel sheet and strip used for duct and connectors shall be g 60 coated galvanized steel of lockforming grade conforming to astm a653 and a924 standards.

Gauge of sheet metal used for air condidtioning ductwork. The thinnest acceptable sheet metal for ductwork used in a single dwelling is 28 gage or 0 013 and 0 018 inches for galvanized and aluminum respectively. This measurement is for around duct smaller than 12 inches in diameter and a rectangular section no bigger than 8 inches. One end of each piece is crimped for easy fitting of consecutive joints or to sheet metal fittings and flexible duct. As such it needs to be effective.

Round ducts and enclosed rectangular ducts 14 inches or less minimum thickness 0 0157 equivalent galvanized gauge size 28. Above ground duct systems shall conform to the following. Kennedale tx 76060 phone 817 478 0801 fax 817 483 6571 page 5 of 43 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. Suburban sheet metal ltd mailing address p o.

Galvanized steel shall conform to astm a 653. 1 inch 25 4 mm 1 smacna sheet metal and air conditioning contractors national association recommended gages for circular ducts for heating and general ventilation work recommended gages for circular ducts for industrial exhaust work. While sheet metal has been one of the most commonly used materials for ductwork advances have opened the door to several other types of material that are also used to create ductwork. Minimum thickness of metal duct material shall be as listed in table m1601 1 1 2.

Minimum yield strength for steel sheet and reinforcements is 30 000 psi 207 kpa. Box 739 kennedale tx 76060 physical address 528 s.