Kennedale tx 76060 phone 817 478 0801 fax 817 483 6571 page 6 of 43 sheet metal standards duct guage and enforcing for 1 ess drive heavy ga metal gauge of metal duct dimensions 5 joint 4 joint 2 5 joint 2 joint. Ansi the american national standards institute has accredited smacna as a standards setting organization. Smacna sheet metal and air conditioning contractors national association.
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