ANSI approves SMACNA’s new HVAC duct construction standards

By Plant Engineering Staff October 24, 2006

The American National Standards Institute announced that the Sheet Metal and Air Conditioning Contractors’ National Association’s new “HVAC Duct Construction Standards %%MDASSML%% Metal and Flexible,” third edition, has been approved as an American national standard, designated ANSI/SMACNA 006-2006.

The 390-page “HVAC Duct Construction Standards %%MDASSML%% Metal & Flexible” manual is intended primarily for commercial and institutional duct construction. The standard contains tables and details for constructing ductwork for

The updated edition features expanded pressure class tables, separate tables for TDC/TDF construction and expanded tables for round duct construction, including 6-inch wg positive and negative pressure and sizes up to 96 inches. New is an engineering and design chapter to provide additional information to design professionals, double-wall construction details, new casing construction details and additional accessory items. The standard is applicable for construction using uncoated steel, galvanized and stainless steels and a limited range of aluminum ducts.