This publication offers a standardized, engineered basis for design and construction of industrial ducts of Classes 1 to 5 air. Includes a spiral duct chapter for Classes 1 and 2 air that covers design pressures ranging from 30 in. wg negative to 50 in. wg positive, plus carbon and galvanized steel tables.
Expanded tables for stainless steel and aluminum, expanded tables for duct sizes up to 96 in. diameter, introduction of a new Duct Class 5 for systems handling corrosives and spiral lock seam pipe.




