This Microsoft Windows-based RIDCS design software package is designed to help designers of Air Pollution control and industrial ventilation systems select reinforcement alternatives in all areas of industrial duct manufacturing. This upgraded software version performs the complicated calculation of construction details, facilitating many of the calculations required in the selection of duct gage and reinforcement alternatives for industrial ducts. The program includes a spiral duct selection feature and an extensive calculation report. The software also comes with a hard copy of the Round Industrial Duct Construction Standards.