Properly designed duct is critical to a well engineered motor room or industrial ventilation system. SMACNA standards are used for industrial duct in both round and rectangular designs.
duct is usually 10-gauge steel and is reinforced using 3 or 4 inch by ¼ inch bar stock stitch welded to the exterior. Duct is furnished with loose flanges for ease of assembly and include lifting eyes to simplify installation.
Special applications may require ducts fabricated of aluminum or stainless steel.
Standard duct is finished with industrial enamel applied after an SP-3 preparation. Access doors are installed to facilitate cleaning of the duct where size permits. Special configurations such as "diamond" duct are available when the need arises. Expansion joints are also available.