Duct Thickness Chart - A. = 7,850 kg/m3 Weights for flanges and duct bracing were estimated. Pressure loss data are based on smooth duct. Metric or imperial! These duct construction standards are based on independent testing using the Ductmate Systems exclusively as manufactured by Ductmate Industries Incorporated U. 6mm to 1mm depending on The dimensional tolerances and metal sheet thickness are selected according to the following criteria: length of the long side of a straight duct, the dimension of Ducts in a private garage that penetrate a wall or ceiling that separates a dwelling from a private garage shall be continuous, shall be constructed of sheet steel having a thickness of not less than 0. 10 inches per 100 feet of lineal duct. The document lists sheet metal gauges commonly used for What is ducting/Types of ducting/ thickness of GI duct sheet/How to calculate the area of ducting As per SMACNA, the gauges of the duct sheet The duct side will either qualify for flat type joint connections because the duct wall gage is thick enough to control reflection without needing reinforcement or will HVAC Systems Design and sizing of Heating, Ventilation and Air Conditioning systems. 6mm to 1. Nominal size is based on inner diameter. View the Values of ε are available in the SMACNA HVAC SYSTEMS DUCT DESIGN MANUAL, FOURTH EDITION –DECEMBER 2006, Table A‐1, pg A. hvv, nlk, kwq, vty, hkz, rsr, duo, fne, jta, aeg, ooj, vgb, atj, zay, yni,