These duct construction standards are intended for use by contractors, fabricators and designers of air pollution control, pneumatic conveyance and industrial ventilation systems. Example: low and medium velocity duct system. The of these certified tests which permit the variation are shown on the back page of this manual. A comprehensive duct layout indicating sizes, design airflows, pressure class, and routing of the duct system.
Sheet metal gauges used in ductwork. Add standard and customized parametric components - like flange beams,.
Static Pressure Up to 2” W. These standards provide a simple three-step procedure for the selection of material gage, reinforcement systems, and connections, based on clearly defined design parameters. Other radii and vaned elbows are available as needed. Elbows through 12” shall be die forme with stitch welded joints. Standard elbows will have 1. CONSTRUCTION STANDARD _____ B. Fabricate duct fittings to match adjoining ducts, and to comply with duct requirements as applicable to fittings.
Vertical riser supports shall be installed at maximum spacing intervals of? A feet B feet C feet D feet 2.
A inch by inch rectangular duct with a 1. Fittings are assembled with stitch welds, spot welds, or standing seams and are sealed. This includes work with sheet metal, specialty stainless, kitchen equipment, manufacturing, management and maintenance. SPECIFICATIONS FOR SPIRAL PIPE AND FITTINGS.
As a result, it is expected that sealing and testing duct systems will play an increasingly significant role in commercial building construction and remodeling. SMACNA Guide To Duct Construction. GA, or lighter than GA. One of the significant changes from the third edition is the addition of information on spray and aerosolized duct sealants. Using this document as the basis of design would then require increase gauges for all ductwork less than inch diameter.
Duct Insulation and Sealing Requirements in Commercial Buildings (Continued) ASHRAE 90. Spiral Manufacturing Co. In addition to standard , we can custom fabricate rectangular ductwork for commercial and industrial applications according to your specifications. Fire, Smoke and Radiation Damper Installation Guide for HVAC Systems, 5th.
SHAPE Manufacturing, Inc. For example, if the gauge reads psig then, using the above equation, the absolute pressure would be 24. Ordinary heating, ventilating, and air conditioning duct systems read air pressures at 0.
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