Smacna Duct Gauge Standards Pdf

Tdc cnt jnt condu loc tdc connector center of duct tdc connector.

Smacna duct gauge standards pdf.

Hvac duct construction standards metal and flexible third edition iii foreword this third edition of the smacna commercial metal and flexible duct construction standards is another in a long line dating from the 1950s. The 1980 edition of these standards was the first publication dealing with the selection of duct gauge and reinforcement for rectangular industrial duct systems. For all ducts between the supply fan and variable volume control boxes and 1 250 pa w g. Stainless steel 24 20 gauge a 240 304 or 316 48 check with factory for availability of 72 in 26 gauge galvanized note.

The smacna hvac duct construction standards 2nd ed 1995 and therefore both options have been shown. Disclaimer of warranties a the sheet metal and air conditioning contractor s national association smacna provides its product for informational. Also both options have been shown so as to provide this manual as a quick reference to smacna standards. A comprehensive duct layout indicating sizes design airflows pressure class and routing of the duct system.

If the designer does not designate pressure class for duct construction on the contract drawings the basis of compliance with the smacna hvac duct construction standards is as follows. Smacna testing and research institute verified that sheet metal connectors inc. The results of these certified tests which permit the variation are shown on the back page of this manual. The types of fittings to be used based on the designer s calculations of fitting losses i e square versus 45 entry taps conical versus straight taps etc.

For all other ducts of any application. Smacna cad standard second edition v notice to users of this publication 1. A comprehensive duct layout indicating sizes design airflows pressure class and routing of the duct system. Duct work to be sealed per smacna hvac table 1 2 5.

2 500 pa w g. A quick overview of the changes is provided in the front of this manual. Smacna standards and manuals address all facets of the sheet metal and hvac industry including duct construction and installation indoor air quality energy recovery roofing and architectural sheet metal welding and commissioning. Tdc duct constructed per smacna standards first edition 1995 2.

While the first edition served industry very well for many years technology has continued to evolve and in response to our membership s request smacna s rectangular industrial duct. Duct fabricated using pittsburg seams. Ansi the american national standards institute has accredited smacna as a standards setting organization. All duct stiffened by machine formed beads spaced at 12 o c.