Hvac Duct Construction Standards Pdf

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.

Hvac duct construction standards pdf.

This is the final session in a three part series. For all ducts between the supply fan and variable volume control boxes and 1 250 pa w g. 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. A comprehensive duct layout indicating sizes design airflows pressure class and routing of the duct system.

Duct construction reinforcement 20 9 1 duct sheet metal thickness 20 9 2 duct hanger spacing 21. Hvac duct construction standards metal and flexible. Ductwork design considerations 33. Event objectives gain solid understanding of how to construct duct in a resource efficient and sustainable manner that is compliant with smacna s hvac duct construction standard.

Smacna hvac duct construction standards metal and flexible third edition 2005. 2 500 pa w g. Duct size duct gauge joint length wide side connector narrow side connector 0 12 26 59 flat slip t 6 24 ga flat drive t 1 24 ga 13 18 26 59 standing slip t 11 26 ga flat drive t 1 24 ga 19 30 26 56 t d c. A quick overview of the changes is provided in the front of this manual.

T 25a 31 42 24 56 t d c. Information required for duct construction. A comprehensive duct layout indicating sizes design airflows pressure class and routing of the duct system. 10 9 standard duct sizes 32 11 0.

The types of fittings to be used based on the designer s calculations of fitting. Webinars hvac duct construction standards 103 round and oval duct hangers and casing construction. Most air conditioning and heating systems require some form of duct work to channel or direct the.