WebbDuct systems with pressure ratings in excess of 3 inches water column (747 Pa) shall be identified on the construction documents. Duct leakage shall not exceed the rate determined in accordance with Equation 6-3. F = C L P 0.65 (Equation 6-3) where: Upcodes Diagrams Related Code Sections 606.3.1 ENERGY CONSERVATION, EFFICIENCY AND CO Webbwith expansion bolts. Extend angles 3 inches beyond edge of opening. Provide the following angle sizes: Duct Size (inches) Angle Size (inches) Thru 36 1 1/4 by 1 1 /4 by …
standards for industrial duct construction - tandfonline.com
Webbclass that is upstream of the VAV boxes shall meet Seal Class C Interpretation: I interpret Section 6.4.4.2.1 to indicate that Seal Class A is the Applicable Static for Pressure Construction Class 3 inch wg and up. Seal Class C is the Applicable Static Pressure Construction for Class 2 inch wg. And in addition, any variable air volume system ... WebbSMACNA states if the designer does not designate pressure class for duct construc-tions on the contract drawings, the basis of compliance is as follows: 2-inch wg Table 1: … first place medallion
FIRE DAMPERS Understanding and Selection
WebbAllowable Leakage based on SMACNA Leakage Class SMACNA and NEBB recommend use of leakage class for specifying allowable leakage. To calculate allowable leakage, you … WebbAll duct and fittings are made per SMACNA’s duct Construction Standards (+10” W.G.). Spiral Seal Fittings are all 22 or 24 gauge. Spun Fittings are 20 gauge. • • CONSTRUCTION (GAUGE): The Spiral Seal System has been tested and meets the requirements of SMACNA’s Leakage Class 3. • PRESSURE CLASS All fittings are manufactured to slip ... Webb• Fire Resistance Rating - 1½ or 3 hours based on code requirements and building design (2015 International Building Code, section 717.3.2) • Leakage Rating - Class I, II, or III … first place lookout society