Duct Construction Standards

1 PROJECT LOCATIONENGINEERSUBMITTED BYDATECOPYRIGHT 1998 WARD INDUSTRIESDuct Construction StandardsForPositive & NegativeStatic PressuresAndSubmittal DataEngineering Specifications111 Riverview Drive Monessen, PA 15062 (724) 684-5500 1-800-466-9374 FAX (724) 684-8697 * Revised to be in compliance with SMACNA HVACDuct Construction Standards , 2nd ed., TO THE SHEET METAL INDUSTRY WARDINDUSTRIES DUCTCONSTRUCTIONSTANDARDS IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIR evision*7thForewordFor twelve years Ward Industries has pioneered the use of the four-bolt system for transverse ductconnection.

2 Ward Industries was one of the first to bring the four-bolt connector to the market andthrough engineering and innovation it has also been a leader in the years, Ward customers have successfully installed over 375 million feet of flange in thou-sands of installations. Examples of Ward products at work are shown L. Lawrence Convention Center Pittsburgh, PABecause of the Four Bolt Connection, the 20 wide sections of ductwork can be lifted into placewith a forklift. Using this method, more than 40 feet of the huge system can be installed per Service Buildings Memphis, TennesseeBuilding Complexes cover over 30 acres under one Miles of Ward H and J Flange InstalledTested at 9 Static PressureLess than 1% LeakageTEST RESULTSThe following tests of rectangular duct sections and transverse joints were conducted in accordance with Section VII of the SMACNA HVAC duct Construction Standards , 2nd ed.

3 , copies of these tests are available upon INDUSTRIES WILL PERFORM ANY ADDITIONAL TESTING THAT ANY ENGINEER,ARCHITECT, AUTHORITY, OWNER OR CONTRACTOR WOULD DEEM ReinforcementT=Conduit Type Tie Rods*=These tests were done as comparative tests, and the actual duct deflection was not recorded. They did not exceed SMACNA Deflection : Two (2) Tie Rods equally spaced (28 Centerline) were usedOPERATINGPRESSUREDUCT SIZESECTIONLENGTHDUCTGAUGECONNECTORTYPEC ONNECTORDEFLECTIONDUCT DEFLECTION1 1 1 1 1 1 2 2 2 2 2 2 2 see note3 3 3 3 3 3 4 4 4 4 4 4 5 5 5 6 6 6 6 10 10 10 10 72/1248/1260/2184/1296/1284/2160/2184/12 72/1272/1248/1284/3684/2148/1272/1260/12 76/4460/1560/2172/1248/1248/1260/1276/44 60/2148/1248/1260/1260/1248/1248/1260/12 42/12108/58120/4242/2460 60 60 60 R60 60 T60 T48 60 R60 60 60 R60 T60 60 R60 60 R60 60 T60 R60 R60 60 60 R60 T60 R60 60 48 R60 R60 60 48 60 R48 R60 R18

4 *. *. <.750*. *.730<.750<. DuctDeflection Limits(As taken from the SMACNAHVAC duct ConstructionStandards, 2nd ed., 1995.) duct WallW=12 or lessW=13 to 18 W=19 to 24 W=25 to 84 W=85 to 120 Tolerance of +10%Joints & ReinforcementsW=48 or lessW=49 to 120 Tolerance of 1/2 5/8 3/4 1 Limit1/4 W/2001 WARD INDUSTRIES SYSTEMS ARE ..AN ENERGY SAVING duct REINFORCEMENT CONNECTIONTHE THREE WARD INDUSTRIES SYSTEMS ..provide an innovative means of joining two sections of sheet metal ductwork and provide a stronger, tighter leakproof duct connection which.

5 Lower the cost of the sheet metal installation and provide a significant savings in operating INDUSTRIES COMPONENTSR ecommended for 26 ga. through and including 14 ga. ductworkJ SYSTEMR ollformed from 20 Ga. Galvanized CornerE SYSTEMR ollformed from 26 Corners Neededpatent#5450879H SYSTEMR ollformed from 22 Ga. Galvanized CornerLarge sealant pocket on all three flange systemsSEALANTF lame Spread - 5 Smoke Density - 0 Fuel Contribution - 0 Life Expectancy - 20 year minimumWARD INDUSTRIES METAL CLEAT Available in both 6 pieces and 10 lengths Suitable for driving in tight installations Also available in PVCWARD INDUSTRIES GASKETA vailable in Butyl and Closed Cell NeopreneBUTYL GASKETF lame Spread - 20 Fuel Contribution - 0 Smoke Density - 0 Thickness - 3/16 Life Expectancy - 20 yr.

6 Point - 300 FCompression set - noneNEOPRENE GASKETF lame Spread - 10 Fuel Contribution - 0 Smoke Density - 0 Thickness - 5/16 Unlimited Shelf LifeRoll formed from20 ga. galvanized steelJ CORNER11 ga. galvanized steelH CORNER11 ga. galvanized steel231/2 or STANDARDSRECTANGULAR duct REINFORCEMENTM inimum Rigidity Class* - Minimum Gage DuctReinforcement Spacing26 dn27-30 31-36 37-42 43-48 49-54 55-60 61-72 73-84 85-96 97-108 109-120 8 E-26E-26E-24E-24E-22H-20H-20H-18J-16J-16 6 E-26E-26E-26E-24E-24H-22H-22H-20H-18J-18 J22TJ22TJ22T5 E-26E-26E-26E-26E-26E-26E-24H-22 J26TH-22 J26TH-20 J22J-18 J22TJ22T4 E-26E-26E-26E-26E-26E-26E-24H-24H-24H-22 J-18 J22TJ22T3 E-26E-26E-26E-26E-26E-26E-26H-24H-24H-22 H-18 J-22J-18 J22T2 1/2

7 E-26E-26E-26E-26E-26E-26E-26H-24H-24H-22 H-18 J-22H-18 J-222 E-26E-26E-26E-26E-26E-26E-26H-24H-24H-22 H-18 J22H-18 J22 When referring to Table 1-3 thru Table 1-10 in the SMACNA HVAC duct ConstructionStandards, 2nd ed., 1995,Use the Ward E Angle on Rigidity Class E and below;Use the Ward H Angle on Rigidty Class F , G and H Use the Ward J Angle on Rigidity Classes above H The tables as shown herein are the SMACNA Tables with those interpretations already conducting Joint Performance Testing as described in Section VII of the SMACNA HVACDuct Construction Standards , 2nd ed.

8 , 1995,it was found that in some tests, the Ward Angles(E,H and J) permitted a more liberal interpretation of the SMACNA tests results are shown as follows:SMACNA TableVariationpermitted percertified is understood that some awarding authorities might not permit the variation even though its acceptance is described inthe SMACNA HVAC duct Construction Standards , 2nd ed., 1995,and therefore both options have been shown. The resultsof these certified tests which permit the variation are shown on the back page of this manual.

9 Also, both options have beenshown, so as to provide this manual as a quick reference to SMACNA 4 bolt manufacturers have prepared duct Construction Standards , but Ward Industries is the only manufacturer that is in full compliance with the SMACNA HVAC duct Construction Standards 2nd ed. in so much as they have had all of their flanges tested in accordance with Chapter 7, and also have certified tests from an outside independent testinglaboratory (Pittsburgh Testing Laboratories) for all the optional variations from the SMACNA HVAC duct ConstructionStandards 2nd ed.

10 As or STANDARDSRECTANGULAR duct REINFORCEMENTM inimum Rigidity Class* - Minimum Gage DuctReinforcement Spacing14 dn15-20 21-24 25-30 31-36 37-42 43-48 49-54 55-60 61-72 73-84 85-96 97-108 109-120 8 E-26E-26E-24E-24E-22H-20H-18H-18H-186 E-26E-26E-26E-26E-24E-22H-20H-20H-20H-18 J-165 E-26E-26E-26E-26E-24 H-26E-24 H-26H-22 H-26H-22 J26H-22 J26H-18 JJJJJ-18 J24TJ-16 J-20J22TJ22T4 E-26E-26E-26E-26E-26E-26H-26H-24 J-26H-24 J-26H-22 J26TJ-20 J22J-18 J-20J-18 J22TJ22T3 E-26E-26E-26E-26E-26E-26E-26E-24 J-26H-24 J-26H-24 J26TH-22 J22J-20 J22J-18 J22TJ-18 J22T2 1/2 E-26E-26E-26E-26E-26E-26E-26E-24 J-26E-24 J-26H-24 J-26H-22 J-24H-20 J-22J-18 J-22J-18 J-222 E-26E-26E-26E-26E-26E-26E-26E-24 J-26E-24 J-26H-24 J-26H-22 J-24H-22J-18 J-22J-18 J-22* Each duct system shall be constructed for the specific duct pressure classifications shown on the con-tract drawings for the project.