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SINGLE WALL RECTANGULARRectangle Duct and Fittings Construction StandardsPositive and Negative PressureGauge selection for galvanized steel (ASTM A653), paint grip steel, type 304 stainless steel, and poly coatedsteel (PCS/PVC). Adjustments must be made for the use of 3003 aluminum. Standard seams are Pittsburghlock, type L-1, for both pipe and fittings. All seams are factory sealed.Legend: Corken Steel offers two types of intermediate reinforcement for rectangular ductwork: externalreinforcement and mid panel tie rods. Tie rods at the duct joints will be provided where required in addition tothe intermediate reinforcement. Two construction tables for each pressure class are provided, correspondingto each reinforcement method.EXTERIOR REINFORCEMENTMaximum DuctDimension0 to 89 to 1011 to 1213 to 1415 to 1617 to 1819 to 2021 to 2223 to 2425 to 2627 to 2829 to 3031 to 3637 to 4243 to 4849 to 5455 to 6061 to 7273 to 8485 to 9697 to 108109 to DCTDCTDCTDCTDCTDCTDCTDCTDCTDCTDCMID PANEL TIE ROD REINFORCEMENTJoint TieRods 11122CenterRein. ein. TieRods /RN/R1122Maximum DuctDimension0 to 89 to 1011 to 1213 to 1415 to 1617 to 1819 to 2021 to 2223 to 2425 to 2627 to 2829 to 3031 to 3637 to 4243 to 4849 to 5455 to 6061 to 7273 to 8485 to 9697 to 108109 to DCTDCTDCTDCTDCTDCTDCTDCTDCTDCTDCJoint Tie Mid PanelRods # Tie 1112EXT2EXTFS/D Flat Slip (T-6) and Drive (T-1)SS/D Standing Slip (T-10) and Drive (T-1)TDC 4 Bolt Connection (T-25b)N/R Not RequiredEXT Use External ReinforcementCorken Steel will fabricate to any specified construction or shop standard. Please see page 6 for available seams and connections.MATERIAL AND GAUGE AVAILABILITYGalvanized SteelPaint Grip Steel26 to 16 gauge26 to 16 gaugeMaterial sold as Paint Grip is not “ready to paint” – It will require cleaning.304 Stainless24 and 22 gaugePCS/PVC24 gaugeAluminum.032, .040, .063, .080, .090PCS/PVC is not recommended for use in high visibility applications.Carbon Steel16 gaugeALUMINUM (3003) DUCT THICKNESSADJUSTMENTSSteel Gauge Aluminum "14.109"
SINGLE WALL RECTANGULARRectangle Duct and Fittings Construction Standard1/2" WG – 5ft. Duct Gauge and Reinforcement Selection Maximum Drive: 18"EXTERIOR REINFORCEMENTMaximum DuctDimension0 to 89 to 1011 to 1213 to 1415 to 1617 to 1819 to 2021 to 2223 to 2425 to 2627 to 2829 to 3031 to 3637 to 4243 to 4849 to 5455 to 6061 to 7273 to 8485 to 9697 to 108109 to DCTDCTDCTDCTDCTDCTDCTDCTDCTDCTDCMID PANEL TIE ROD REINFORCEMENTJoint TieRods 111CenterRein. ein. TieRods /RN/RN/RN/RN/RN/RMaximum DuctDimension0 to 89 to 1011 to 1213 to 1415 to 1617 to 1819 to 2021 to 2223 to 2425 to 2627 to 2829 to 3031 to 3637 to 4243 to 4849 to 5455 to 6061 to 7273 to 8485 to 9697 to 108109 to DCTDCTDCTDCTDCTDCTDCTDCTDCTDCTDCJoint Tie Mid PanelRods # Tie /R1N/R1N/R1N/R1N/REXTN/REXT1" WG – 5ft. Duct Gauge and Reinforcement Selection Maximum Drive: 18"EXTERIOR REINFORCEMENTMaximum DuctDimension0 to 89 to 1011 to 1213 to 1415 to 1617 to 1819 to 2021 to 2223 to 2425 to 2627 to 2829 to 3031 to 3637 to 4243 to 4849 to 5455 to 6061 to 7273 to 8485 to 9697 to 108109 to DCTDCTDCTDCTDCTDCTDCTDCTDCTDCTDCMID PANEL TIE ROD REINFORCEMENTJoint TieRods /RN/R1122CenterRein. 11111Rein. TieRods /RN/RN/RN/R22Maximum DuctDimension0 to 89 to 1011 to 1213 to 1415 to 1617 to 1819 to 2021 to 2223 to 2425 to 2627 to 2829 to 3031 to 3637 to 4243 to 4849 to 5455 to 6061 to 7273 to 8485 to 9697 to 108109 to DCTDCTDCTDCTDCTDCTDCTDCTDCTDCTDCJoint Tie Mid PanelRods # Tie RN/R1N/R212122EXT2EXT
SINGLE WALL RECTANGULARRectangle Duct and Fittings Construction Standard2" WG – 5ft. Duct Gauge and Reinforcement Selection Maximum Drive: 18"EXTERIOR REINFORCEMENTMaximum DuctDimension0 to 89 to 1011 to 1213 to 1415 to 1617 to 1819 to 2021 to 2223 to 2425 to 2627 to 2829 to 3031 to 3637 to 4243 to 4849 to 5455 to 6061 to 7273 to 8485 to 9697 to 108109 to DCTDCTDCTDCTDCTDCTDCTDCTDCTDCTDCMID PANEL TIE ROD REINFORCEMENTJoint TieRods 11122CenterRein. ein. TieRods /RN/R1122Maximum DuctDimension0 to 89 to 1011 to 1213 to 1415 to 1617 to 1819 to 2021 to 2223 to 2425 to 2627 to 2829 to 3031 to 3637 to 4243 to 4849 to 5455 to 6061 to 7273 to 8485 to 9697 to 108109 to DCTDCTDCTDCTDCTDCTDCTDCTDCTDCTDCJoint Tie Mid PanelRods # Tie 2122EXT2EXT3" WG – 5ft. Duct Gauge and Reinforcement Selection Maximum Drive: 18"EXTERIOR REINFORCEMENTMaximum DuctDimension0 to 89 to 1011 to 1213 to 1415 to 1617 to 1819 to 2021 to 2223 to 2425 to 2627 to 2829 to 3031 to 3637 to 4243 to 4849 to 5455 to 6061 to 7273 to 8485 to 9697 to 108109 to CTDCTDCTDCTDCTDCTDCTDCMID PANEL TIE ROD REINFORCEMENTJoint TieRods 2CenterRein. n. TieRods /R11122Maximum DuctDimension0 to 89 to 1011 to 1213 to 1415 to 1617 to 1819 to 2021 to 2223 to 2425 to 2627 to 2829 to 3031 to 3637 to 4243 to 4849 to 5455 to 6061 to 7273 to 8485 to 9697 to 108109 to CTDCTDCTDCTDCTDCTDCTDCJoint Tie Mid PanelRods # Tie T2EXT
SINGLE WALL RECTANGULARRectangle Duct and Fittings Construction Standard4" WG – 5ft. Duct Gauge and Reinforcement Selection Maximum Drive: 18"EXTERIOR REINFORCEMENTMaximum DuctDimension0 to 89 to 1011 to 1213 to 1415 to 1617 to 1819 to 2021 to 2223 to 2425 to 2627 to 2829 to 3031 to 3637 to 4243 to 4849 to 5455 to 6061 to 7273 to 8485 to 9697 to 108109 to CTDCTDCTDCTDCTDCTDCTDCMID PANEL TIE ROD REINFORCEMENTJoint TieRods enterRein. #N/RN/RN/RN/RN/RN/RN/RN/RN/RN/RN/R11111111111Rein. TieRods 11122Maximum DuctDimension0 to 89 to 1011 to 1213 to 1415 to 1617 to 1819 to 2021 to 2223 to 2425 to 2627 to 2829 to 3031 to 3637 to 4243 to 4849 to 5455 to 6061 to 7273 to 8485 to 9697 to 108109 to CTDCTDCTDCTDCTDCTDCTDCJoint Tie Mid PanelRods # Tie /R1N/R1N/R1N/R1N/REXTN/REXT6" WG – 5ft. Duct Gauge and Reinforcement Selection Maximum Drive: 18"EXTERIOR REINFORCEMENTMaximum DuctDimension0 to 89 to 1011 to 1213 to 1415 to 1617 to 1819 to 2021 to 2223 to 2425 to 2627 to 2829 to 3031 to 3637 to 4243 to 4849 to 5455 to 6061 to 7273 to 8485 to 9697 to 108109 to CTDCTDCTDCTDCTDCTDCTDCMID PANEL TIE ROD REINFORCEMENTJoint TieRods enterRein. #N/RN/RN/R1111111111111111111Rein. TieRods 2Maximum DuctDimension0 to 89 to 1011 to 1213 to 1415 to 1617 to 1819 to 2021 to 2223 to 2425 to 2627 to 2829 to 3031 to 3637 to 4243 to 4849 to 5455 to 6061 to 7273 to 8485 to 9697 to 108109 to CTDCTDCTDCTDCTDCTDCTDCJoint Tie Mid PanelRods # Tie /R1N/R1N/R1N/R1N/REXTN/REXT
SINGLE WALL RECTANGULARSeams & ConnectionsConnector Types1 5/8"T-1 Drive SlipT-6 Hemmed "S" SlipRIVET ORWELDT-10 Standing SH1 3/8"GASKETT-21 Weld FlangeT-22 Companion AnglesT-25b FlangedSeam Types (Fig. 1-5)L-1 PittsburghLockL-2 Button PunchSnap LockL-4 Standing SeamL-5 SingleCorner SeamCorner Weld
SINGLE WALL RECTANGULARReinforcementImmediate ReinforcementH REINFORCEMENT3 "/4. 5"Rollformed from 24 guageglavanized steel. Conforms toSMACNA “H” equivalent.XX. 25"XXX1.85"XX3 "/41. 5"X 8" Maximum fastener (tack weld, spotweld,bolt, screw, or rivet) spacing when ends are tied,the 3/4" interval may be omitted.XXXXWhen reinforcements occur at the same locationon adjacent sides at 4" WG (1000 Pa) static and over,tie the ends.For duct 4" WG, ends of reinforcement must be tied together.Tie RodsBoltPipe insert is frictionfitted with internalthreads.RubberWasherStamped galvanized discwith neoprene washersecures the ductwall.Light wall conduitDuctwall½" or ¾"Conduit1 3/ 8"Each duct section istied at both ends1"1"BoltAssemblyDuctwall
SINGLE WALL RECTANGULARLinerStock Liner½” - 2 lb. density liner1” - 1½ lb. density linerOther thicknesses and densities available upon request.Liner InstallationAir flowLapped and butted cornerDetail AMetal nosing channel or zeeVelocity 4,000 FPMor at fan dischargeAlternatefolded cornerDuct section(Typically 5 ft.)All tranverse edges to becoated with adhesive exceptwhen nosing is presentTechnical DataFire Resistance: Meets NFPA 90A amd NFPA 90B Standards for fire safety.Temperate Range: ASTM C 411. Up to 250 ( 121 C)Air Velocity: ASTM C 1071Maximum 6000 fpm (1829 mpm)Water Vapor Sorption: ASTM C 2204. Less than 3% by weight.Surface Burning Characteristics: UL/ULC Listed. When tested in accordance with ASTM E 84, UL 723, CAN 4-S102, and NFPA-255,Johns-Manville Linacoustic RC does not exceed: 25 Flame spread, 50 Smoke developed.Microbial Growth: ASTM C1338, G21, G22. The airstream surface mat facing is treated with an EPA registered antimicrobial agentto aid in the prevention of fungal and bacterial growth.
SINGLE WALL RECTANGULARVanesDual Vanes24 ga MIN.25 ga MIN.3 1/4"12 /4"212 /4"32 1/8"21 1/8"11 1 /8"11" R2 1/4" RR2" R4 1/4" RR45º 45º45º45ºSingle Vanes22 ga MIN.25 ga MIN.3 1/4"31 1/2"45º45º45º45º
SINGLE WALL RECTANGULARDuct & FittingsTDC ConnectionRecommended Clip Spacing60 in. Duct4 required48 in. Duct3 required36 in. Duct3 required24 in. Duct2 required18 in. Duct(and smaller)1 required6"9"TYP7"7"5"5"5"5"6"Straight DuctBeads@ 12"FinishedLengthWD6"55 ½" – Finished length with TDC59" – Finished length with drive cleat ends60" – Length with ends unfinished
SINGLE WALL RECTANGULARElbowsSquare Throat / Square Heel 90 ElbowSquare Throat / Radius Heel 90 ElbowWith or without vanesAºW2W2S1S1W1 x D1S2W1 x D1S2Square Throat / Square Heel ElbowRadius ElbowAºW2 x D2AºW2S2S1W1 x D1S2W1 x D1RS1
SINGLE WALL RECTANGULARTransitionsRadius Offset RightSquare Offset RightS2OW2OW2 x D2S2TUTDLW1 x D1LS1Radius Offset LeftW1 x D1S1Square Offset LeftS2W2OW2x D2OS2LTUTDLS1W1x D1S1W1 x D1
SINGLE WALL RECTANGULARTransitionsTransition Straight SidesTransition Offset LeftS2W2LS1W1 x D1S1Double Square ElbowS2TDLW1 x D1OW2 x D2Transition Offset RightWith or without vanesS1W1 x D1OOS2W2 x D2MLTDW2S2W1 x D1S1
SINGLE WALL RECTANGULARWyes & TeesRadius Wye BranchWyeS2W3W2 x D2W2 x D2S2S4W3 x D3W4 x D4LTD 1TD 2W1 x D1S1S1S1W1 x D1O2TD 3R1LTDO3R2S3ORadius TeeW2W3Square TeeWith or without vanesW1 x D1R1R2S2S1W2W3Radius BranchW2 x D2S2S1W1 x D1S3W3 x D3LTD 1TD 2W1 x D1RS1
SINGLE WALL RECTANGULARMiscellaneousSquare to RoundStraight TapAvailable in outside or inside collar lockO2O1LLTUTDW1 x D1W1 x D1Canvas / Flex ConnectorIncreased TapAºLW1 x D1W1 x D1
SINGLE WALL RECTANGULARFittingsSquare ThroatSquare Heel 90 ElbowSquare ThroatSquare Heel ElbowSquare ThroatRadius Heel ElbowRadius ElbowRadius OffsetRightRadius OffsetLeftSquare OffsetRightSquare OffsetLeftTransition Straight SidesDouble SquareElbowOffset LeftOffset RightRadius WyeBranchSquare TeeSquare to RoundWyeCanvas / FlexConnectorRadius TeeStraight TapRadius BranchIncreased Tap
Tie rods at the duct joints will be provided where required in addition to the intermediate reinforcement. Two construction tables for each pressure class are provided, corresponding to each reinforcement method. FS/D Flat Slip (T-6) and Drive (T-1) SS/D Standing Slip (T-10) and Drive (T-1) TDC 4 Bolt Connection (T-25b) N/R Not Required
