Oval Duct And Fittings Construction Standards DUAL WALL OVAL DUCT AND .
Double Wall Oval Oval Duct and Fittings Construction Standards Air Distribution Corporation DUAL WALL OVAL DUCT AND FITTINGS CONSTRUCTION STANDARDS Outer Shell Positive Pressure Gauge selection for galvanized (ASTM A653). Fittings are manufactured with standing seam, welded seam, spot welded, or button punched locked construction. All Spiral Duct and Fittings are manufactured in accordance with applicable SMACNA, ASHRAE and SPIDA standards. FLAT OVAL CONSTRUCTION Major Dimension Duct Width Spiral Seam Duct Gauge Fitting Gauge to 24” 24 20 25 to 36” 22 20 37 to 48” 22 18 49 to 60” 20 18 61 to 70” 20 16 71” and up 18 16 Thickness/Weight Relationships of Standard Materials Galvanized Steel Gauge Nominal Thickness (inches) Nominal Weight (lb/sq ft) Stainless Steel (304 or 316) Nominal Thickness (inches) Nominal Weight (lb/sq ft) Aluminum 3003-H14 Nominal Thickness (inches) Nominal Weight (lb/sq ft) 26 0.0217 0.906 0.0188 0.788 0.025 0.356 24 0.0276 1.156 0.0250 1.050 0.032 0.456 22 0.0336 1.406 0.0313 1.313 0.040 0.570 20 0.0396 1.656 0.0375 1.575 0.050 0.713 18 0.0516 2.156 0.0500 2.100 0.063 0.898 16 0.0635 2.656 0.0625 2.625 0.080 1.140 Inner Shell Gauge selection for inner shell. Standard material for the inner shell of spiral pipe is perforated steel (ASTM A653), with 3/32” holdes on 3/16” staggered centers for a free area of 23%. Standard material for the inner shell of fittings is solid steel. Major Dimension Duct Dia. Inner Shell Fittings to 24” 24 24 25” - 36” 24 24 37” - 48” 24 24 49” - 60” 22 22 61” - 70” 22 20 71” and up 22 18 Standard Insulation is 1” thick, 1 pound per cubic foot density, with a thermal conductivity (ASTM C 518) @ 75 F mean temperature of 0.27 (BTU-in./hr.ft.2 F) Surface burning characteristics (ASTM E 84, UL 723) 25 flame spread 50 smoke developed 1
Double Wall Oval Air Distribution Corporation Dimensional Code & Ordering Information DIMENSIONING CODE All dimensions are in inches, all angles are in degrees A - Oval major B - Oval minor C - Branch oval major D - Branch oval minor R - Center Line Radius V - Body length of fitting H - See Loloss Tee ORDERING Specify type of fittings and list the following dimensions: ELBOWS - A, B, R TEES - A, B, E, F, L, (C, D, G, H, L2) LATERALS - A, B, E, F, L, (C, D, G, H, L2) CROSSES - A, B, E, F, L, G, H, (C, D, L2, L3 ) ACCESSORIES - As Noted All fittings, unless noted, are sized as a male part on each end for a slip joint assembly with spiral pipe. For flanged fittings see connectors detail for all dimensioning. 2
Double Wall Oval ELBOWS Air Distribution Corporation 90 5-PC ELBOW 45 3-PC ELBOW E905 E453 A xB AxB 2L 2L B Ax AxB R A 2L 2" 2" 90 2-PC MITRED ELBOW E290 / E290V No. of vanes 6-9 2 10-14 3 15-19 4 20-60 5 CUSTOM ELBOW XELB Ax B Ax B 2L AxB 2L AxB A 2" 2" R A 2L 2" 2" *SPECIFY (Elbow Angle & Radius of Centerline *Oval Duct Elbows are available in “Hard Bend” and “Easy Bend” as defined by the following diagrams and abbreviations. Hard Bend (HB) Easy Bend (EB) 3
Double Wall Oval STRAIGHT TEES Air Distribution Corporation REDUCING TEE STRAIGHT TEE TR T L A-B 4” MINIMUM ExF 2L ExF ExF 2L ExF 2" 4” 2" 2” 3” AxB 2L 3” AxB L 2" 2" 2" CxD AxB 2" TEE CROSS TXR TRX ExF ExF 2" 2" 4” 4” 3” AxB 2L 3” L 2" AxB 3” CxD 2L 3” AxB L A-B 4” MINIMUM ExF 2L ExF 2L AxB 2L L2 L 2" REDUCING TEE CROSS TX CxD L L2 2" GxH GxH GxH 2L GxH 2L C D 3” CxD 2L AxB 2L 3” C D 4
Double Wall Oval CONICAL TEES Air Distribution Corporation REDUCING CONICAL TEE CONICAL TEE TCR TC L A-B 4” MINIMUM ExF 2L ExF ExF 2L ExF 2" 2" 3” 2" 1" 5" 1" 5" AxB 2L AxB 2L 3” AxB L 2" 3” 3” CxD TXCR ExF 2L ExF 2" 2" 3” 1" 5" 1" 3” 3” A 2L 1" 1" 3” 3” AxB C D L2 5" 2" 2" GxH GxH 2L CxD L 2" 5" 2" 2" CxD 2L L AxB L A-B 4” MINIMUM ExF 2L ExF 3” AxB 2L L2 L 2" REDUCING CONICAL TEE CROSS TXC 5" 2" 2" AxB 2" CONICAL TEE CROSS 1" CxD 2L 3” 1" 2" 2" C D GxH GxH 2L 5
Double Wall Oval STRAIGHT LATERAL Air Distribution Corporation 45 REDUCING LATERAL 45 LATERAL LR 2" Ex F Ex F 2L 4” 4” 4” 4” AxB 2L AxB L2 L 45 REDUCING LATERAL CROSS LXR LX Ex F 2" Ex F 2L 4” 2L 2" 2" 4” AxB 2L 4” L AxB 2" 4” CxD L 2" 4” 2" G GxH xH 2L 2" 4” 4” AxB 4” Ex F CxD 2L AxB 2L 2" Ex F L2 G GxH xH 2L 45º CxD 2" 45 LATERAL CROSS LX AxB 2" L 4” 2" 2" 2" 2" CxD 2L AxB 2L 4” Ex F Ex 2L F 2" L 6
Double Wall Oval LOLOSS TEES Air Distribution Corporation LOLOSS TEE REDUCING LOLOSS TEE TL TLR ExF 2L ExF 2" ExF 2L 3” H 2" 3” 3” ExF 2" 2” 2" H AxB 2L 2" 3” L2 2" 2" CxD 2L AxB 2L AxB 3” AxB CxD L E H 3 thru 8 4” L E H 3 thru 8 4” 9 thru 16 6” 9 thru 16 6” 17 thru 26 10” 17 thru 26 10” 27 and up 12” 27 and up 12” LOLOSS TEE CROSS REDUCING LOLOSS TEE CROSS TLX TLXR ExF 2L ExF 2L ExF ExF 2" 2" 2" 2" H L 3” 2" 2" CxD 2L AxB AxB H 2" 2" 3” 2" AxB 2L 2" AxB 2L 2" CxD L L2 H H E, G H 3 thru 8 4” 9 thru 16 6” 17 thru 26 10” 27 and up 12” 2" 2" D 2L 2" GxH GxH 2L C D E, G H 3 thru 8 4” 9 thru 16 6” 17 thru 26 10” 27 and up 12” 2" GxH GxH 2L C D 7
Double Wall Oval MISCELLANEOUS Air Distribution Corporation CONCENTRIC REDUCER ECCENTRIC REDUCER R RE 2" 2" 3” L L 3” 3” 2" E TO ROUND CxD END CAP RECTANGULAR TO OVAL RTR AxB 2L CxD AxB CxD 2L AxB CxD 2L AxB 2L 3” 2" EC AxB RSQ 2" 2" 3” AxB 2L L 2" CXD (C 2L) X (D 2L) RECTANGL 8
Double Wall Oval MISCELLANEOUS Air Distribution Corporation OFFSET V STANDARD 2XA Z º OFFSET ROUND TO ROUND CxD 2L ZR CxD AxB 2L L Z L 3” 2” AxB TD Z AxB AxB 2L TAPERED Y BRANCH YR 2" 2" 2" 2L F Ex ExF 3” YR 3” 2" 2L F Ex xF E 3” Cx D Cx 2 D L Y 3” Y Y BRANCH Cx D Cx 2L D 3” 2" 3” 2" AxB AxB AxB 2L AxB 2L BULLHEAD TEE TBV 2" A No. of vanes 3-7 8-10 10-60 1 3 5 REDUCING BULLHEAD TEE TBVR 2" L L L1 A No. of vanes 3-7 8-10 10-60 1 3 5 L2 D C 6" 6" 4” 4” 6" 6" 2" 3” 2" 4” 4” D 2L C 2L Y 3” 2" 2" AxB AxB 2L L1 A - C 4” MINIMUM AxB AxB 2L L2 A - D 4” MINIMUM 9
Double Wall Oval Construction Chart Air Distribution Corporation ACTUAL SPIRAL PIPE OVAL SIZES & CONSTRUCTION CHART Nominal Oval Size Galv Spiral Duct Ga. Galv. Fitting Ga. 6 x 17 24 20 19 24 20 20 24 20 22 24 23 24 25 28 Weight lb/ft Actual Size Nominal Oval Size Galv Spiral Duct Ga. Galv. Fitting Ga. Weight lb/ft Actual Size 4.5 17.11 10 x 16 24 20 4.57 16.43 4.57 18.76 18 24 20 4.80 18.05 4.80 20.33 19 24 20 5.26 19.62 20 5.26 21.90 21 24 20 5.45 21.19 20 5.45 23.47 23 24 20 5.87 22.76 22 20 7.16 25.05 26 22 20 8.00 26.02 22 20 8.00 28.30 29 22 20 8.85 29.16 31 22 20 8.85 31.45 32 22 20 9.62 32.30 34 22 20 9.62 34.59 35 22 20 10.41 35.45 37 22 18 10.81 37.73 38 22 18 11.30 38.59 41 22 18 11.3 40.87 41 22 18 12.00 41.81 44 22 18 12.00 44.09 45 22 18 12.81 44.95 47 22 18 12.81 47.23 48 22 18 13.58 48.09 50 20 18 16.15 50.37 51 20 18 17.10 51.23 53 20 18 17.10 53.52 54 20 18 18.05 54.37 56 20 18 18.05 56.66 57 20 18 18.92 57.52 59 20 18 18.92 59.60 60 20 18 19.95 60.66 63 20 16 19.95 62.94 63 20 16 20.90 63.80 66 20 16 20.90 66.08 67 20 16 21.85 66.94 69 20 16 21.85 69.22 70 20 16 22.79 70.08 72 18 16 29.09 72.36 73 18 16 30.46 73.22 75 18 16 30.46 75.51 76 18 16 31.53 76.36 8 x 16 24 20 4.5 15.96 79 18 16 32.77 79.51 17 24 20 4.57 17.62 12 x 17 24 20 4.8 16.91 19 24 20 4.80 19.19 18 24 20 5.26 18.48 21 24 20 5.26 20.76 20 24 20 5.45 20.05 22 24 20 5.45 22.33 21 24 20 5.87 21.62 24 24 20 5.87 23.90 25 22 20 8.00 24.88 27 22 20 8.00 27.16 28 22 20 8.85 28.02 30 22 20 8.85 30.30 31 22 20 9.62 31.16 33 22 20 9.62 33.25 34 22 20 10.41 34.30 36 22 20 10.41 36.59 37 22 18 11.30 37.45 39 22 18 11.3 39.73 40 22 18 12.00 40.67 43 22 18 12.00 42.95 43 22 18 12.81 43.81 46 22 18 12.81 46.09 47 22 18 13.58 46.95 49 20 18 16.15 49.23 50 20 18 17.10 50.09 52 20 18 17.10 52.37 53 20 18 18.05 53.23 55 20 18 18.05 55.52 56 20 18 18.92 56.37 58 20 18 18.92 58.66 59 20 18 19.95 59.52 61 20 16 19.95 61.80 62 20 16 20.90 62.66 65 20 16 20.90 64.94 65 20 16 21.85 65.80 68 20 16 21.85 68.08 69 20 16 22.79 68.94 71 18 16 29.09 71.22 72 18 16 30.46 72.08 74 18 16 30.46 74.36 75 18 16 31.53 75.22 77 18 16 31.53 77.51 78 18 16 32.77 78.36 10
Double Wall Oval Construction Chart Air Distribution Corporation ACTUAL SPIRAL PIPE OVAL SIZES & CONSTRUCTION CHART Nominal Oval Size Galv Spiral Duct Ga. Galv. Fitting Ga. Weight lb/ft Actual Size Nominal Oval Size Galv Spiral Duct Ga. Galv. Fitting Ga. Weight lb/ft Actual Size 14 x 19 24 20 5.45 18.91 18 x 24 24 20 8.85 24.60 20 24 30 5.87 20.48 27 22 20 9.62 27.74 23 24 20 8.00 23.74 31 22 20 10.41 30.88 27 22 20 8.85 26.88 34 22 20 11.30 34.02 30 22 20 9.62 30.02 37 22 18 12.00 37.24 33 22 20 10.41 33.16 40 22 18 12.81 40.38 36 22 20 11.30 36.30 43 22 18 13.58 43.52 39 22 18 12.00 39.52 46 22 18 14.20 46.67 42 22 18 12.81 42.67 49 20 18 18.05 49.81 45 22 18 13.58 45.81 53 20 18 18.92 52.95 49 20 18 17.10 48.95 56 20 18 19.95 56.09 52 20 18 18.05 52.09 59 20 18 20.90 59.23 55 20 18 18.92 55.23 62 20 16 21.85 62.37 58 20 18 9.90 58.37 65 20 16 22.79 65.52 61 20 16 20.90 61.52 68 20 16 23.80 68.66 64 20 16 21.85 64.66 72 18 16 31.53 71.80 67 20 16 22.79 67.80 75 18 16 32.77 74.94 71 18 16 30.46 70.94 78 18 16 34.00 78.08 74 18 16 31.53 74.08 22 20 9.23 24.60 77 18 16 32.77 77.22 29 22 20 10.41 29.74 80 18 16 34.00 80.36 33 22 20 11.30 32.88 16 x 22 24 20 8.00 22.60 36 22 20 12.00 36.10 25 22 20 8.85 25.74 39 22 18 12.81 39.24 29 22 20 9.62 28.88 42 22 18 13.58 42.38 32 22 20 10.41 32.02 45 22 18 14.20 45.52 35 22 20 11.30 35.16 48 22 18 15.18 48.67 38 22 18 12.00 38.38 51 20 18 18.92 51.81 41 22 18 12.81 41.52 55 20 18 19.95 54.95 44 22 18 13.58 44.67 58 20 18 20.90 58.09 47 22 18 14.20 47.81 61 20 16 21.85 61.23 51 20 18 18.05 50.95 64 20 16 22.79 64.37 54 20 18 18.92 54.09 67 20 16 23.80 67.52 57 20 18 19.95 57.23 70 18 16 31.53 70.66 60 20 18 20.90 60.37 73 18 16 32.77 73.80 63 20 16 21.85 63.52 77 18 16 34.00 76.94 66 20 16 22.79 66.66 80 18 16 35.12 80.08 69 20 16 23.80 69.80 73 18 16 31.53 72.94 76 18 16 32.77 76.08 79 18 16 34.00 79.22 20 x 26 11
Double Wall Oval Reinforcement Chart Air Distribution Corporation OVAL REINFORCEMENT CHART Spiral Duct Nominal Oval Size 6 x 19 Galv Ga. 24 Spiral Duct Static Pressure (in w.g.) 0.5 1 2 4 6 10 Nominal Oval Size nr nr 8a 5a 4a 3a 8 x 74 Galv Ga. Static Pressure (in w.g.) 0.5 1 2 4 6 10 18 8b 6b 4b 3b 2.5b 2c 20 24 nr nr 8a 5a 4a 3a 77 18 8b 6b 4b 3b 2.5b 2c 22 24 nr 10a 8a 5a 4a 3a 10 x 18 24 nr nr nr nr nr 5a 25 22 nr 10a 8a 6a 5a 3a 19 24 nr nr nr 6a 5a 4a 28 22 nr 10a 8a 5a 5a 3a 23 24 nr nr 8a 5a 4a 3a 31 22 10a 10a 8a 5a 4a 3a 26 22 nr nr 10a 6a 5a 4a 34 22 10a 10a 6a 5a 4a 3b 29 22 nr 10a 8a 6a 5a 3a 37 22 10a 8a 5a 4a 3b 2.5b 32 22 nr 10a 8a 5a 5a 3a 41 22 10a 8a 5a a 3b 2.5b 35 22 10a 10a 8a 5a 4a 3a 44 22 8a 6a 4a 3a 2.5b 2b 38 22 10a 10a 6a 5a 4a 3b 47 22 8a 6a 4a 3a 2.5b 2b 41 22 10a 8a 5a 4a 3b 2.5b 50 20 10a 6a 5b 3b 2.5b 2b 45 22 10a 8a 5a 4a 3b 2.5b 53 20 10a 6a 5b 3b 2.5b 2b 48 22 8a 6a 4a 3a 2.5b 2b 56 20 8a 6a 4b 3b 2.5b 2b 51 20 10a 8a 5a 4b 3b 2.5b 59 20 8a 6a 4b 3b 2.5b 2b 54 20 10a 6a 5b 3b 2.5b 2b 63 20 8a 6a 3b 3b 2.5b 2b 57 20 10a 6a 5b 3b 2.5b 2b 66 20 8a 6a 3b 3b 2.5b 2b 60 20 8a 6a 4b 3b 2.5b 2b 69 20 6a 4b 3b 2.5b 2b x 63 20 8a 6a 4b 3b 2.5b 2b 72 18 8b 6b 4b 3b 2.5b 2c 67 20 8a 6a 3b 3b 2.5b 2b 75 18 8b 6b 4b 3b 2.5b 2c 70 20 8a 6a 3b 3b 2.5b 2b 8 x 17 24 nr nr nr 6a 5a 4a 73 18 8b 6b 4b 3b 2.5b 2c 19 24 nr nr nr 6a 5a 4a 76 18 8b 6b 4b 3b 2.5b 2c 21 24 nr nr 8a 5a 4a 3a 79 18 8b 6b 4b 3b 2.5b 2c 24 24 nr 10a 8a 5a 4a 3a 12 x 18 24 nr nr nr nr nr 5a 27 22 nr 10a 8a 6a 5a 3a 21 24 nr nr nr 6a 5a 4a 30 22 nr 10a 8a 5a 5a 3a 25 22 nr nr nr 8a 5a 4a 33 22 10a 10a 8a 5a 4a 3a 28 22 nr nr 10a 6a 5a 4a 36 22 10a 10a 6a 5a 4a 3b 31 22 nr 10a 8a 6a 5a 3a 39 22 10a 8a 5a 4a 3b 2.5b 34 22 nr 10a 8a 5a 5a 3a 43 22 10a 8a 5a 4a 3b 2.5b 37 22 10a 10a 8a 5a 4a 3a 46 22 8a 6a 4a 3a 2.5b 2b 40 22 10a 10a 6a 5a 4a 3b 49 20 10a 8a 5a 4b 3b 2.5b 43 22 10a 8a 5a 4a 3b 2.5b 52 20 10a 6a 5b 3b 2.5b 2b 47 22 10a 8a 5a 4a 3b 2.5b 55 20 10a 6a 5b 3b 2.5b 2b 50 20 10a 8a 5a 4b 3b 2.5b 58 20 8a 6a 4b 3b 2.5b 2b 53 20 10a 8a 5a 4b 3b 2.5b 61 20 8a 6a 4b 3b 2.5b 2b 56 20 10a 6a 5a 3b 2.5b 2b 65 20 8a 6a 3b 3b 2.5b 2b 59 20 10a 6a 5b 3b 2.5b 2b 68 20 8a 6a 3b 3b 2.5b 2b 62 20 8a 6a 4b 3b 2.5b 2b 71 18 8b 6b 4b 3b 2.5b 2c 65 20 8a 6a 4b 3b 2.5b 2b Example: 8a 8 distance in feet between angle a letter indicates size of angle a 1 1/2” x 1 1/2 “ x 1/8” b 2” x 2” x 3/16” c 2 1/2” x 2 1/2” x 1/4” nr no reinforcement required 12
Double Wall Oval Reinforcement Chart Air Distribution Corporation OVAL REINFORCEMENT CHART Spiral Duct Nominal Oval Size Galv Ga. 12 x 69 Spiral Duct Static Pressure (in w.g.) 0.5 1 2 4 6 10 Nominal Oval Size Galv Ga. 20 8a 6a 3b 3b 2.5b 2b 16 x 73 Static Pressure (in w.g.) 0.5 1 2 4 6 10 18 10a 8b 5b 3b 3b 2b 2b 72 18 10a 8b 5b 3b 3b 2b 76 18 10a 6b 5b 3b 3b 75 18 8b 6b 4b 3b 2.5b 2c 79 18 8b 6b 4b 3b 2.5b 2c 78 18 8b 6b 4b 3b 2.5b 2c 18 x 24 24 nr nr nr nr nr 5a 14 x 20 24 nr nr nr nr nr 5a 27 22 nr nr nr nr 6a 5a 23 24 nr nr nr 6a 5a 4a 31 22 nr nr nr 8a 5a 4a 27 22 nr nr nr 8a 5a 4a 34 22 nr nr 10a 6a 5a 4a 30 22 nr nr 10a 6a 5a 4a 37 22 nr 10a 8a 6a 5a 3a 33 22 nr 10a 8a 6a 5a 3a 40 22 nr 10a 8a 5a 5a 3a 36 22 nr 10a 8a 5a 5a 3a 43 22 10a 10a 8a 5a 4a 3a 39 22 10a 10a 8a 5a 4a 3a 46 22 10a 10a 6a 5a 4a 3b 42 22 10a 10a 6a 5a 4a 3b 49 20 10a 10a 6a 5b 4b 3b 45 22 10a 8a 5a 4a 3b 2.5b 53 20 10a 10a 6a 5b 4b 3b 49 20 10a 10a 6a 5b 4b 3b 56 20 10a 8a 5a 4b 3b 2.5b 2.5b 52 20 10a 8a 5a 4b 3b 2.5b 59 20 10a 8a 5a 4b 3b 55 20 10a 8a 5a 4b 3b 2.5b 62 20 10a 6a 5b 3b 2.5b 2b 58 20 10a 6a 5b 3b 2.5b 2b 65 20 10a 6a 5b 3b 2.5b 2b 61 20 10a 6a 5b 3b 2.5b 2b 68 20 8a 6a 4b 3b 2.5b 2b 64 20 8a 6a 4b 3b 2.5b 2b 72 18 10a 8b 5b 4b 3b 2.5b 67 20 8a 6a 4b 3b 2.5b 2b 75 18 10a 8b 5b 3b 3b 2b 71 18 10a 8b 5b 3b 3b 2b 78 18 10a 8b 5b 3b 3b 2b 74 18 10a 8b 5b 3b 3b 2b 20 x 26 22 nr nr nr nr nr nr 77 18 8b 6b 4b 3b 2.5 2c 29 22 nr nr nr nr 6a 5a 80 18 8b 6b 4b 3b 2.5 2c 33 22 nr nr nr 8a 5a 4a 16 x 22 24 nr nr nr nr nr 5a 36 22 nr nr 10a 6a 5a 4a 25 22 nr nr nr nr 6a 5a 39 22 nr 10a 8a 6a 5a 3a 29 22 nr nr nr 8a 5a 4a 42 22 nr 10a 8a 5a 5a 3a 32 22 nr nr 10a 6a 5a 4a 45 22 10a 10a 8a 5a 4a 3a 35 22 nr 10a 8a 6a 5a 3a 48 22 10a 10a 6a 5a 4a 3b 38 22 nr 10a 8a 5a 5a 3a 51 20 10a 10a 6a 5b 4b 3b 41 22 10a 10a 8a 5a 4a 3a 55 20 10a 10a 6a 5b 4b 3b 44 22 10a 10a 6a 5a 4a 3b 58 20 10a 8a 5a 4b 3b 2.5b 47 22 10a 8a 5a 4a 3b 2.5b 61 20 10a 8a 5a 4b 3b 2.5b 51 20 10a 10a 6a 5b 4b 3b 64 20 10a 6a 5b 3b 2.5b 2b 54 20 10a 8a 5a 4b 3b 2.5b 67 20 10a 6a 5b 3b 2.5b 2b 57 20 10a 8a 5a 4b 3b 2.5b 70 18 10a 8b 5b 4b 3b 2.5b 60 20 10a 6a 5b 3b 2.5b 2b 73 18 10a 8b 5b 4b 3b 2.5b 63 20 10a 6a 5b 3b 2.5b 2b 77 18 10a 8b 5b 3b 3b 2b 80 18 10a 8b 5b 3b 3b 2b 66 20 8a 6a 4b 3b 2.5b 2b 69 20 8a 6a 4b 3b 2.5b 2b Example: 8a 8 distance in feet between angle a letter indicates size of angle a 1 1/2” x 1 1/2 “ x 1/8” b 2” x 2” x 3/16” c 2 1/2” x 2 1/2” x 1/4” nr no reinforcement required 13
Duct Width Spiral Seam Duct Gauge Fitting Gauge to 24" 24 20 25 to 36" 22 20 37 to 48" 22 18 49 to 60" 20 18 61 to 70" 20 16 71" and up 18 16 DUAL WALL OVAL DUCT AND FITTINGS CONSTRUCTION STANDARDS Outer Shell Positive Pressure Gauge selection for galvanized (ASTM A653). Fittings are manufactured with standing seam, welded seam .
The cross sectional area of a 6" oval duct is only 75% of that of a 6" round duct. An equivalent round duct would have a 5.1" diameter. This means that for a 6" oval to achieve the same flow rate as a 6" round, the airflow velocity in the oval duct is higher, leading to a greater pressure drop. Round ducts provide more efficient flow than oval .
10 11 3-3/4" Depth 3-3/4" Depth Complete Specifications on pages 20-25. FV-05VS1 FV-08VSL150 CFM 4" Oval Duct FV-08VS1 80 CFM 4" Oval Duct FV-10VS1 100 CFM 4" Oval Duct 80 CFM 4" Oval Duct FV-10VSL1 100 CFM 4" Oval Duct SUPER LOW PROFILE CEILING/WALL MOUNT FAN SUPER LOW PROFILE CEILING MOUNT FAN WITH LIGHT
Single-wall flat oval duct and fittings are also available in carbon steel, paintable galvanized steel, and aluminized steel. 4. Aluminum single-wall flat oval duct and fittings are available in larger sizes and greater metal thicknesses on special order. 5. Fittings 16 gauge (Aluminum - 0.090 inch) or heavier are fully welded. 6.
Single Wall Oval Oval Duct and Fittings Construction Standards Air Distribution Corporation . ACTUAL SPIRAL PIPE OVAL SIZES & CONSTRUCTION CHART Nominal Oval Size Galv Spiral Duct Ga. Galv. Fitting Ga. Weight lb/ft Actual Size 6 x 16 24 20 4.20 15.50 17 24 20 4.5 17.11 19 24 20 4.57 18.76
Oval Duct. Sizes shown are nominal. Consult your manufacture for details. Flat Oval Duct is to be used in positive pressured applications only. Vanstone or other proprietary connections are available by special order. 2005 SMACNA POSITIVE PRESSURE GAUGES MAJOR AXIS SPIRAL SEAM FITTINGS 10-24" 26 22 25-36" 22 22 37-48" 22 22 49-60" 22 22 61-70 .
and oval duct is easy to install, looks great, saves time and reduces costs. 3 DUCT SYSTEM DESIGN MATERIALS AVAILABLE Aluminum Galvanized steel Stainless steel SIZES AVAILABLE Round spiral duct up to 120" in diameter Round longitudinal seam duct to 100 " in diameter Oval spiral duct in over 350 sizes with minors 4 .
IMPERIAL MANUFACTURING GROUP INC. / GALVANIZED DUCT, PIPE & FITTINGS PAGE 5 Galvanized Duct, Pipe & Fittings IMG DIMENSION / UNIT STD . STD . RACK UPC SKUDESCRIPTION MSRPKG QTYQTYCODE Stack Duct - 30 Gauge GV1306 2-1/4" x 10" x 24" Stack Duct 30ga /ft . 12' Ctn - 063467112839 GV1318 2-1/4" x 12" x 24" Stack Duct 30ga /ft .
Introduction to Academic Writing This study pack is designed to take about 50 minutes. It will give you an introduction to academic writing, sharing the most important principles that will guide you through writing during your degree at UCL. It was put together by the Writing Lab, which is the section of the Academic Communication Centre(ACC) that serves students from Bartlett; Psychology .
