Straight Ducts

Round Duct

ATS Part Types #6, 9, 10 for 2″-38″ [50mm-950mm] ⌀

The ATS standard duct lengths are 10 foot (3 meters) or 20 foot (6 meters).

Nominal
Diameter		 Inner Diameter (ID) Outer Diameter (OD) Wall Thickness Weight
in. mm in. mm in. mm in. mm lbs/ft kgs/m
2 50 2 1/4 57 2 7/16 62 5/32 4 1 1.5
3 75 3 1/4 83 3 7/16 87 5/32 4 2 3.0
4 100 4 1/4 108 4 7/16 113 5/32 4 2 3.0
6 150 6 1/4 159 6 7/16 164 5/32 4 3 4.5
8 200 8 1/4 210 8 7/16 214 5/32 4 4 6.0
10 250 10 1/4 260 10 7/16 265 5/32 4 5 7.5
12 300 12 1/4 311 12 7/16 316 5/32 4 6 8.9
14 350 14 1/4 362 14 7/16 367 5/32 4 6 8.9
16 400 16 1/4 413 16 7/16 418 5/32 4 7 10.4
18 450 18 1/4 464 18 7/16 468 5/32 4 8 11.9
20 500 20 1/4 514 20 1/2 521 7/32 5 12 17.9
22 550 22 1/4 565 22 1/2 572 7/32 5 14 20.9
24 600 24 1/4 616 24 1/2 622 7/32 5 15 22.4
26 650 26 1/4 667 26 1/2 673 7/32 5 16 23.9
28 700 28 1/4 718 28 7/16 722 7/32 5 20 29.8
30 750 30 3/8 772 30 9/16 776 7/32 5 21 31.3
32 800 32 3/8 822 32 11/16 830 1/4 6 23 34.3
34 850 34 3/8 873 34 11/16 881 1/4 6 24 35.8
36 900 36 3/8 924 36 11/16 932 1/4 6 26 38.8
38 950 38 3/8 975 38 11/16 983 1/4 6 27 40.3

Round Ribbed Duct

ATS Part Types #8 for 40″-160″ [1000mm-4000mm] ⌀

Nominal
Diameter		 Inner Diameter (ID) Outer Diameter (OD) Wall Thickness Rib Thickness Tot. Outside Dim. Weight
in. mm in. mm in. mm in. mm in. mm in. mm lbs/ft kgs/m
40 1000 40 3/8 1026 40 7/8 1038 1/4 6 5/8 16 42 3/4 1086 33 49.2
42 1050 42 3/8 1076 42 7/8 1089 1/4 6 5/8 16 44 3/4 1137 35 52.2
44 1100 44 3/8 1127 44 7/8 1140 1/4 6 5/8 16 46 3/4 1187 37 55.2
46 1150 46 3/8 1178 46 7/8 1191 1/4 6 5/8 16 48 3/4 1238 39 58.1
48 1200 48 3/8 1229 48 7/8 1241 1/4 6 5/8 16 50 3/4 1289 40 59.6
50 1250 50 3/8 1280 50 7/8 1292 1/4 6 5/8 16 52 3/4 1340 42 62.6
52 1300 52 3/8 1330 52 7/8 1343 1/4 6 3/4 19 55 3/16 1402 43 64.1
54 1350 54 3/8 1381 54 7/8 1394 1/4 6 3/4 19 57 3/16 1453 44 65.6
56 1400 56 3/8 1432 56 7/8 1445 1/4 6 3/4 19 59 3/16 1503 45 67.1
58 1450 58 3/8 1483 58 7/8 1495 1/4 6 3/4 19 61 3/16 1554 46 68.6
60 1500 60 3/8 1534 60 7/8 1546 1/4 6 3/4 19 63 3/16 1605 48 71.6
62 1550 62 3/8 1584 62 7/8 1597 1/4 6 1 25 65 3/4 1670 50 74.5
64 1600 64 3/8 1635 64 7/8 1648 1/4 6 1 25 67 3/4 1721 52 77.5
68 1700 68 3/8 1737 68 7/8 1749 1/4 6 1 25 71 3/4 1822 54 80.5
72 1800 72 3/8 1838 72 7/8 1851 1/4 6 1 25 75 3/4 1924 68 101.4
76 1900 76 3/8 1940 77 1956 9/32 7 1 25 80 2032 74 110.3
80 2000 80 3/8 2042 81 2057 9/32 7 1 25 84 2134 78 116.3
84 2100 84 3/8 2143 85 2159 9/32 7 1 1/4 32 88 5/8 2251 83 123.7
88 2200 88 3/8 2245 89 2261 9/32 7 1 1/4 32 92 5/8 2353 87 129.7
92 2300 92 3/8 2346 93 2362 9/32 7 1 1/4 32 96 5/8 2454 91 135.7
96 2400 96 3/8 2448 97 2464 9/32 7 1 1/4 32 100 3/4 2559 95 141.6
100 2500 100 3/8 2550 101 1/8 2569 5/16 8 1 5/16 33 105 1/16 2669 99 147.6
104 2600 104 3/8 2651 105 1/8 2670 5/16 8 1 5/16 33 109 1/16 2770 106 158.0
108 2700 108 3/8 2753 109 1/8 2772 5/16 8 1 5/16 33 113 1/16 2872 112 167.0
112 2800 112 3/8 2854 113 1/8 2873 5/16 8 1 5/16 33 117 1/16 2973 118 175.9
116 2900 116 3/8 2956 117 1/8 2975 3/8 9 1 1/2 38 121 3/4 3092 124 184.9
120 3000 120 3/8 3058 121 1/8 3077 3/8 9 1 1/2 38 125 3/4 3194 132 196.8
124 3100 124 3/8 3159 125 1/8 3178 3/8 9 1 1/2 38 129 3/4 3296 141 210.2
128 3200 128 3/8 3261 129 1/8 3280 3/8 9 1 1/2 38 133 3/4 3397 150 223.6
132 3300 132 3/8 3362 133 1/8 3381 3/8 9 1 3/4 44 138 1/2 3518 159 237.1
136 3400 136 3/8 3464 137 1/8 3483 3/8 9 1 3/4 44 142 1/2 3620 168 250.5
140 3500 140 3/8 3566 141 1/8 3585 3/8 9 1 3/4 44 146 1/2 3721 177 263.9
144 3600 144 3/8 3667 145 1/8 3686 3/8 9 1 3/4 44 150 1/2 3823 186 277.3
148 3700 148 3/8 3769 149 1/8 3788 3/8 9 1 3/4 44 154 1/2 3924 195 290.7
152 3800 152 3/8 3870 153 1/8 3889 3/8 9 2 51 159 4039 205 305.6
156 3900 156 3/8 3972 157 1/8 3991 3/8 9 2 51 163 4140 215 320.5
160 4000 160 3/8 4074 161 1/8 4093 3/8 9 2 51 167 4242 226 336.9