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Poundage Chart
How to use the Poundage chart:
Poundage for a 5 foot, 24 gauge, 20 x 20 duct
A 20 x 20 duct = 40 total duct size
Start at 40 on the chart (first column)
40 = 6.87 square feet (second column)
24 gauge weighs 8.30 lbs. per 1 foot of duct (third column)
5 feet x 8.30 = 41.50 lbs.
Total Duct Size
Square Feet
24 Gauge
22 Gauge
20 Gauge
18 Gauge
24"
4.12
5.11
6.23
7.33
9.54
26"
4.45
5.51
6.70
7.90
10.28
28"
4.81
5.92
7.19
8.47
11.04
30"
5.15
6.31
7.67
9.04
11.77
32"
5.48
6.71
8.15
9.60
12.50
34"
5.84
7.10
8.64
10.18
13.26
36"
6.18
7.50
9.13
10.74
13.98
38"
6.52
7.89
9.60
11.31
14.72
40"
6.87
8.30
10.09
11.88
15.48
42"
7.21
8.69
10.56
12.45
16.21
44"
7.55
9.08
11.05
13.02
16.94
46"
7.90
9.48
11.54
13.60
17.70
48"
8.24
9.88
12.02
14.15
18.42
50"
8.58
10.28
12.49
14.72
19.17
52"
8.93
10.68
12.98
15.29
19.92
54"
9.37
11.07
13.47
15.86
20.65
56"
9.61
11.46
13.94
16.42
21.38
58"
9.96
11.87
14.44
17.00
22.14
60"
10.30
12.27
14.91
17.57
22.87
62"
10.64
12.65
15.40
18.12
23.61
64"
10.99
13.06
15.88
18.71
24.36
66"
11.33
13.45
16.36
19.27
25.09
68"
11.66
13.84
16.84
19.83
25.82
70"
12.02
14.25
17.33
20.41
26.58
72"
12.36
14.64
17.80
20.98
27.32
74"
12.70
15.04
18.29
21.55
28.05
76"
13.05
15.44
18.79
22.12
28.80
78"
13.39
15.83
19.26
22.68
29.53
80"
13.73
16.23
19.73
23.25
30.27
82"
14.08
16.62
20.23
23.82
31.02
84"
14.42
17.03
20.71
24.39
31.75
86"
14.76
17.42
21.19
24.96
32.49
88"
15.11
17.83
21.68
25.53
33.25
90"
15.45
18.22
22.16
26.10
33.98
92"
15.79
18.61
22.64
26.66
34.71
94"
16.14
19.01
23.12
27.24
35.46
96"
16.48
19.41
23.61
27.80
36.19
98"
16.82
19.80
24.08
28.37
36.93
100"
17.17
20.21
24.58
28.94
37.69
102"
17.51
20.60
25.05
29.51
38.42
104"
17.85
20.99
25.53
30.08
39.15
106"
18.20
21.39
26.03
30.65
39.90
108"
18.54
21.78
26.50
31.21
40.63
110"
18.88
22.18
26.98
31.78
41.38
112"
19.23
22.59
27.47
32.35
42.13
114"
19.57
22.98
27.95
32.92
42.86
116"
19.91
23.37
28.43
33.48
43.59
118"
20.26
23.78
28.92
34.06
44.35
120"
20.60
24.18
29.40
34.63
45.09
