HSS
HOLLOW STRUCTURAL SECTIONS
(HSS)

SQUARE - GR 350W
A500C
HOLLOW STRUCTURAL SECTIONS 
(HSS)

Imperial Metric Weight lbs./ft.
1/2 x 1/2 x 0.065 12.7 x 12.7 x 1.65 0.38
3/4 x 3/4 x 0.065 19.1 x 19.1 x 1.65 0.61
1 x 1 x 0.065 25.4 x 25.4 x 1.65 0.83
x 0.083 x 2.11 0.95
x 0.1 x 2.54 1.14
x 0.125 x 3.18 1.35
1-1/4 x 1-1/4 x 0.083 31.8 x 31.8 x 1.83 1.32
x 0.1 x 2.54 1.48
x 0.125 x 3.18 1.78
1-1/2 x 1-1/2 x 0.083 38.1 x 38.1 x 2.11 1.51
x 0.1 x 2.54 1.82
x 0.125 x 3.18 2.21
x 0.188 x 4.78 3.35
2 x 2 x 0.1 50.8 x 50.8 x 2.54 2.58
x 0.11 x 2.79 2.72
x 0.125 x 3.18 3.06
x 0.188 x 4.78 4.33
x 0.25 x 6.35 5.41
2-1/2 x 2-1/2 x 0.125 63.5 x 63.5 x 3.18 3.91
x 0.188 x 4.78 5.61
x 0.215 x 5.46 6.2
x 0.25 x 6.35 7.11
Imperial Metric Weight lbs./ft.
3 x 3 x 0.125 76.2 x 76.2 x 3.18 4.76
x 0.188 x 4.78 6.89
x 0.25 x 6.35 8.81
x 0.313 x 7.95 10.59
x 0.375 x 9.53 12.2
3-1/2 x 3-1/2 x 0.125 88.9 x 88.9 x 3.18 5.59
x 0.188 x 4.78 8.17
x 0.25 x 6.35 10.51
x 0.313 x 7.95 12.7
x 0.375 x 9.53 14.71
4 x 4 x 0.125 101.6 x 101.6 x 3.18 6.46
x 0.188 x 4.78 9.45
x 0.25 x 6.35 12.21
x 0.313 x 7.95 14.83
x 0.375 x 9.53 17.27
x 0.5 x 12.70 21.63
4-1/2 x 4-1/2 x 0.188 114.3 x 114.3 x 4.78 10.7
x 0.25 x 6.35 13.9
x 0.313 x 7.95 17
x 0.375 x 9.53 19.8
Imperial Metric Weight lbs./ft.
5 x 5 x 0.125 127 x 127 x 3.18 8.15
x 0.188 x 4.78 12.00
x 0.250 x 6.35 15.62
x 0.313 x 7.95 19.08
x 0.375 x 9.53 22.37
x 0.500 x 12.7 28.43
6 x 6 x 0.188 152.4 x 152.4 x 4.78 14.56
x 0.250 x 6.35 19.02
x 0.313 x 7.95 23.33
x 0.375 x 9.53 27.48
x 0.500 x 12.7 35.24
x 0.625 x 42.30
7 x 7 x 0.188 177.8 x 177.8 x 4.78 17.13
x 0.250 x 6.35 22.42
x 0.313 x 7.95 27.63
x 0.375 x 9.53 32.58
x 0.500 x 12.7 42.05
x 0.625 x - 50.81
8 x 8 x 0.188 203.2 x 203.2 x 4.78 19.63
x 0.250 x 6.35 25.82
x 0.313 x 7.95 31.84
x 0.375 x 9.53 37.69
x 0.500 x 12.7 48.85
x 0.625 x - 59.32
Imperial Metric Weight lbs./ft.
10 x 10 x 0.250 254 x 254 x 6.35 32.63
x 0.313 x 7.95 40.40
x 0.375 x 9.53 47.90
x 0.500 x 12.7 62.46
x 0.625 x - 76.33
x 0.750 x - 89.50
12 x 12 x 0.250 304.8 x 304.8 x 6.35 39.43
x 0.313 x 7.95 48.86
x 0.375 x 9.53 58.10
x 0.500 x 12.7 76.07
x 0.625 x - 93.34
x 0.750 x - 109.91
x 0.875 x 140.96
14 x 14 x 0.313 355.6 x 355.6 x 7.95 57.36
x 0.375 x 9.53 68.31
x 0.500 x 12.7 89.68
x 0.625 x - 110.36
x 0.750 x - 130.33
x 0.875 x - 149.61
x 1.000 x - 168.18
16 x 16 x 0.313 406.4 x 406.4 x 7.95 65.87
x 0.375 x 9.53 78.52
x 0.500 x 12.7 103.30
x 0.750 x 150.75
x 0.875 x 173.43
x 1.000 x 195.40
Imperial Metric Weight lbs./ft.
18 x 18 x 0.375 - x 9.53 88.73
x 0.500 x 12.7 116.91
x 0.625 x - 144.29
x 0.750 x - 171.16
x 0.875 x - 197.24
x 1.000 - x 9.53 222.63
20 x 20 x 0.375 - x 9.53 98.94
x 0.500 x 12.7 130.52
x 0.625 x - 161.40
x 0.750 x - 191.58
x 0.875 x - 221.06
x 1.000 x - 249.85
22 x 22 x 0.500 x - 144.13
x 0.625 x - 178.41
x 0.750 x - 212.00
x 0.875 x - 244.88
x 1.000 x - 277.07

RECTANGULAR - GR 350W
A500C
HOLLOW STRUCTURAL SECTIONS 
(HSS)

Imperial Metric Weight lbs./ft.
2 x 1 x 0.083 50.8 x 25.4 x 2.11 1.54
x 0.100 x x 2.54 1.82
x 0.125 x x 3.18 2.21
2-1/2 x 1-1/2 x 0.125 63.5 x 38.1 x 3.18 3.06
x 0.188 x x 4.78 4.33
3 x 1 x 0.100 76.2 x 25.4 x 2.54 2.58
x 0.125 x x 3.18 3.06
x 0.188 x x 4.78 4.32
x 0.250 x x 6.35 5.41
3 x 1-1/2 x 0.100 76.2 x 38.1 x 2.54 2.92
x 0.125 x x 3.18 3.48
x 0.188 x x 4.78 4.96
3 x 2 x 0.125 76.2 50.8 3.91
x 0.188 x x 4.78 5.61
x 0.250 x x 6.35 7.11
3-1/2 x 2-1/2 x 0.188 88.9 x 63.5 x 4.78 6.89
x 0.250 x x 6.35 8.80
4 x 2 x 0.125 101.6 x 50.8 x 3.18 4.76
x 0.188 x x 4.78 6.89
x 0.250 x x 6.35 8.81
4 x 3 x 0.125 101.6 x 76.2 x 3.18 5.61
x 0.188 x x 4.78 8.17
x 0.250 x x 6.35 10.51
x 0.375 x x 9.53 14.71
Imperial Metric Weight lbs./ft.
5 x 2 x 0.125 127.0 x 50.8 x 3.18 5.61
x 0.188 x x 4.78 8.17
x 0.250 x x 6.35 10.51
x 0.375 x x 9.53 14.7
5 x 3 x 0.188 127.0 x 76.2 x 4.78 9.45
x 0.250 x x 6.35 12.21
x 0.375 x x 9.53 17.27
6 x 2 x 0.125 152.4 x 50.8 x 3.18 6.46
x 0.188 x x 4.78 9.45
x 0.250 x x 6.35 12.21
x 0.313 x x 7.95 14.8
x 0.375 x x 9.53 17.27
6 x 3 x 0.188 152.4 x 76.2 x 4.78 10.7
x 0.250 x x 6.35 13.91
x 0.313 x x 7.95 17.0
x 0.375 x x 9.53 19.82
6 x 4 x 0.188 152.4 x 101.6 x 4.78 12.0
x 0.250 x x 6.35 15.62
x 0.313 x x 7.95 19.08
x 0.375 9.53 22.37
x 0.500 x x 12.7 28.43
7 x 5 x 0.125 - x - x x - 8.16
x 0.188 177.8 x 127.0 x 4.78 14.56
x 0.250 x x 6.35 19.02
x 0.313 x x 7.95 23.4
x 0.375 x x 9.53 27.48
x 0.500 x x 12.7 35.24
Imperial Metric Weight lbs./ft.
8 x 2 x 0.125 - x - x x - 8.16
x 0.188 203.2 x 50.8 x 4.78 11.90
x 0.250 x x 6.35 15.62
x 0.375 x x 9.53 21.9
8 x 3 x 0.188 203.2 x 76.2 x 4.78 13.3
x 0.250 x x 6.35 17.3
x 0.375 x x 9.53 24.9
8 x 4 x 0.188 203.2 x 101.6 x 4.78 14.56
x 0.250 x x 6.35 19.02
x 0.313 x x 7.95 23.4
x 0.375 x x 9.53 27.48
x 0.500 x x 12.7 35.24
8 x 6 x 0.188 203.2 x 152.4 x 4.78 17.13
x 0.250 x x 6.35 22.42
x 0.313 x x 7.95 27.63
x 0.375 x x 9.53 32.58
x 0.500 x x 12.7 42.05
Imperial Metric Weight lbs./ft.
10 x 4 x 0.188 254.0 x 101.6 x 4.78 17.1
x 0.250 x x 6.35 22.42
x 0.313 x x 7.95 27.63
x 0.375 x x 9.53 32.6
x 0.500 x x 42.05
x 0.625 x x 50.81
10 x 6 x 0.250 254.0 152.4 6.35 25.82
x 0.313 x x 7.95 31.84
x 0.375 x x 9.53 37.69
x 0.500 x x 48.85
x 0.625 x x 59.32
10 x 8 x 0.250 254.0 x 203.2 x 6.35 29.23
x 0.375 x x 9.53 41.9
x 0.500 x x 12.7 54.1
x 0.625 x x 67.82
12 x 6 x 0.250 304.8 x 152.4 x 6.35 29.23
x 0.375 x x 9.53 41.9
x 0.500 x x 12.7 54.1
x 0.625 x x 67.82
12 x 8 x 0.250 304.8 x 203.2 x 6.35 32.63
x 0.313 x x 7.95 40.4
x 0.375 x x 9.53 47.9
x 0.500 x x 12.7 62.46
x 0.625 x x 76.33
Imperial Metric Weight lbs./ft.
14 x 6 x 0.25 355.6 x 152.4 x 6.35 32.63
x 0.313 x x 7.95 40.35
x 0.375 x x 9.53 47.9
x 0.5 x x 12.7 62.46
14 x 10 x 0.313 355.6 x 254 x 7.95 48.86
x 0.375 x x 9.53 58.1
x 0.5 x x 12.7 76.07
x 0.75 x x 109.91
x 0.875 x x 125.79
16 x 8 x 0.313 406.4 x 203.2 x 7.95 48.86
x 0.375 x x 9.53 58.1
x 0.5 x x 12.7 76.07
x 0.75 x x 109.91
x 0.875 x x 125.79
16 x 12 x 0.313 406.4 x 304.8 x 7.95 57.36
x 0.375 x x 9.53 68.31
x 0.5 x x 12.7 89.68
x 0.75 x x 130.33
x 0.875 x x 149.61
x 1 x x 168.18
Imperial Metric Weight lbs./ft.
18 x 6 x 0.75 x x 109.91
20 x 8 x 0.75 x x 130.33
x 0.875 x x 149.61
x 1 x x 168.18
20 x 12 x 0.75 x x 150.75
x 0.875 x x 173.43
x 1 x x 195.4
24 x 12 x 0.375 x x 88.73
x 0.5 x x 116.91
x 0.625 x x 144.39
x 0.75 x x 171.16
x 0.875 x x 197.24
x 1 x x 222.63
30 x 10 x 0.5 x x 130.52
x 0.625 x x 161.4
x 0.75 x x 191.58
x 0.875 x x 221.06
x 1 x x 249.85
34 x 10 x 0.625 x x 178.41
x 0.75 x x 212
x 0.875 x x 244.88
x 1 x x 277.07

ROUND - GR 350W
A500C
HOLLOW STRUCTURAL SECTIONS 
(HSS)

in. 0.083 0.100 0.109 0.113 0.120 0.125 0.133 0.134 0.140 0.145 0.154 0.179 0.188 0.191 0.200 0.203
1.050 — — — 1.131 — — — — — — — — — — — —
1.315 — 1.404 — — 1.590 1.679 — — — — 2.172 — — — —
1.66 1.670 1.810 — — 2.051 — 2.186 2.270 — — — — 2.997 — —
1.9 — 1.924 2.085 — — 2.372 — 2.530 — 2.780 — — 3.432 — 3.631 —
2.375 — — 2.638 — — 3.007 — 3.210 — — 3.660 — 4.385 — — —
2.875 — — — — 3.531 3.675 — 3.930 — — — — 5.400 — — 5.800
3.5 — — — — 4.332 4.510 — 4.820 — — — — 6.656 — — —
4 — — — 4.972 5.178 — 5.540 — — — — 7.661 — — —
4.5 — — — — 5.614 — — 6.254 — — — — 8.644 — — —
5 — — — — 6.514 — 6.970 — — — — 9.671 — — —
5.563 — — — — — — — 7.777 — — — — 10.775 — — —
6.625 — — — — — — — 9.298 — — — — 12.903 — — —
7 — — — — — — — — — — — 13.690 — — —
7.25 — — — — — — — — — — — — — — — —
7.5 — — — — — — — — — — — — — — —
8.625 — — — — — — — — — — — — 16.956 — — —
9.625 — — — — — — — — — — — — — — —
10.0 — — — — — — — — — — — — 19.722 — — —
10.75 — — — — — — — — — — — — 21.171 — — —
11.75 — — — — — — — — — — — — — — — —
12 — — — — — — — — — — — — — — — —
12.75 — — — — — — — — — — — — — — — —
13.375 — — — — — — — — — — — — — — — —
14.0 — — — — — — — — — — — — 27.760 — — —
16.0 — — — — — — — — — — — — 31.780 — — —
18.0 — — — — — — — — — — — — — — — —
20 — — — — — — — — — — — — — — — —
in. 0.216 0.218 0.237 0.25 0.258 0.276 0.28 0.3 0.313 0.318 0.322 0.337 0.342 0.365 0.375 0.5 0.625 0.75 0.875 1
1.05 — — — — — — — — — — — — — — — — —
1.315
1.66
1.9 — — — — — — — — — — — — — — — — —
2.375 — 5.02 — 5.674 — — — — — — — — — — — — —
2.5 — — — 6.013 — — — — — — — — — — — — —
2.875 — — — 7.015 — 7.661 — — — — — — — — — — —
3 — — — 7.349 — — — — — — — — — — — — —
3.5 7.58 — — 8.686 — — — 10.253 — — — — — — — — —
4 — — — 10.022 — — — — — 12.51 — — — — — — —
4.5 — — 10.79 11.358 — — — — 14.01 — — 14.983 — — 16.536 — —
5 — — — 12.694 — — — — 15.683 — — — — — 18.54 24.05 —
5.563 — — — 14.199 14.63 — — — — — — — — — 20.797 27.062 —
6.625 — — — 17.037 — — 18.99 — 21.12 — — — — — 25.055 32.738 —
7 — — — 18.039 — — — — 22.375 — — — — — 26.558 34.743 —
7.25 — — — 18.71 — — — — 23.214 — — — — — 27.564 36.084 44.269
7.5 — — — 19.38 — — — — 24.05 — — — — — 28.56 37.42 45.93
8.625 — — — 22.382 — — — — 27.81 — 28.58 — — — 33.072 43.428 53.45
9.625 — — — 25.055 — — — — 31.158 — — — 33.94 — 37.081 48.773 60.131
10 — — — 26.06 — — — — 32.417 — — — — — 38.58 50.784 62.645
10.75 — — — 28.061 — — — — 34.922 — — — 38.581 41.591 54.786 67.648
11.75 — — — 30.734 — — — — — — — — — — 45.6 60.131 74.329
12 — — — 31.402 — — — — 39.1 — — — — — 46.602 61.468 75.999
12.75 — — — 33.406 — — — — 41.61 — — — — — 49.608 65.476 81.01 96.21 111.08 -
13.375 — — — 35.077 — — — — 43.71 — — — — — 52.114 68.817 85.186 - - -
14 — — — 36.747 — — — — 45.8 — — — — — 54.619 72.158 89.362 106.23 122.77 138.97
16 — — — 42.092 — — — — 52.49 — — — — — 62.637 82.848 102.724 122.27 141.48 160.35
18 — — — 47.437 — — — — 59.18 — — — — — 70.654 93.54 116.087 138.3 160.19 181.73
20 — — — 52.782 — — — — 65.87 — — — — — 78.672 104.228 129.449 154.34 178.89 203.11

COMMON STOCK LENGTH (feet) 
20 / 24 / 40 / 48 / 60
TOLERANCES
Wall Thickness + / - 10% +10% / -5%
SQUARE STRUCTURAL TUBE GRADES
A500 Grade C CSA 350W A1085
Yield Strength 50,000 psi 50,000 psi 70,000 psi
Tensile Strength 62,000 psi 65,000 psi 65,000 psi
RECTANGULAR STRUCTURAL TUBE GRADES
A500 Grade C CSA 350W A1085
Yield Strength 50,000 psi 50,000 psi 70,000 psi
Tensile Strength 62,000 psi 65,000 psi 65,000 psi
ROUND STRUCTURAL TUBE GRADES
A500 Grade C CSA 350W A1085
Yield Strength 46,000 psi 50,000 psi 50,000 psi
Tensile Strength 62,000 psi 65,000 psi 65,000 psi