Specifications

Structural Tubing is a hollow section most commonly constructed from hot rolled metal coils.  The coils are slit to the proper width for the section being manufactured and then formed into the final shape needed.  Once the size is formed and the seams are welded together the tube is cut to the desired length to make a single piece of tubing.  Structural tubing is offered in round, rectangular and square shapes.

Structural tubing is relatively low in cost, has a high strength-to-weight ratio and is easily welded, formed, punched, and drilled.  Its hollow shape protects and conceals wires, pipes, moving parts and it can be left exposed.  Additionally it can offer a lightweight alternative to solid steel products such as I-Beams and Wide Flange.  Triad Metals International offers many different sizes, lengths and specifications for Structural Tubing.

ASTM – 500 – Standard specification for cold-formed welded and seamless carbon steel structural tubing in rounds and shapes .  This specification covers cold-formed steel round, square, rectangular, or special shape structural tubing for welded, riveted, or bolted construction of bridges and buildings, and for general structural purposes.  Four grades are produced each having a different chemistry and tensile requirement.

Grades B and C, being the most common stock available, can be subjected to most of the usual fabricating operations.  Ductility is good.  Bends well, flattens, cuts, punches, flares, flanges and welds easily.

Square Tube Sizes

Squares

  Square Tube square

SizeGauge DecimalWt. Per Ft.
1/2 x 1/2160.0650.385
140.0830.470
3/4 x 3/4160.0650.605
140.0830.753
110.1201.030
1 x 11/80.1251.028
160.0630.83
140.0831.035
1/80.1251.44
1-1/4 x 1-1/4 160.0651.048
140.0831.32
1/80.1251.85
3/160.1882.62
1/40.2504.11
1-1/2 x 1-1/2160.0651.269
140.0831.60
1/80.1252.252
3/160.1883.23
1/40.2504.11
1-3/4 x 3/4160.0651.49
140.0831.88
1/80.1252.66
3/160.1883.99
2 x 2160.0651.7103
140.0832.17
1/80.1253.07
3/160.1884.32
5/160.3126.32
1/40.2505.41
2-1/2 x 2-1/2 160.0652.15
140.0832.73
1/80.1253.91
3/160.1885.61
1/40.2507.11
5/160.3128.43
3 x 3160.0652.59
140.0833.26
1/80.1254.75
3/160.1886.87
1/40.2508.81
5/160.31210.58
3-1/2 x 3-1/2140.0833.80
1/80.1255.61
3/160.1888.15
1/40.25010.51
5/160.31212.7
3/80.37514.72
4 x 41/80.1256.46
3/160.1889.42
1/40.25012.21
5/160.31214.83
3/80.37517.27
1/20.521.63
5 x 53/160.18811.97
1/40.2515.62
5/160.31219.08
3/80.37522.37
1/20.528.43
5/80.62533.76
6 x 63/160.18814.53
1/40.25019.02
5/160.31223.34
3/80.37527.48
1/20.535.24
5/80.62542.3
7 x 73/160.18817.08
1/40.25022.42
5/160.31227.59
3/80.37532.58
1/20.542.05
5/80.62550.81
8 x 83/160.18819.63
1/40.25025.82
5/160.31231.84
3/80.37537.69
1/20.548.85
5/80.62559.32
9 x 91/40.25029.23
5/160.31236.12
3/80.37542.79
1/20.555.66
5/80.62567.82
10 x 103/160.18824.73
1/40.25032.63
5/160.31240.35
428020.37547.9
1/20.562.46
5/80.62576.33
12 x 123/160.18829.84
1/40.25039.43
5/160.31248.86
3/80.37558.1
1/20.576.07
5/80.62593.34
14 x 145/160.31257.36
3/80.37568.31
1/20.589.68
5/80.625110.36
16 x 165/160.31265.87
3/80.37578.52
1/20.5103.3
5/80.625127.37

Rectangular Tube Sizes

Rectangular Tubing

Rectangular Tubingrectangle

Size in InchesAverage Wall Gauge
Average Wall DecimalWt. Per Ft (lbs)
1 1/2 x 1160.0651.05
140.0831.32
2 x 1 1/21/80.1251.84
160.0651.27
140.0831.6
1/80.1252.25
3/160.1883.4
2 x 1-1/2160.0651.49
140.0831.88
1/80.1252.63
3/160.1883.68
2-1/2 x 1160.0651.49
140.0831.88
1/80.1252.66
2 1/2 x 1-1/2160.0651.69
140.0832.16
1/80.1253.06
3/160.1884.32
1/40.2505.41
3 x 1-1/2160.0651.71
140.0832.16
1/80.1253.06
3/160.1884.23
1/40.2505.41
3 x 1-1/2160.0651.93
140.0832.45
1/80.1253.76
3/160.1884.97
3 x 2160.0652.15
140.0832.73
1/80.1253.9
3/160.1885.59
1/40.2507.11
5/160.3128.45
3 x 2 1/2140.0833.01
1/80.1254.29
3/160.1886.29
1/40.2507.96
3 1/2 x 1-1/2160.0652.15
140.0832.75
1/80.1253.9
3/160.1885.59
1/40.2507.11
3-1/2 x 2140.0833.01
1/80.1254.29
3/160.1886.29
3-1/2 x 2-1/2160.0652.59
140.0833.26
1/80.1254.75
3/160.1886.87
1/40.2508.81
5/160.31210.58
4 x 2160.0652.59
140.0833.29
1/80.1254.75
3/160.1886.87
1/40.2508.81
5/160.31210.58
3/80.37512.17
4 x 2-1/2140.0833.55
1/80.1255.18
3/160.1887.51
1/40.2509.66
4 x 3140.0833.8
1/80.1255.61
3/160.1888.15
1/40.25010.51
5/160.31212.7
3/80.37514.71
4-1/2 x 2140.0833.55
1/80.1255.11
3/160.1887.48
1/40.2509.65
5 x 2140.0833.8
1/80.1255.61
3/160.1888.15
1/40.25010.51
5/160.31212.7
3/80.37514.71
5 x 2 1/21/80.1256.03
3/160.1888.78
1/40.2511.36
5 x 31/81.256.46
3/161.889.42
1/40.25012.21
5/160.31214.83
3/80.37517.27
1/20.521.63
5/80.62525.26
5 x 41/80.1257.31
3/160.18810.7
1/40.25013.91
5/160.31216.96
3/80.37519.82
1/20.525.03
6 x 21/80.1256.46
3/160.1889.42
1/40.25012.21
5/160.31214.83
3/80.37517.27
1/20.521.63
5/80.62525.26
6 x 31/80.1257.31
3/160.18810.7
1/40.25013.91
5/160.31216.96
3/80.37519.82
1/20.525.03
6 x 41/80.1258.16
3/160.18811.97
1/40.25015.62
5/160.31219.08
3/80.37522.37
1/20.528.43
6 x 53/160.18813.3
1/40.25017.32
5/160.31221.22
3/80.37524.93
1/20.531.84
7 x 33/160.18811.97
1/40.25015.62
5/160.31219.08
3/80.37522.37
1/20.528.43
7 x 43/160.18813.3
1/40.25017.32
5/160.31221.22
3/80.37524.93
1/20.531.84
7 x 53/160.18814.53
1/40.25019.02
5/160.31223.34
3/80.37527.48
1/20.535.24
5/80.62542.3
8 x 23/160.18811.97
1/40.25015.62
5/160.31219.08
3/80.37522.37
8 x 33/160.18813.3
1/40.25017.32
5/160.31221.22
3/80.37524.93
1/20.531.81
8 x 43/160.18814.53
1/40.25019.02
5/160.31223.34
3/80.37527.48
1/20.535.24
5/80.62542.26
8 x 63/160.18817.11
1/40.25022.42
5/160.31327.59
3/80.37532.58
1/20.542.05
5/80.62550.81
9 x 31/40.2519.02
5/160.31223.34
3/80.37527.48
1/20.535.24
9 x 55/160.31227.59
3/80.37532.58
1/40.25022.42
1/20.542.05
5/80.62550.81
9 x 73/160.18819.63
1/40.25025.82
5/160.31231.86
3/80.37537.69
1/20.548.85
5/80.62559.32
10 x 23/160.18814.55
1/40.25019.02
5/160.31223.34
3/80.37527.48
10 x 33/160.18815.8
1/40.25020.72
5/160.31225.46
3/80.37530.03
10 x 43/160.18817.08
1/40.25022.42
5/160.31227.59
3/80.37532.58
1/20.542.05
5/80.62550.76
10 x 53/160.18818.35
1/40.25024.12
5/160.31229.72
3/80.37535.13
1/20.545.45
10 x 63/160.18819.66
1/40.25025.82
5/160.31231.84
3/80.37537.69
1/20.548.85
5/80.62559.32
10 x 83/160.18822.22
1/40.25029.23
5/160.31236.1
3/80.37542.79
1/20.555.66
12 x 23/160.18817.11
1/40.25022.42
5/160.31227.59
3/80.37532.58
12 x 33/160.18818.4
1/40.25024.1
5/160.31229.7
3/80.37535.13
12 x 43/160.18819.66
1/40.25025.82
5/160.31231.84
3/80.37537.69
1/20.548.85
5/80.62559.32
12 x 63/160.18822.22
1/40.25029.23
5/160.31236.1
3/80.37542.79
1/20.555.66
5/80.62567.82
12 x 83/160.18824.77
1/40.25032.63
5/160.31240.35
3/80.37547.9
1/20.562.46
5/80.62576.33
12 x 101/40.25036.03
5/160.31244.7
3/80.37553
1/20.569.27
14 x 43/160.18822.22
1/40.25029.23
5/160.31236.1
3/80.37542.79
1/20.555.66
5/80.62567.82
14 x 63/160.18824.77
1/40.25032.63
5/160.31240.35
3/80.37547.9
1/20.562.46
5/80.62576.33
14 x 101/40.25039.43
5/160.31248.86
3/80.37558.1
1/20.576.07
5/80.62593.34
16 x 41/40.25032.63
5/160.31240.35
3/80.37547.9
1/20.562.46
5/80.62576.33
16 x 81/40.25039.43
5/160.31248.86
3/80.37558.1
1/20.576.07
5/80.62593.34
16 x 125/160.31257.36
3/80.37568.31
1/20.589.68
5/80.625110.36
18 x 61/40.25039.43
5/160.31248.86
3/80.37558.1
1/20.576.07
5/80.62593.34
20 x 41/40.25039.43
5/160.31248.86
3/80.37558.1
1/20.576.07
20 x 85/160.31257.36
3/80.37568.31
1/20.589.68
5/80.625110.36
20 x 125/160.31265.87
3/80.37578.52
1/20.5103.3

Processing, Our Capabilities

  • Supply Chain Services
    Through our global transportation network, we can customize our supply chain to get you your order in the most efficient way possible.
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  • Barge Unloading
    We offer Barge loading & unloading with 220,000sq feet of under cover storage.
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  • Plate Processing
    We have the ability to produce engineered-to-order parts that meet your specifications.
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  • Structural Processing
    We process sheet and coil to meet your dimensional and tolerance requirements.
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