Rectangular Hollow Sections

Rectangular Steel Tubes

Rectangular hollow sections or rec tubes are cold formed and welded from either hot rolled, cold rolled, pre-galvanized or stainless steel.

In order to form the rectangular steel section the appropriate mother tube, a round steel tube, has to be formed first. From a round tube rolls are used that progressively press the round tube into a rectangular hollow section. This is all done inline. For example: A round tube with an outside diameter of 101.6 is pressed into an 80x80 square tube.

Square and rectangular steel tubes have the advantage of being stronger in bending while a round hollow section has more stiffness in twisting

retengular_hollow_sections

Rectangular Hollow Section Moment of Inertia Calculator:

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H: mm
b: mm
h: mm

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Rectangular hollow sections dimensions and properties

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Designation h*b*t m A J
mm kg/m 103mm2 106mm4
60x40x3.0 4.48 0.533 0.293
3.5 5.18 0.609 0.331
4.0 5.87 0.681 0.365
4.5 6.55 0.750 0.396
76x38x3.0 5.18 0.617 0.374
3.5 6.00 0.707 0.422
4.0 6.81 0.793 0.466
4.5 7.60 0.876 0.506
76x50x3.0 5.70 0.689 0.606
3.5 6.60 0.791 0.690
4.0 7.50 0.889 0.768
4.5 8.38 0.984 0.841
100x50x3.0 6.81 0.833 0.889
3.5 7.90 0.959 1.01
4.0 8.98 1.08 1.13
4.5 10.0 1.20 1.24
5.0 11.1 1.31 1.35
120x60x3.0 8.23 1.01 1.57
3.5 9.56 1.17 1.80
4.0 10.9 1.32 2.02
4.5 12.2 1.47 2.23
5.0 13.5 1.61 2.43
6.0 16.0 1.89 2.79
160x80x3.0 11.1 1.37 3.82
3.5 12.9 1.59 4.40
4.0 14.6 1.80 4.96
4.5 16.4 2.01 5.50
5.0 18.2 2.21 6.03
6.0 21.7 2.61 7.04
203x102x3.5 16.4 2.04 9.23
4.5 21.0 2.59 11.6
6.0 27.8 3.39 15.0
8.0 36.6 4.47 18.5
10.0 45.3 5.32 22.0
200x150x3.5 18.6 2.36 17.2
4.5 23.8 3.00 21.8
6.0 31.5 3.93 28.4
8.0 41.6 5.12 36.6
10.0 51.6 6.26 44.3
250x100x3.5 18.6 2.36 11.7
4.5 23.8 3.00 14.8
6.0 31.5 3.93 19.1
8.0 41.6 5.12 24.4
10.0 51.6 6.26 29.1
300x150x4.5 29.8 3.90 38.3
6.0 39.5 5.13 50.1
8.0 52.3 6.72 64.9
10.0 64.9 8.26 78.8
320x220x4.5 35.5 4.71 79.4
6.0 47.1 6.12 104
8.0 62.3 8.16 136
10.0 77.4 10.1 167
340x200x4.5 35.5 4.71 73.9
6.0 47.1 6.21 97.0
8.0 62.3 8.16 127
10.0 77.4 10.1 155

Rectangular hollow sections dimensions and properties (continued)

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Designation h*b*t I Ze Zpl r I Ze Zpl r
mm 106mm4 103mm3 103mm3 mm 106mm4 103mm3 103mm3 mm
60x40x3.0 0.247 8.23 10.3 21.5 0.131 6.56 7.79 15.7
3.5 0.247 9.13 11.6 21.2 0.145 7.26 8.75 15.4
4.0 0.297 9.91 12.7 20.9 0.157 7.87 9.62 15.2
4.5 0.317 10.6 13.8 20.6 0.167 8.37 10.4 14.9
76x38x3.0 0.432 11.4 14.5 26.5 0.146 7.67 8.95 15.4
3.5 0.482 12.7 16.4 26.1 0.162 8.52 10.1 15.1
4.0 0.527 13.9 18.1 25.8 0.176 9.26 11.1 14.9
4.5 0.566 14.9 19.7 25.4 0.188 9.90 12.1 14.7
76x50x3.0 0.528 13.9 17.1 27.7 0.276 11.0 12.9 20.0
3.5 0.593 15.6 19.4 27.4 0.309 12.4 14.6 19.8
4.0 0.652 17.1 21.6 27.1 0.339 13.6 16.2 19.5
4.5 0.704 18.5 23.6 26.8 0.366 14.6 17.6 19.3
100x50x3.0 1.05 20.9 26.3 35.4 0.356 14.2 16.2 20.7
3.5 1.18 23.6 29.9 35.1 0.400 16.0 18.5 20.4
4.0 1.31 26.1 33.4 34.8 0.441 17.6 20.6 20.2
4.5 1.42 28.4 36.7 34.4 0.478 19.1 22.6 20.0
5.0 1.53 30.6 39.8 34.1 0.511 20.4 24.4 19.7
120x60x3.0 1.86 31.1 38.7 42.9 0.637 21.2 24.0 25.1
3.5 2.12 35.3 44.3 42.6 0.721 24.0 27.4 24.8
4.0 2.36 39.3 49.7 42.2 0.800 26.7 30.7 24.6
4.5 2.58 43.0 54.8 41.9 0.873 29.1 33.8 24.4
5.0 2.79 46.5 59.7 41.6 0.941 31.4 36.7 24.1
6.0 3.17 52.8 68.7 40.9 1.06 35.3 42.2 23.7
160x80x3.0 4.59 57.4 70.8 57.8 1.58 39.4 44.0 33.9
3.5 5.25 65.7 81.4 57.5 1.80 45.0 50.5 33.7
4.0 5.89 73.6 91.8 57.2 2.01 50.3 56.8 33.4
4.5 6.50 81.2 102 56.9 2.22 55.4 63.0 33.2
5.0 7.08 88.5 111 56.5 2.41 60.2 68.9 33.0
6.0 8.16 102 130 55.9 2.76 69.0 80.1 32.5
203x102x3.5 11.1 109 134 73.6 3.84 75.3 83.7
4.5 13.8 136 169 73.0 4.77 93.6 105
6.0 17.6 173 218 72.0 6.04 118 135
8.0 21.7 214 277 70.5 7.16 143 167
10.0 25.4 250 333 69.1 8.30 166 198 39
200x150x3.5 13.9 139 164 76.8 8.99 120 135 61.7
4.5 17.4 174 207 76.3 11.2 150 171 61.2
6.0 22.4 224 268 75.4 14.4 192 221 60.5
8.0 28.3 283 344 74.3 18.2 242 283 59.5
10.0 33.5 335 413 73.2 21.4 286 339 58.5
250x100x3.5 18.4 147 184 88.2 4.44 88.8 97.5 43.4
4.5 23.0 184 233 87.5 5.53 111 123 42.9
6.0 29.4 236 301 86.5 7.02 140 158 42.2
8.0 37.1 297 385 85.1 8.75 175 201 41.3
10.0 43.8 351 462 83.7 10.2 204 240 40.4
300x150x4.5 46.4 309 380 109 16.0 213 236 64.1
6.0 60.0 400 495 108 20.6 275 307 63.4
8.0 76.8 512 640 107 26.2 350 396 62.5
10.0 92.1 614 776 106 31.3 417 479 61.5
320x220x4.5 70.1 438 519 122 39.7 361 403 91.8
6.0 91.2 570 679 121 51.5 468 527 91.0
8.0 118 735 884 120 66.3 602 685 90.1
10.0 142 888 1080 119 79.9 726 835 89.1
340x200x4.5 75.9 446 537 127 33.8 338 374 84.7
6.0 98.7 581 703 126 43.8 438 490 84.0
8.0 127 749 914 125 56.3 563 636 83.1
10.0 154 905 1110 124 67.8 678 774 82.1

Tubecon prides itself on being one of the leading steel tube and profile manufacturers in Southern Africa with our core line of business being that of cold formed round, square and rectangular mild steel tubes. The following link will divert you to our mild steel tube section under our product range for more information: Mild Steel Tubes

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