Square hollow sections or square tubes are cold formed and welded from either hot rolled, cold rolled, pre-galvanized or stainless steel.
In order to form the square 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 square hollow section. This is all done inline. For example: A round tube with an outside diameter of 50.8 is pressed into a 40x40 square tube.
Square and rectangular steel tubes have the advantage of being stronger in bending while a round hollow sections has more stiffness in twisting.
Square Hollow Section Moment of Inertia Calculator
B: mm
H: mm
b: mm
h: mm
Enter values above to calculate Moment of inertia
|
Designation |
m | A | I | Ze | Zpl | r | J |
| mm | kg/m | 10^3mm^2 | 10^6mm^4 | 10^3mm^3 | 10^3mm^3 | mm | 10^6mm^4 |
| 50x50x3.0 | 4.48 | 0.533 | 0.190 | 7.59 | 9.17 | 18.9 | 0.322 |
| 3.5 | 5.18 | 0.6098 | 0.211 | 8.43 | 10.3 | 18.6 | 0.364 |
| 4.0 | 5.87 | 0.681 | 0.229 | 9.15 | 11.4 | 18.3 | 0.403 |
| 4.5 | 6.55 | 0.750 | 0.244 | 9.77 | 12.3 | 18.0 | 0.438 |
| 60x60x3.0 | 5.42 | 0.653 | 0.344 | 11.5 | 13.7 | 23.0 | 0.573 |
| 3.5 | 6.28 | 0.749 | 0.386 | 12.9 | 15.5 | 22.7 | 0.652 |
| 4.0 | 7.12 | 0.841 | 0.423 | 14.1 | 17.2 | 22.4 | 0.727 |
| 4.5 | 7.96 | 0.929 | 0.256 | 15.2 | 18.8 | 22.2 | 0.796 |
| 63x63x3.0 | 5.70 | 0.689 | 0.403 | 12.8 | 15.3 | 24.2 | 0.668 |
| 3.5 | 6.60 | 0.791 | 0.453 | 14.4 | 17.3 | 23.9 | 0.761 |
| 4.0 | 7.50 | 0.889 | 0.498 | 15.8 | 19.2 | 23.7 | 0.850 |
| 4.5 | 8.38 | 0.984 | 0.538 | 17.1 | 21.0 | 23.4 | 0.932 |
| 75x75x3.0 | 6.81 | 0.833 | 0.705 | 18.8 | 22.2 | 29.1 | 1.15 |
| 3.5 | 7.90 | 0.959 | 0.797 | 21.3 | 25.3 | 28.8 | 1.32 |
| 4.0 | 8.98 | 1.08 | 0.882 | 23.5 | 28.2 | 28.6 | 1.48 |
| 4.5 | 10.0 | 1.20 | 0.961 | 25.6 | 31.0 | 28.3 | 1.63 |
| 5.0 | 11.1 | 1.31 | 1.03 | 27.5 | 33.6 | 28.0 | 1.77 |
| 100x100x3.0 | 9.17 | 1.13 | 1.75 | 35.0 | 40.8 | 39.3 | 2.80 |
| 3.5 | 10.7 | 1.31 | 2.00 | 39.9 | 46.8 | 39.1 | 3.22 |
| 4.0 | 12.1 | 1.48 | 2.23 | 44.6 | 52.6 | 38.8 | 3.63 |
| 4.5 | 13.6 | 1.65 | 2.45 | 49.0 | 58.2 | 38.5 | 4.03 |
| 5.0 | 15.0 | 1.81 | 2.66 | 53.1 | 63.5 | 38.3 | 4.42 |
| 6.0 | 17.9 | 2.13 | 3.04 | 60.7 | 73.5 | 37.7 | 5.15 |
| 120x120x3.0 | 11.1 | 1.37 | 3.10 | 51.6 | 59.8 | 47.5 | 4.89 |
| 3.5 | 12.9 | 1.59 | 3.54 | 59.1 | 68.8 | 47.2 | 5.65 |
| 4.0 | 14.6 | 1.80 | 3.97 | 66.2 | 77.5 | 47.0 | 6.39 |
| 4.5 | 16.4 | 2.01 | 4.38 | 73.1 | 86.0 | 46.7 | 7.11 |
| 5.0 | 18.2 | 2.21 | 4.78 | 79.6 | 94.2 | 46.4 | 7.82 |
| 6.0 | 21.7 | 2.61 | 5.51 | 91.8 | 110 | 45.9 | 9.16 |
| 152x152x3.5 | 16.3 | 2.04 | 7.41 | 97.4 | 113 | 60.3 | 11.7 |
| 4.5 | 21.0 | 2.59 | 9.24 | 122 | 142 | 59.8 | 14.8 |
| 6.0 | 27.8 | 3.33 | 11.3 | 150 | 178 | 58.2 | 18.4 |
| 8.0 | 36.6 | 4.39 | 14.7 | 194 | 233 | 58.0 | 24.6 |
| 10.0 | 45.3 | 5.34 | 17.3 | 227 | 277 | 56.9 | 29.6 |
| 180x180x4.5 | 23.8 | 3.09 | 15.7 | 174 | 202 | 71.2 | 24.8 |
| 6.0 | 31.5 | 4.05 | 20.1 | 223 | 262 | 70.5 | 32.4 |
| 8.0 | 41.6 | 5.28 | 25.5 | 283 | 336 | 69.4 | 41.9 |
| 10.0 | 51.6 | 6.46 | 30.2 | 335 | 404 | 68.4 | 50.7 |
| 225x225x4.5 | 29.8 | 3.90 | 31.3 | 278 | 320 | 89.6 | 49.0 |
| 6.0 | 39.5 | 5.13 | 40.5 | 360 | 418 | 88.8 | 64.3 |
| 8.0 | 52.3 | 6.72 | 51.8 | 461 | 541 | 87.8 | 83.8 |
| 10.0 | 64.9 | 8.26 | 62.2 | 553 | 656 | 86.8 | 102 |
| 250x250x4.5 | 34.8 | 4.35 | 43.3 | 347 | 398 | 99.8 | 67.5 |
| 6.0 | 46.2 | 5.73 | 56.2 | 450 | 521 | 99.0 | 88.7 |
| 8.0 | 61.2 | 7.52 | 72.3 | 578 | 676 | 98.0 | 116 |
| 10.0 | 76.0 | 9.26 | 87.1 | 697 | 822 | 97.0 | 142 |
| 270x270x4.5 | 35.5 | 4.71 | 54.9 | 407 | 467 | 108 | 85.3 |
| 6.0 | 47.1 | 6.21 | 71.4 | 529 | 611 | 107 | 112 |
| 8.0 | 62.3 | 8.16 | 92.1 | 682 | 795 | 106 | 147 |
| 10.0 | 77.4 | 10.1 | 111 | 824 | 969 | 105 | 180 |
| 300x300x4.5 | 39.0 | 5.25 | 75.9 | 506 | 579 | 120 | 118 |
| 6.0 | 51.8 | 6.93 | 98.9 | 660 | 760 | 119 | 155 |
| 8.0 | 68.7 | 9.12 | 128 | 853 | 991 | 118 | 203 |
| 10.0 | 85.3 | 11.3 | 155 | 1030 | 1210 | 117 | 250 | a
