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Square Tube Dimension Tolerance Side Lenght : DxB < 50 mm. ± 1.5 mm. Thickness : Under 3 mm. ± 0.3 mm. : DxB > 50 mm. ± 1.5 % Thickness : 3 mm. or over, ± 10% : ± 10% Lenght : +50 mm., -0 mm. |
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| Side Length | Thickness | Calculate Weight | Cross Sectional Area | Geometrical Moment of Inertia | Modulus of Section | Radius of Gyration | |
| D x D | T | W | A | Ix, Iy | Zx, Zy | Ix, Iy | |
| in. | mm. | mm. | kg./m. | cm2 | cm4 | cm3 | cm. |
| 1x1 | 25x25 | 2.0 | 1.36 | 1.74 | 1.48 | 1.19 | 0.92 |
| 2.3 | 1.53 | 1.97 | 1.61 | 1.29 | 0.90 | ||
| 2.6 | 1.65 | 2.10 | 1.63 | 1.31 | 0.88 | ||
| 3.2 | 1.91 | 2.44 | 1.75 | 1.40 | 0.85 | ||
| 11/4 x11/4 | 32x32 | 2.3 | 2.04 | 2.60 | 3.71 | 2.32 | 1.20 |
| 3.2 | 2.69 | 3.42 | 4.54 | 2.84 | 1.15 | ||
| 11/2 x11/2 | 38x38 | 2.3 | 2.47 | 3.15 | 6.54 | 3.44 | 1.44 |
| 3.2 | 3.29 | 4.19 | 8.18 | 4.30 | 1.40 | ||
| 2x2 | 50x50 | 1.6 | 2.38 | 3.03 | 11.70 | 4.68 | 1.96 |
| 2.0 | 2.91 | 3.70 | 13.90 | 5.57 | 1.94 | ||
| 2.3 | 3.34 | 4.25 | 15.90 | 6.34 | 1.93 | ||
| 3.2 | 4.50 | 5.73 | 20.40 | 8.16 | 1.89 | ||
| 3.6 | 4.90 | 6.24 | 21.40 | 8.58 | 1.85 | ||
| 4.0 | 5.35 | 6.81 | 22.90 | 9.15 | 1.83 | ||
| 5.0 | 6.39 | 8.14 | 25.70 | 10.30 | 1.78 | ||
| 3x3 | 75x75 | 2.3 | 5.14 | 6.55 | 57.10 | 15.20 | 2.95 |
| 3.2 | 7.01 | 8.93 | 75.50 | 20.10 | 2.91 | ||
| 4.0 | 8.59 | 10.95 | 90.20 | 24.10 | 2.87 | ||
| 4.5 | 9.55 | 12.17 | 98.60 | 26.30 | 2.85 | ||
| 4x4 | 100x100 | 2.3 | 6.95 | 8.85 | 140.00 | 27.90 | 3.97 |
| 3.2 | 9.52 | 12.13 | 187.00 | 37.50 | 3.93 | ||
| 4.0 | 11.70 | 14.95 | 226.00 | 45.30 | 3.89 | ||
| 4.5 | 13.10 | 16.67 | 249.00 | 49.90 | 3.87 | ||
| 6.0 | 17.00 | 21.63 | 311.00 | 62.30 | 3.79 | ||
| 5x5 | 125x125 | 3.2 | 12.00 | 15.33 | 376.00 | 60.10 | 4.95 |
| 4.5 | 16.60 | 21.17 | 506.00 | 80.90 | 4.89 | ||
| 5.0 | 18.30 | 23.36 | 553.00 | 88.40 | 4.86 | ||
| 6.0 | 21.70 | 27.63 | 641.00 | 103.00 | 4.82 | ||
| 6x6 | 150x150 | 4.5 | 20.10 | 25.67 | 896.00 | 120.00 | 5.91 |
| 5.0 | 22.30 | 28.36 | 982.00 | 131.00 | 5.89 | ||
| 6.0 | 26.40 | 33.63 | 1,150.00 | 153.00 | 5.84 | ||
| 6.3 | 27.40 | 34.80 | 1,174.00 | 156.00 | 5.80 | ||