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Standard channel steel, often referred to as C-channel or U-channel, is a type of structural steel commonly used in construction and manufacturing industries. It is characterized by its “C” or “U” shape, with a cross-section that resembles a rectangular box with one side open.
| Sec. No. | Weight | Area | Dimensions | Details | Surface Area | |||||||||
| h | b | s | t=r1 | c | h-2c | ey | Xm | W | dmax | Um | Ut | |||
| kg/m` | cm2 | mm | mm | mm | mm | mm | mm | cm | cm | mm | mm | x10-2 m2/m | m2/t | |
| 30×15 | 1.74 | 2.21 | 30 | 15 | 4.0 | 4.5 | 9.0 | 12 | 0.52 | 0.74 | N.A. | N.A. | 7.14 | 41.00 |
| 30 | 4.27 | 5.44 | 30 | 33 | 5.0 | 7.0 | 14.5 | 1 | 1.31 | 2.22 | N.A. | N.A. | 17.40 | 40.74 |
| 40×20 | 2.87 | 3.66 | 40 | 20 | 5.0 | 5.5 | 11.0 | 18 | 0.67 | 1.01 | N.A. | N.A. | 13.71 | 47.77 |
| 40 | 4.87 | 6.21 | 40 | 35 | 5.0 | 7.0 | 14.5 | 11 | 1.33 | 2.32 | N.A. | N.A. | 19.47 | 40.00 |
| 50×25 | 3.86 | 4.92 | 50 | 25 | 5.0 | 6.0 | 12.5 | 25 | 0.81 | 1.34 | N.A. | N.A. | 17.52 | 45.40 |
| 50 | 5.59 | 7.12 | 50 | 38 | 5.0 | 7.0 | 15.0 | 20 | 1.37 | 2.47 | N.A. | N.A. | 22.40 | 40.06 |
| 60 | 5.07 | 6.46 | 60 | 30 | 6.0 | 6.0 | 12.5 | 35 | 0.91 | 1.50 | N.A. | N.A. | 21.32 | 42.06 |
| 65 | 7.09 | 9.03 | 65 | 42 | 5.5 | 7.5 | 16.0 | 33 | 1.42 | 2.60 | 22 | M10 | 27.30 | 38.50 |
| 70 | 6.73 | 8.57 | 70 | 40 | 6.0 | 6.5 | 16.0 | 38 | 1.42 | 2.20 | 22 | M10 | 26.67 | 39.64 |
| 80 | 8.64 | 11.00 | 80 | 45 | 6.0 | 8.0 | 17.0 | 47 | 1.45 | 2.67 | 25 | M12 | 31.20 | 36.10 |
| 100 | 10.60 | 13.50 | 100 | 50 | 6.0 | 8.5 | 18.0 | 64 | 1.55 | 2.93 | 30 | M12 | 37.20 | 35.10 |
| 120 | 13.40 | 17.00 | 120 | 55 | 7.0 | 9.0 | 19.0 | 82 | 1.60 | 3.03 | 30 | M16 | 43.40 | 32.40 |
| 140 | 16.00 | 20.40 | 140 | 60 | 7.0 | 10.0 | 21.0 | 97 | 1.75 | 3.37 | 35 | M16 | 48.90 | 30.60 |
| 160 | 18.80 | 24.00 | 160 | 65 | 7.5 | 10.5 | 22.5 | 116 | 1.84 | 3.56 | 35 | M20 | 54.60 | 29.00 |
| 180 | 22.00 | 28.00 | 180 | 70 | 8.0 | 11.0 | 23.5 | 133 | 1.92 | 3.75 | 40 | M20 | 61.10 | 37.80 |
| 200 | 25.30 | 32.20 | 200 | 75 | 8.5 | 11.5 | 24.5 | 151 | 2.01 | 3.94 | 40 | M20 | 66.10 | 26.10 |
| 220 | 29.40 | 37.40 | 220 | 80 | 9.0 | 12.5 | 26.5 | 166 | 2.14 | 4.20 | 45 | M20 | 71.80 | 24.40 |
| 240 | 33.20 | 42.30 | 240 | 85 | 9.5 | 13.0 | 28.0 | 185 | 2.23 | 4.39 | 45 | M24 | 77.50 | 23.30 |
| 260 | 37.90 | 48.30 | 260 | 90 | 10.0 | 14.0 | 30.0 | 201 | 2.36 | 4.66 | 50 | M24 | 83.40 | 22.00 |
| 280 | 41.80 | 53.30 | 280 | 95 | 10.0 | 15.0 | 32.0 | 213 | 2.53 | 5.02 | 50 | M24 | 89.00 | 21.00 |
| 300 | 46.20 | 58.80 | 300 | 100 | 10.0 | 16.0 | 34.0 | 232 | 2.70 | 5.41 | 55 | M27 | 95.00 | 20.60 |
| 320 | 59.50 | 75.80 | 320 | 100 | 14.0 | 17.5 | 37.0 | 247 | 2.60 | 4.82 | 58 | M27 | 98.20 | 16.50 |
| 350 | 60.60 | 77.30 | 350 | 100 | 14.0 | 16.0 | 34.0 | 283 | 2.40 | 4.45 | 58 | M27 | 105.0 | 17.30 |
| 380 | 63.10 | 80.40 | 380 | 102 | 13.5 | 16.0 | 33.5 | 313 | 2.38 | 4.58 | 60 | M27 | 111.0 | 17.70 |
| 400 | 71.80 | 91.50 | 400 | 110 | 14.0 | 18.0 | 38.0 | 325 | 2.65 | 5.11 | 60 | M27 | 118.0 | 16.50 |
