Parallel flange channels are better known in the market as C-channels. Improvements were made on the taper flanged channel by reducing the linear mass and improving the properties around the y-y-axis during the development of the parallel flange channel. In the pictures below the differences can be seen clearly, the taper flange reduces in thickness closer to the end, while the parallel flange thickness stay consistent right through from the web of the channel till the end of the flange. Even though both are still widely available, the parallel flange was designed as a replacement for the taper flange channel.
The parallel flange channels holds a few advantages over the taper flange channels, including the fact that normal washers can be used, connection is easier, increased load-carrying capacity and so forth.
| m | h | b | tw |
tf |
r1 | r2 | b1 | hw | ß | A | |
| Designation hxb |
kg/m | mm | mm | mm | mm | mm | mm | mm | mm | deg | 10^3mm^2 |
| Taper flange channels | |||||||||||
| C76x38 | 6.70 | 76.2 | 38.1 | 5.1 | 6.8 | 7.6 | 2.4 | 16.5 | 45.8 | 95 | 0.855 |
| C100x50 | 10.7 | 100.0 | 50.0 | 6.0 | 8.5 | 8.5 | 4.5 | 25.6 | 66.0 | 95 | 1.34 |
| C120x55 | 13.5 | 120.0 | 55.0 | 7.0 | 9.0 | 9.0 | 4.5 | 27.5 | 84.0 | 95 | 1.70 |
| C127x64 | 14.9 | 127.0 | 63.5 | 6.4 | 9.2 | 10.7 | 2.4 | 28.5 | 84.0 | 95 | 1.90 |
| C140x60 | 16.2 | 140.0 | 60.0 | 7.0 | 10.0 | 10.0 | 5.0 | 30.0 | 100 | 95 | 2.04 |
| C152x76 | 17.9 | 152.4 | 76.2 | 6.4 | 9.0 | 12.2 | 2.4 | 34.9 | 106 | 95 | 2.28 |
| C160x65 | 19.1 | 160.0 | 65.0 | 7.5 | 10.5 | 10.5 | 5.5 | 32.5 | 118 | 95 | 2.40 |
| C178x54 | 14.5 | 177.8 | 54.0 | 5.8 | 8.3 | 8.3 | 3.2 | 24.1 | 143 | 92 | 1.85 |
| C180x70 | 22.3 | 180 | 70.0 | 8.0 | 11.0 | 11.0 | 5.5 | 35.0 | 136 | 95 | 2.80 |
| C200x75 | 25.3 | 200 | 75.0 | 8.5 | 11.5 | 11.5 | 6.0 | 37.5 | 154 | 95 | 3.22 |
| Parallel flange channels | |||||||||||
| PC100x50 | 10.1 | 100 | 50 | 5.0 | 8.4 | 8.4 | - | - | 66.4 | - | 1.29 |
| PC180x70 | 21.1 | 180 | 70 | 7.0 | 10.9 | 10.9 | - | - | 136 | - | 2.68 |
| PC200x75 | 24.3 | 200 | 75 | 7.5 | 11.4 | 11.4 | - | - | 154 | - | 3.09 |
| PC230x90 | 32.2 | 230 | 90 | 7.5 | 14.0 | 12.0 | - | - | 178 | - | 4.10 |
| PC260x90 | 34.8 | 260 | 90 | 8.0 | 14.0 | 12.0 | - | - | 208 | - | 4.44 |
| PC300x100 | 45.4 | 300 | 100 | 9.0 | 16.5 | 12.0 | - | - | 243 | - | 5.76 |
| ac | ay | I | Ze | r | J | Cw | |
| Designation h*b |
mm | mm | 10^6mm^4 | 10^3mm^3 | mm | 10^3mm^4 | 10^9mm^6 |
| About x-x | |||||||
| Taper flange channels | |||||||
| C76x38 | 23.3 | 11.9 | 0.743 |
19.5 |
29.5 | 12.0 | 0.085 |
| C100x50 | 31.7 | 15.5 | 2.05 | 40.9 | 39.1 | 26.8 | 0.372 |
| C120x55 | 32.7 | 16.1 | 3.64 | 60.7 | 46.3 | 39.7 | 0.826 |
| C127x64 | 40.2 | 19.4 | 4.83 | 76.0 | 50.4 | 47.2 | 1.49 |
| C140x60 | 36.4 | 17.6 | 6.05 | 86.4 | 54.5 | 54.8 | 1.64 |
| C152x76 | 47.8 | 22.1 | 8.51 | 112 | 61.1 | 56.9 | 3.62 |
| C160x65 | 38.5 | 18.4 | 9.25 | 116 | 62.1 | 71.2 | 2.95 |
| C178x54 | 29.3 | 14.2 | 8.60 | 96.8 | 68.1 | 32.8 | 2.29 |
| C180x70 | 40.6 | 19.3 | 13.5 | 150 | 69.6 | 91.1 | 5.06 |
| C200x70 | 42.7 | 20.1 | 19.1 | 191 | 77.1 | 115 | 8.19 |
| Parallel flange channels | |||||||
| PC100x50 | 34.1 | 17.3 | 2.05 | 41.1 | 40.0 | 24.2 | 0.490 |
| PC180x70 | 43.5 | 21.5 | 13.5 | 150 | 71.0 | 82.3 | 6.52 |
| PC200x75 | 45.7 | 22.5 | 19.1 | 191 | 78.6 | 104 | 10.6 |
| PC230x90 | 60.0 | 29.2 | 35.2 | 306 | 92.7 | 193 | 27.9 |
| PC260x90 | 56.6 | 27.4 | 47.3 | 364 | 103 | 206 | 38.0 |
| PC300x100 | 63.1 | 30.6 | 81.7 | 545 | 119 | 358 | 81.0 |
| About y-y | |||||||
| Taper flange channels | |||||||
| C76x38 | 0.107 | 4.09 | 11.2 | 12.0 | 0.085 | ||
| C100X50 | 0.290 | 8.40 | 14.7 | 26.8 | 0.372 | ||
| C120X55 | 0.431 | 11.1 | 15.9 | 39.7 | 0.826 | ||
| C127x64 | 0.672 | 15.2 | 18.8 | 47.2 | 1.49 | ||
| C140x60 | 0.625 | 14.7 | 17.5 | 54.8 | 1.64 | ||
| C152x76 | 1.14 | 21.0 | 22.3 | 56.9 | 3.62 | ||
| C160x65 | 0.851 | 18.3 | 18.8 | 71.2 | 2.95 | ||
| C178x54 | 0.461 | 11.6 | 15.8 | 32.8 | 2.29 | ||
| C180x70 | 1.14 | 22.4 | 20.1 | 91.1 | 5.06 | ||
| C200x75 | 1.48 | 26.9 | 21.4 | 115 | 8.19 | ||
| Parallel flange channels | |||||||
| PC100x50 | 0.320 | 9.79 | 15.8 | 24.2 | 0.490 | ||
| PC180x70 | 1.27 | 26.2 | 21.8 | 82.3 | 6.52 | ||
| PC200x75 | 1.67 | 31.8 | 23.2 | 104 | 10.6 | ||
| PC230x90 | 3.34 | 55.0 | 28.6 | 193 | 27.9 | ||
| PC260x90 | 3.53 | 56.3 | 28.2 | 206 | 38.0 | ||
| PC300x100 | 5.67 | 81.7 | 31.4 | 358 | 81.0 | ||
