C - CHANNELS


Taper Flange and Parallel Flange Channels


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.channels.png

Channels (taper flange)(parallel flange)
   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

 

 

Channels (taper flange)(parallel flange) continued
                                                                                                                                        
   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