Dimensions - C: Standard Channels
Welcome to our Standard Channels dimension page. Here you'll find the full geometric data for every Canadian C-shape — depth, flange width, web and flange thickness, and fillet radii — sourced from the CISC Structural Section Tables (CISC 12). Sort the table by any column to find the shape you need, then click through to a designation to download its CAD block.
| Designation (metric) | Designation (imperial) | Depth of section (mm) | Width of section (mm) | Flange thickness (mm) | Web thickness (mm) | Fillet ref: outer flange face to web-toe of fillet (mm) | Flange taper slope | Mass per length (kg/ | Weight per length (imperial) (lb/ | Theoretical cross-sectional area (mm^2) |
|---|---|---|---|---|---|---|---|---|---|---|
| Ds_m | Ds_i | D | B | T | W | K | Slp | Mass | Wt_i | A_Th |
| C380x74 | C15x50 | 381 | 94 | 16.5 | 18.2 | 36 | 0.167 | 74 | 50 | 9480 |
| C380x60 | C15x40 | 381 | 89 | 16.5 | 13.2 | 36 | 0.167 | 60 | 40 | 7570 |
| C380x50 | C15x33.9 | 381 | 86 | 16.5 | 10.2 | 36 | 0.167 | 50 | 33.9 | 6430 |
| C310x45 | C12x30 | 305 | 80 | 12.7 | 13 | 30 | 0.167 | 45 | 30 | 5690 |
| C310x37 | C12x25 | 305 | 77 | 12.7 | 9.8 | 30 | 0.167 | 37 | 25 | 4720 |
| C310x31 | C12x20.7 | 305 | 74 | 12.7 | 7.2 | 30 | 0.167 | 31 | 20.7 | 3920 |
| C250x45 | C10x30 | 254 | 76 | 11.1 | 17.1 | 28 | 0.167 | 45 | 30 | 5670 |
| C250x37 | C10x25 | 254 | 73 | 11.1 | 13.4 | 28 | 0.167 | 37 | 25 | 4750 |
| C250x30 | C10x20 | 254 | 69 | 11.1 | 9.6 | 28 | 0.167 | 30 | 20 | 3780 |
| C250x23 | C10x15.3 | 254 | 65 | 11.1 | 6.1 | 28 | 0.167 | 23 | 15.3 | 2880 |
| C230x30 | C9x20 | 229 | 67 | 10.5 | 11.4 | 24 | 0.167 | 30 | 20 | 3800 |
| C230x22 | C9x15 | 229 | 63 | 10.5 | 7.2 | 24 | 0.167 | 22 | 15 | 2840 |
| C230x20 | C9x13.4 | 229 | 61 | 10.5 | 5.9 | 24 | 0.167 | 20 | 13.4 | 2530 |
| C200x28 | C8x18.75 | 203 | 64 | 9.9 | 12.4 | 22 | 0.167 | 28 | 18.75 | 3560 |
| C200x21 | C8x13.75 | 203 | 59 | 9.9 | 7.7 | 22 | 0.167 | 21 | 13.75 | 2600 |
| C200x17 | C8x11.5 | 203 | 57 | 9.9 | 5.6 | 22 | 0.167 | 17 | 11.5 | 2170 |
| C180x22 | C7x14.75 | 178 | 58 | 9.3 | 10.6 | 21 | 0.167 | 22 | 14.75 | 2780 |
| C180x18 | C7x12.25 | 178 | 55 | 9.3 | 8 | 21 | 0.167 | 18 | 12.25 | 2310 |
| C180x15 | C7x9.8 | 178 | 53 | 9.3 | 5.3 | 21 | 0.167 | 15 | 9.8 | 1850 |
| C150x19 | C6x13 | 152 | 54 | 8.7 | 11.1 | 21 | 0.167 | 19 | 13 | 2450 |
| C150x16 | C6x10.5 | 152 | 51 | 8.7 | 8 | 21 | 0.167 | 16 | 10.5 | 1980 |
| C150x12 | C6x8.2 | 152 | 48 | 8.7 | 5.1 | 21 | 0.167 | 12 | 8.2 | 1530 |
| C130x13 | C5x9 | 127 | 47 | 8.1 | 8.3 | 19 | 0.167 | 13 | 9 | 1690 |
| C130x10 | C5x6.7 | 127 | 44 | 8.1 | 4.8 | 19 | 0.167 | 10 | 6.7 | 1260 |
| C100x11 | C4x7.25 | 102 | 43 | 7.5 | 8.2 | 17 | 0.167 | 11 | 7.25 | 1370 |
| C100x9 | C4x6.25 | 102 | 42 | 7.5 | 6.3 | 17 | 0.167 | 9 | 6.25 | 1190 |
| C100x8 | C4x5.4 | 102 | 40 | 7.5 | 4.7 | 17 | 0.167 | 8 | 5.4 | 1020 |
| C100x7 | C4x4.5 | 102 | 39 | 7.5 | 3.2 | 17 | 0.167 | 7 | 4.5 | 877 |
| C75x9 | C3x6 | 76 | 40 | 6.9 | 9 | 16 | 0.167 | 9 | 6 | 1120 |
| C75x7 | C3x5 | 76 | 37 | 6.9 | 6.6 | 16 | 0.167 | 7 | 5 | 934 |
| C75x6 | C3x4.1 | 76 | 35 | 6.9 | 4.3 | 16 | 0.167 | 6 | 4.1 | 763 |
| C75x5 | C3x3.5 | 76 | 35 | 6.9 | 3.4 | 16 | 0.167 | 5 | 3.5 | 707 |