# C channels (AISC American Standard channels): C6x13, C8x11.5, C12x20.7 dimensions + STEP/STL

> What are the dimensions of a C6x13 channel?

- Category: Hardware › Framing
- Kind: Standard part
- Basis: AISC Shapes Database (v15.0 values): d, bf, tw, tf, k for every C shape; 2:12 inner flange slope
- Page: https://xemstudio.com/objects/aisc-c-channels/ · JSON: https://xemstudio.com/api/geometry?object=aisc-c-channels · Plain text: https://xemstudio.com/objects/aisc-c-channels/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length |
|---|
| 101.6 |

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- C shapes are the American Standard channels: C6x13 is about 6 in deep and 13 lb per foot. The inner flange faces slope about 17 % (2 in 12 in), and tf in the table is the mean flange thickness.
- Files draw the 2:12 slope (quoted on draftsperson.net; the AISC page itself was not readable here), with tf at the middle of the flange, a derived root radius from the printed k, and square flange tips (no toe radius is printed).
- Files are 4 in (101.6 mm) long extrusions along X; the section is in the YZ plane, back of the web on y = 0, flanges toward +y, with z = 0 on the bottom face.
- 19 of the 32 C sizes have files; all sizes are in the table. Drawn area is within 3 % of the printed area on all of them.
- MC (miscellaneous) channels, with other proportions, are on aisc-mc-channels.

## Sizes

| shape | lb/ft | d (in) | bf (in) | tw (in) | tf mean (in) | k (in) | d (mm) | bf (mm) | tw (mm) | tf (mm) |
|---|---|---|---|---|---|---|---|---|---|---|
| C15x50 | 50.0 | 15.0 | 3.72 | 0.716 | 0.65 | 1.44 | 381.0 | 94.5 | 18.19 | 16.51 |
| C15x40 | 40.0 | 15.0 | 3.52 | 0.52 | 0.65 | 1.44 | 381.0 | 89.4 | 13.21 | 16.51 |
| C15x33.9 | 33.9 | 15.0 | 3.4 | 0.4 | 0.65 | 1.44 | 381.0 | 86.4 | 10.16 | 16.51 |
| C12x30 | 30.0 | 12.0 | 3.17 | 0.51 | 0.501 | 1.13 | 304.8 | 80.5 | 12.95 | 12.73 |
| C12x25 | 25.0 | 12.0 | 3.05 | 0.387 | 0.501 | 1.13 | 304.8 | 77.5 | 9.83 | 12.73 |
| C12x20.7 | 20.7 | 12.0 | 2.94 | 0.282 | 0.501 | 1.13 | 304.8 | 74.7 | 7.16 | 12.73 |
| C10x30 | 30.0 | 10.0 | 3.03 | 0.673 | 0.436 | 1.0 | 254.0 | 77.0 | 17.09 | 11.07 |
| C10x25 | 25.0 | 10.0 | 2.89 | 0.526 | 0.436 | 1.0 | 254.0 | 73.4 | 13.36 | 11.07 |
| C10x20 | 20.0 | 10.0 | 2.74 | 0.379 | 0.436 | 1.0 | 254.0 | 69.6 | 9.63 | 11.07 |
| C10x15.3 | 15.3 | 10.0 | 2.6 | 0.24 | 0.436 | 1.0 | 254.0 | 66.0 | 6.1 | 11.07 |
| C9x20 | 20.0 | 9.0 | 2.65 | 0.448 | 0.413 | 1.0 | 228.6 | 67.3 | 11.38 | 10.49 |
| C9x15 | 15.0 | 9.0 | 2.49 | 0.285 | 0.413 | 1.0 | 228.6 | 63.2 | 7.24 | 10.49 |
| C9x13.4 | 13.4 | 9.0 | 2.43 | 0.233 | 0.413 | 1.0 | 228.6 | 61.7 | 5.92 | 10.49 |
| C8x18.75 | 18.75 | 8.0 | 2.53 | 0.487 | 0.39 | 0.938 | 203.2 | 64.3 | 12.37 | 9.91 |
| C8x13.75 | 13.75 | 8.0 | 2.34 | 0.303 | 0.39 | 0.938 | 203.2 | 59.4 | 7.7 | 9.91 |
| C8x11.5 | 11.5 | 8.0 | 2.26 | 0.22 | 0.39 | 0.938 | 203.2 | 57.4 | 5.59 | 9.91 |
| C7x14.75 | 14.75 | 7.0 | 2.3 | 0.419 | 0.366 | 0.875 | 177.8 | 58.4 | 10.64 | 9.3 |
| C7x12.25 | 12.25 | 7.0 | 2.19 | 0.314 | 0.366 | 0.875 | 177.8 | 55.6 | 7.98 | 9.3 |
| C7x9.8 | 9.8 | 7.0 | 2.09 | 0.21 | 0.366 | 0.875 | 177.8 | 53.1 | 5.33 | 9.3 |
| C6x13 | 13.0 | 6.0 | 2.16 | 0.437 | 0.343 | 0.813 | 152.4 | 54.9 | 11.1 | 8.71 |
| C6x10.5 | 10.5 | 6.0 | 2.03 | 0.314 | 0.343 | 0.813 | 152.4 | 51.6 | 7.98 | 8.71 |
| C6x8.2 | 8.2 | 6.0 | 1.92 | 0.2 | 0.343 | 0.813 | 152.4 | 48.8 | 5.08 | 8.71 |
| C5x9 | 9.0 | 5.0 | 1.89 | 0.325 | 0.32 | 0.75 | 127.0 | 48.0 | 8.25 | 8.13 |
| C5x6.7 | 6.7 | 5.0 | 1.75 | 0.19 | 0.32 | 0.75 | 127.0 | 44.4 | 4.83 | 8.13 |
| C4x7.25 | 7.25 | 4.0 | 1.72 | 0.321 | 0.296 | 0.75 | 101.6 | 43.7 | 8.15 | 7.52 |
| C4x6.25 | 6.25 | 4.0 | 1.65 | 0.247 | 0.296 | 0.75 | 101.6 | 41.9 | 6.27 | 7.52 |
| C4x5.4 | 5.4 | 4.0 | 1.58 | 0.184 | 0.296 | 0.75 | 101.6 | 40.1 | 4.67 | 7.52 |
| C4x4.5 | 4.5 | 4.0 | 1.52 | 0.125 | 0.296 | 0.75 | 101.6 | 38.6 | 3.17 | 7.52 |
| C3x6 | 6.0 | 3.0 | 1.6 | 0.356 | 0.273 | 0.688 | 76.2 | 40.6 | 9.04 | 6.93 |
| C3x5 | 5.0 | 3.0 | 1.5 | 0.258 | 0.273 | 0.688 | 76.2 | 38.1 | 6.55 | 6.93 |
| C3x4.1 | 4.1 | 3.0 | 1.41 | 0.17 | 0.273 | 0.688 | 76.2 | 35.8 | 4.32 | 6.93 |
| C3x3.5 | 3.5 | 3.0 | 1.37 | 0.132 | 0.273 | 0.688 | 76.2 | 34.8 | 3.35 | 6.93 |

## Where the files are

- AISC (values via the ambaker1/aisc-csv extract, MIT): [AISC Shapes Database v15.0 (W, S, C, MC, L, HSS): d, bf, tw, tf, k, t, HSS Ht, B, OD, tnom, tdes, A, weight](https://github.com/ambaker1/aisc-csv) — web — AISC publishes the database free of charge; dimensions are facts. aisc.org itself was not reachable from the build box
- AISC: [Shapes Database (free download, v16.0 on aisc.org) - the values here are the v15.0 release; check the current release before relying on a size](https://www.aisc.org/publications/steel-construction-manual-resources/) — web — Publisher's page; dimensions are facts
- draftsperson.net: [Steel shapes and sizes: American Standard beams (S) and channels (C) have a slope of approximately 17 percent (2 in 12 in) on the inner flange surfaces](https://blog.draftsperson.net/steel-shapes-and-sizes/) — web — Publisher's page; dimensions are facts

## Free STEP/STL (19 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/aisc-c-channels/index.json

- c3x4-1-4in: [STEP](https://xemstudio.com/files/hardware/aisc-c-channels/c3x4-1-4in.step) · [STL](https://xemstudio.com/files/hardware/aisc-c-channels/c3x4-1-4in.stl) — C3 x 4.1 channel: depth 3.0 in (76.2 mm), flange 1.41 in (35.8 mm), web 0.17 in, mean flange 0.273 in, flanges sloped 2 in 12 in, 4 in long
- c3x6-4in: [STEP](https://xemstudio.com/files/hardware/aisc-c-channels/c3x6-4in.step) · [STL](https://xemstudio.com/files/hardware/aisc-c-channels/c3x6-4in.stl) — C3 x 6 channel: depth 3.0 in (76.2 mm), flange 1.6 in (40.6 mm), web 0.356 in, mean flange 0.273 in, flanges sloped 2 in 12 in, 4 in long
- c4x5-4-4in: [STEP](https://xemstudio.com/files/hardware/aisc-c-channels/c4x5-4-4in.step) · [STL](https://xemstudio.com/files/hardware/aisc-c-channels/c4x5-4-4in.stl) — C4 x 5.4 channel: depth 4.0 in (101.6 mm), flange 1.58 in (40.1 mm), web 0.184 in, mean flange 0.296 in, flanges sloped 2 in 12 in, 4 in long
- c4x7-25-4in: [STEP](https://xemstudio.com/files/hardware/aisc-c-channels/c4x7-25-4in.step) · [STL](https://xemstudio.com/files/hardware/aisc-c-channels/c4x7-25-4in.stl) — C4 x 7.25 channel: depth 4.0 in (101.6 mm), flange 1.72 in (43.7 mm), web 0.321 in, mean flange 0.296 in, flanges sloped 2 in 12 in, 4 in long
- c5x6-7-4in: [STEP](https://xemstudio.com/files/hardware/aisc-c-channels/c5x6-7-4in.step) · [STL](https://xemstudio.com/files/hardware/aisc-c-channels/c5x6-7-4in.stl) — C5 x 6.7 channel: depth 5.0 in (127.0 mm), flange 1.75 in (44.4 mm), web 0.19 in, mean flange 0.32 in, flanges sloped 2 in 12 in, 4 in long
- c5x9-4in: [STEP](https://xemstudio.com/files/hardware/aisc-c-channels/c5x9-4in.step) · [STL](https://xemstudio.com/files/hardware/aisc-c-channels/c5x9-4in.stl) — C5 x 9 channel: depth 5.0 in (127.0 mm), flange 1.89 in (48.0 mm), web 0.325 in, mean flange 0.32 in, flanges sloped 2 in 12 in, 4 in long
- c6x8-2-4in: [STEP](https://xemstudio.com/files/hardware/aisc-c-channels/c6x8-2-4in.step) · [STL](https://xemstudio.com/files/hardware/aisc-c-channels/c6x8-2-4in.stl) — C6 x 8.2 channel: depth 6.0 in (152.4 mm), flange 1.92 in (48.8 mm), web 0.2 in, mean flange 0.343 in, flanges sloped 2 in 12 in, 4 in long
- c6x13-4in: [STEP](https://xemstudio.com/files/hardware/aisc-c-channels/c6x13-4in.step) · [STL](https://xemstudio.com/files/hardware/aisc-c-channels/c6x13-4in.stl) — C6 x 13 channel: depth 6.0 in (152.4 mm), flange 2.16 in (54.9 mm), web 0.437 in, mean flange 0.343 in, flanges sloped 2 in 12 in, 4 in long
- c7x9-8-4in: [STEP](https://xemstudio.com/files/hardware/aisc-c-channels/c7x9-8-4in.step) · [STL](https://xemstudio.com/files/hardware/aisc-c-channels/c7x9-8-4in.stl) — C7 x 9.8 channel: depth 7.0 in (177.8 mm), flange 2.09 in (53.1 mm), web 0.21 in, mean flange 0.366 in, flanges sloped 2 in 12 in, 4 in long
- c7x14-75-4in: [STEP](https://xemstudio.com/files/hardware/aisc-c-channels/c7x14-75-4in.step) · [STL](https://xemstudio.com/files/hardware/aisc-c-channels/c7x14-75-4in.stl) — C7 x 14.75 channel: depth 7.0 in (177.8 mm), flange 2.3 in (58.4 mm), web 0.419 in, mean flange 0.366 in, flanges sloped 2 in 12 in, 4 in long
- c8x11-5-4in: [STEP](https://xemstudio.com/files/hardware/aisc-c-channels/c8x11-5-4in.step) · [STL](https://xemstudio.com/files/hardware/aisc-c-channels/c8x11-5-4in.stl) — C8 x 11.5 channel: depth 8.0 in (203.2 mm), flange 2.26 in (57.4 mm), web 0.22 in, mean flange 0.39 in, flanges sloped 2 in 12 in, 4 in long
- c8x18-75-4in: [STEP](https://xemstudio.com/files/hardware/aisc-c-channels/c8x18-75-4in.step) · [STL](https://xemstudio.com/files/hardware/aisc-c-channels/c8x18-75-4in.stl) — C8 x 18.75 channel: depth 8.0 in (203.2 mm), flange 2.53 in (64.3 mm), web 0.487 in, mean flange 0.39 in, flanges sloped 2 in 12 in, 4 in long
- c9x15-4in: [STEP](https://xemstudio.com/files/hardware/aisc-c-channels/c9x15-4in.step) · [STL](https://xemstudio.com/files/hardware/aisc-c-channels/c9x15-4in.stl) — C9 x 15 channel: depth 9.0 in (228.6 mm), flange 2.49 in (63.2 mm), web 0.285 in, mean flange 0.413 in, flanges sloped 2 in 12 in, 4 in long
- c10x15-3-4in: [STEP](https://xemstudio.com/files/hardware/aisc-c-channels/c10x15-3-4in.step) · [STL](https://xemstudio.com/files/hardware/aisc-c-channels/c10x15-3-4in.stl) — C10 x 15.3 channel: depth 10.0 in (254.0 mm), flange 2.6 in (66.0 mm), web 0.24 in, mean flange 0.436 in, flanges sloped 2 in 12 in, 4 in long
- c10x30-4in: [STEP](https://xemstudio.com/files/hardware/aisc-c-channels/c10x30-4in.step) · [STL](https://xemstudio.com/files/hardware/aisc-c-channels/c10x30-4in.stl) — C10 x 30 channel: depth 10.0 in (254.0 mm), flange 3.03 in (77.0 mm), web 0.673 in, mean flange 0.436 in, flanges sloped 2 in 12 in, 4 in long
- c12x20-7-4in: [STEP](https://xemstudio.com/files/hardware/aisc-c-channels/c12x20-7-4in.step) · [STL](https://xemstudio.com/files/hardware/aisc-c-channels/c12x20-7-4in.stl) — C12 x 20.7 channel: depth 12.0 in (304.8 mm), flange 2.94 in (74.7 mm), web 0.282 in, mean flange 0.501 in, flanges sloped 2 in 12 in, 4 in long
- c12x30-4in: [STEP](https://xemstudio.com/files/hardware/aisc-c-channels/c12x30-4in.step) · [STL](https://xemstudio.com/files/hardware/aisc-c-channels/c12x30-4in.stl) — C12 x 30 channel: depth 12.0 in (304.8 mm), flange 3.17 in (80.5 mm), web 0.51 in, mean flange 0.501 in, flanges sloped 2 in 12 in, 4 in long
- c15x33-9-4in: [STEP](https://xemstudio.com/files/hardware/aisc-c-channels/c15x33-9-4in.step) · [STL](https://xemstudio.com/files/hardware/aisc-c-channels/c15x33-9-4in.stl) — C15 x 33.9 channel: depth 15.0 in (381.0 mm), flange 3.4 in (86.4 mm), web 0.4 in, mean flange 0.65 in, flanges sloped 2 in 12 in, 4 in long
- c15x50-4in: [STEP](https://xemstudio.com/files/hardware/aisc-c-channels/c15x50-4in.step) · [STL](https://xemstudio.com/files/hardware/aisc-c-channels/c15x50-4in.stl) — C15 x 50 channel: depth 15.0 in (381.0 mm), flange 3.72 in (94.5 mm), web 0.716 in, mean flange 0.65 in, flanges sloped 2 in 12 in, 4 in long

## Questions

**What is the web thickness of a C6x13?**

0.437 in (11.1 mm) per the AISC database; flange width 2.16 in.

**What does C6x13 mean?**

A channel about 6 in deep weighing 13 lb per foot.

## Fits with

- [MC channels (AISC miscellaneous channels): MC6x12, MC8x8.5, MC12x31 dimensions + STEP/STL](https://xemstudio.com/objects/aisc-mc-channels/)
- [W shapes (AISC wide-flange beams): W8x10, W12x26, W14x90 dimensions + STEP/STL](https://xemstudio.com/objects/aisc-w-shapes/)
- [S shapes (AISC American Standard beams): S6x12.5, S12x31.8 dimensions + STEP/STL](https://xemstudio.com/objects/aisc-s-shapes/)
- [Strut channel, 1-5/8 in (Unistrut / B-Line): profile, lips, slots and hole patterns](https://xemstudio.com/objects/strut-channel-1-5-8/)
- [UPN channels (DIN 1026): UPN 50 to UPN 300 dimensions (h, b, tw, tf, r1, r2) + STEP/STL](https://xemstudio.com/objects/din-upn-channels/)