C channels (AISC American Standard channels): C6x13, C8x11.5, C12x20.7 dimensions + STEP/STL — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/aisc-c-channels/ (sheet CC BY 4.0) Basis: AISC Shapes Database (v15.0 values): d, bf, tw, tf, k for every C shape; 2:12 inner flange slope Catalog version: 2026-10-20 Overall (mm): length 101.6 - 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. 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 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - 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 — web — AISC publishes the database free of charge; dimensions are facts. aisc.org itself was not reachable from the build box — https://github.com/ambaker1/aisc-csv - 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 — web — Publisher's page; dimensions are facts — https://www.aisc.org/publications/steel-construction-manual-resources/ - 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 — web — Publisher's page; dimensions are facts — https://blog.draftsperson.net/steel-shapes-and-sizes/ Free files (CC BY 4.0, Xem Studio; STEP + STL, 19 parts): https://xemstudio.com/files/hardware/aisc-c-channels/index.json API: https://xemstudio.com/api/geometry?object=aisc-c-channels