MC channels (AISC miscellaneous channels): MC6x12, MC8x8.5, MC12x31 dimensions + STEP/STL — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/aisc-mc-channels/ (sheet CC BY 4.0) Basis: AISC Shapes Database (v15.0 values): d, bf, tw, tf, k for every MC shape Catalog version: 2026-10-20 Overall (mm): length 101.6 - MC shapes are 'miscellaneous' channels: deeper than a C of the same weight in some sizes and with different flange proportions. MC12x31 is about 12 in deep, 31 lb per foot. - A flange slope for MC shapes is not stated in any page we could read, so the MC files are drawn with parallel flanges of the tabulated thickness, root radius r = k - tf from the printed k, and square tips. Where an MC flange is really tapered the drawn section differs slightly; the drawn area is within 5 % of the printed area on all of them. - 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. - 12 of the 40 MC sizes have files; all sizes are in the table. shape lb/ft d (in) bf (in) tw (in) tf (in) k (in) d (mm) bf (mm) tw (mm) tf (mm) MC18x58 58.0 18.0 4.2 0.7 0.625 1.44 457.2 106.7 17.78 15.88 MC18x51.9 51.9 18.0 4.1 0.6 0.625 1.44 457.2 104.1 15.24 15.88 MC18x45.8 45.8 18.0 4.0 0.5 0.625 1.44 457.2 101.6 12.7 15.88 MC18x42.7 42.7 18.0 3.95 0.45 0.625 1.44 457.2 100.3 11.43 15.88 MC13x50 50.0 13.0 4.41 0.787 0.61 1.44 330.2 112.0 19.99 15.49 MC13x40 40.0 13.0 4.19 0.56 0.61 1.44 330.2 106.4 14.22 15.49 MC13x35 35.0 13.0 4.07 0.447 0.61 1.44 330.2 103.4 11.35 15.49 MC13x31.8 31.8 13.0 4.0 0.375 0.61 1.44 330.2 101.6 9.52 15.49 MC12x50 50.0 12.0 4.14 0.835 0.7 1.31 304.8 105.2 21.21 17.78 MC12x45 45.0 12.0 4.01 0.71 0.7 1.31 304.8 101.9 18.03 17.78 MC12x40 40.0 12.0 3.89 0.59 0.7 1.31 304.8 98.8 14.99 17.78 MC12x35 35.0 12.0 3.77 0.465 0.7 1.31 304.8 95.8 11.81 17.78 MC12x31 31.0 12.0 3.67 0.37 0.7 1.31 304.8 93.2 9.4 17.78 MC12x14.3 14.3 12.0 2.12 0.25 0.313 0.75 304.8 53.8 6.35 7.95 MC12x10.6 10.6 12.0 1.5 0.19 0.309 0.75 304.8 38.1 4.83 7.85 MC10x41.1 41.1 10.0 4.32 0.796 0.575 1.31 254.0 109.7 20.22 14.6 MC10x33.6 33.6 10.0 4.1 0.575 0.575 1.31 254.0 104.1 14.6 14.6 MC10x28.5 28.5 10.0 3.95 0.425 0.575 1.31 254.0 100.3 10.79 14.6 MC10x25 25.0 10.0 3.41 0.38 0.575 1.31 254.0 86.6 9.65 14.6 MC10x22 22.0 10.0 3.32 0.29 0.575 1.31 254.0 84.3 7.37 14.6 MC10x8.4 8.4 10.0 1.5 0.17 0.28 0.75 254.0 38.1 4.32 7.11 MC10x6.5 6.5 10.0 1.17 0.152 0.202 0.563 254.0 29.7 3.86 5.13 MC9x25.4 25.4 9.0 3.5 0.45 0.55 1.25 228.6 88.9 11.43 13.97 MC9x23.9 23.9 9.0 3.45 0.4 0.55 1.25 228.6 87.6 10.16 13.97 MC8x22.8 22.8 8.0 3.5 0.427 0.525 1.19 203.2 88.9 10.85 13.33 MC8x21.4 21.4 8.0 3.45 0.375 0.525 1.19 203.2 87.6 9.52 13.33 MC8x20 20.0 8.0 3.03 0.4 0.5 1.13 203.2 77.0 10.16 12.7 MC8x18.7 18.7 8.0 2.98 0.353 0.5 1.13 203.2 75.7 8.97 12.7 MC8x8.5 8.5 8.0 1.87 0.179 0.311 0.813 203.2 47.5 4.55 7.9 MC7x22.7 22.7 7.0 3.6 0.503 0.5 1.13 177.8 91.4 12.78 12.7 MC7x19.1 19.1 7.0 3.45 0.352 0.5 1.13 177.8 87.6 8.94 12.7 MC6x18 18.0 6.0 3.5 0.379 0.475 1.06 152.4 88.9 9.63 12.06 MC6x15.3 15.3 6.0 3.5 0.34 0.385 0.875 152.4 88.9 8.64 9.78 MC6x16.3 16.3 6.0 3.0 0.375 0.475 1.06 152.4 76.2 9.52 12.06 MC6x15.1 15.1 6.0 2.94 0.316 0.475 1.06 152.4 74.7 8.03 12.06 MC6x12 12.0 6.0 2.5 0.31 0.375 0.875 152.4 63.5 7.87 9.52 MC6x7 7.0 6.0 1.88 0.179 0.291 0.75 152.4 47.8 4.55 7.39 MC6x6.5 6.5 6.0 1.85 0.155 0.291 0.75 152.4 47.0 3.94 7.39 MC4x13.8 13.8 4.0 2.5 0.5 0.5 1.0 101.6 63.5 12.7 12.7 MC3x7.1 7.1 3.0 1.94 0.312 0.351 0.813 76.2 49.3 7.92 8.92 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/ Free files (CC BY 4.0, Xem Studio; STEP + STL, 12 parts): https://xemstudio.com/files/hardware/aisc-mc-channels/index.json API: https://xemstudio.com/api/geometry?object=aisc-mc-channels