{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "aisc-mc-channels",
 "name": "MC channels (AISC miscellaneous channels): MC6x12, MC8x8.5, MC12x31 dimensions + STEP/STL",
 "kind": "standard",
 "category": "Hardware",
 "group": "Framing",
 "year": null,
 "question": "What are the dimensions of an MC8x8.5 channel?",
 "tags": [
  "steel",
  "mc channel",
  "channel",
  "aisc",
  "structural steel"
 ],
 "aliases": [
  "mc8x8.5 dimensions",
  "mc8x8.5",
  "mc 8 x 8.5",
  "mc6x12",
  "mc12x31",
  "mc10x22",
  "mc4x13.8",
  "mc3x7.1",
  "mc channel dimensions",
  "miscellaneous channel dimensions"
 ],
 "overall_mm": {
  "length": 101.6,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 12,
 "url": "https://xemstudio.com/objects/aisc-mc-channels/",
 "sheet_txt": "https://xemstudio.com/objects/aisc-mc-channels/sheet.txt",
 "sheet": {
  "basis": "AISC Shapes Database (v15.0 values): d, bf, tw, tf, k for every MC shape",
  "overall_mm": {
   "length": 101.6,
   "width": null,
   "height": null
  },
  "notes": [
   "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."
  ],
  "table": {
   "columns": [
    "shape",
    "lb/ft",
    "d (in)",
    "bf (in)",
    "tw (in)",
    "tf (in)",
    "k (in)",
    "d (mm)",
    "bf (mm)",
    "tw (mm)",
    "tf (mm)"
   ],
   "rows": [
    [
     "MC18x58",
     58,
     18,
     4.2,
     0.7,
     0.625,
     1.44,
     457.2,
     106.7,
     17.78,
     15.88
    ],
    [
     "MC18x51.9",
     51.9,
     18,
     4.1,
     0.6,
     0.625,
     1.44,
     457.2,
     104.1,
     15.24,
     15.88
    ],
    [
     "MC18x45.8",
     45.8,
     18,
     4,
     0.5,
     0.625,
     1.44,
     457.2,
     101.6,
     12.7,
     15.88
    ],
    [
     "MC18x42.7",
     42.7,
     18,
     3.95,
     0.45,
     0.625,
     1.44,
     457.2,
     100.3,
     11.43,
     15.88
    ],
    [
     "MC13x50",
     50,
     13,
     4.41,
     0.787,
     0.61,
     1.44,
     330.2,
     112,
     19.99,
     15.49
    ],
    [
     "MC13x40",
     40,
     13,
     4.19,
     0.56,
     0.61,
     1.44,
     330.2,
     106.4,
     14.22,
     15.49
    ],
    [
     "MC13x35",
     35,
     13,
     4.07,
     0.447,
     0.61,
     1.44,
     330.2,
     103.4,
     11.35,
     15.49
    ],
    [
     "MC13x31.8",
     31.8,
     13,
     4,
     0.375,
     0.61,
     1.44,
     330.2,
     101.6,
     9.52,
     15.49
    ],
    [
     "MC12x50",
     50,
     12,
     4.14,
     0.835,
     0.7,
     1.31,
     304.8,
     105.2,
     21.21,
     17.78
    ],
    [
     "MC12x45",
     45,
     12,
     4.01,
     0.71,
     0.7,
     1.31,
     304.8,
     101.9,
     18.03,
     17.78
    ],
    [
     "MC12x40",
     40,
     12,
     3.89,
     0.59,
     0.7,
     1.31,
     304.8,
     98.8,
     14.99,
     17.78
    ],
    [
     "MC12x35",
     35,
     12,
     3.77,
     0.465,
     0.7,
     1.31,
     304.8,
     95.8,
     11.81,
     17.78
    ],
    [
     "MC12x31",
     31,
     12,
     3.67,
     0.37,
     0.7,
     1.31,
     304.8,
     93.2,
     9.4,
     17.78
    ],
    [
     "MC12x14.3",
     14.3,
     12,
     2.12,
     0.25,
     0.313,
     0.75,
     304.8,
     53.8,
     6.35,
     7.95
    ],
    [
     "MC12x10.6",
     10.6,
     12,
     1.5,
     0.19,
     0.309,
     0.75,
     304.8,
     38.1,
     4.83,
     7.85
    ],
    [
     "MC10x41.1",
     41.1,
     10,
     4.32,
     0.796,
     0.575,
     1.31,
     254,
     109.7,
     20.22,
     14.6
    ],
    [
     "MC10x33.6",
     33.6,
     10,
     4.1,
     0.575,
     0.575,
     1.31,
     254,
     104.1,
     14.6,
     14.6
    ],
    [
     "MC10x28.5",
     28.5,
     10,
     3.95,
     0.425,
     0.575,
     1.31,
     254,
     100.3,
     10.79,
     14.6
    ],
    [
     "MC10x25",
     25,
     10,
     3.41,
     0.38,
     0.575,
     1.31,
     254,
     86.6,
     9.65,
     14.6
    ],
    [
     "MC10x22",
     22,
     10,
     3.32,
     0.29,
     0.575,
     1.31,
     254,
     84.3,
     7.37,
     14.6
    ],
    [
     "MC10x8.4",
     8.4,
     10,
     1.5,
     0.17,
     0.28,
     0.75,
     254,
     38.1,
     4.32,
     7.11
    ],
    [
     "MC10x6.5",
     6.5,
     10,
     1.17,
     0.152,
     0.202,
     0.563,
     254,
     29.7,
     3.86,
     5.13
    ],
    [
     "MC9x25.4",
     25.4,
     9,
     3.5,
     0.45,
     0.55,
     1.25,
     228.6,
     88.9,
     11.43,
     13.97
    ],
    [
     "MC9x23.9",
     23.9,
     9,
     3.45,
     0.4,
     0.55,
     1.25,
     228.6,
     87.6,
     10.16,
     13.97
    ],
    [
     "MC8x22.8",
     22.8,
     8,
     3.5,
     0.427,
     0.525,
     1.19,
     203.2,
     88.9,
     10.85,
     13.33
    ],
    [
     "MC8x21.4",
     21.4,
     8,
     3.45,
     0.375,
     0.525,
     1.19,
     203.2,
     87.6,
     9.52,
     13.33
    ],
    [
     "MC8x20",
     20,
     8,
     3.03,
     0.4,
     0.5,
     1.13,
     203.2,
     77,
     10.16,
     12.7
    ],
    [
     "MC8x18.7",
     18.7,
     8,
     2.98,
     0.353,
     0.5,
     1.13,
     203.2,
     75.7,
     8.97,
     12.7
    ],
    [
     "MC8x8.5",
     8.5,
     8,
     1.87,
     0.179,
     0.311,
     0.813,
     203.2,
     47.5,
     4.55,
     7.9
    ],
    [
     "MC7x22.7",
     22.7,
     7,
     3.6,
     0.503,
     0.5,
     1.13,
     177.8,
     91.4,
     12.78,
     12.7
    ],
    [
     "MC7x19.1",
     19.1,
     7,
     3.45,
     0.352,
     0.5,
     1.13,
     177.8,
     87.6,
     8.94,
     12.7
    ],
    [
     "MC6x18",
     18,
     6,
     3.5,
     0.379,
     0.475,
     1.06,
     152.4,
     88.9,
     9.63,
     12.06
    ],
    [
     "MC6x15.3",
     15.3,
     6,
     3.5,
     0.34,
     0.385,
     0.875,
     152.4,
     88.9,
     8.64,
     9.78
    ],
    [
     "MC6x16.3",
     16.3,
     6,
     3,
     0.375,
     0.475,
     1.06,
     152.4,
     76.2,
     9.52,
     12.06
    ],
    [
     "MC6x15.1",
     15.1,
     6,
     2.94,
     0.316,
     0.475,
     1.06,
     152.4,
     74.7,
     8.03,
     12.06
    ],
    [
     "MC6x12",
     12,
     6,
     2.5,
     0.31,
     0.375,
     0.875,
     152.4,
     63.5,
     7.87,
     9.52
    ],
    [
     "MC6x7",
     7,
     6,
     1.88,
     0.179,
     0.291,
     0.75,
     152.4,
     47.8,
     4.55,
     7.39
    ],
    [
     "MC6x6.5",
     6.5,
     6,
     1.85,
     0.155,
     0.291,
     0.75,
     152.4,
     47,
     3.94,
     7.39
    ],
    [
     "MC4x13.8",
     13.8,
     4,
     2.5,
     0.5,
     0.5,
     1,
     101.6,
     63.5,
     12.7,
     12.7
    ],
    [
     "MC3x7.1",
     7.1,
     3,
     1.94,
     0.312,
     0.351,
     0.813,
     76.2,
     49.3,
     7.92,
     8.92
    ]
   ]
  }
 },
 "sheet_text": "MC channels (AISC miscellaneous channels): MC6x12, MC8x8.5, MC12x31 dimensions + STEP/STL — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/aisc-mc-channels/  (sheet CC BY 4.0)\nBasis: AISC Shapes Database (v15.0 values): d, bf, tw, tf, k for every MC shape\nCatalog version: 2026-10-20\n\nOverall (mm): length 101.6\n- 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.\n- 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.\n- 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.\n- 12 of the 40 MC sizes have files; all sizes are in the table.\n\nshape  lb/ft  d (in)  bf (in)  tw (in)  tf (in)  k (in)  d (mm)  bf (mm)  tw (mm)  tf (mm)\nMC18x58  58.0  18.0  4.2  0.7  0.625  1.44  457.2  106.7  17.78  15.88\nMC18x51.9  51.9  18.0  4.1  0.6  0.625  1.44  457.2  104.1  15.24  15.88\nMC18x45.8  45.8  18.0  4.0  0.5  0.625  1.44  457.2  101.6  12.7  15.88\nMC18x42.7  42.7  18.0  3.95  0.45  0.625  1.44  457.2  100.3  11.43  15.88\nMC13x50  50.0  13.0  4.41  0.787  0.61  1.44  330.2  112.0  19.99  15.49\nMC13x40  40.0  13.0  4.19  0.56  0.61  1.44  330.2  106.4  14.22  15.49\nMC13x35  35.0  13.0  4.07  0.447  0.61  1.44  330.2  103.4  11.35  15.49\nMC13x31.8  31.8  13.0  4.0  0.375  0.61  1.44  330.2  101.6  9.52  15.49\nMC12x50  50.0  12.0  4.14  0.835  0.7  1.31  304.8  105.2  21.21  17.78\nMC12x45  45.0  12.0  4.01  0.71  0.7  1.31  304.8  101.9  18.03  17.78\nMC12x40  40.0  12.0  3.89  0.59  0.7  1.31  304.8  98.8  14.99  17.78\nMC12x35  35.0  12.0  3.77  0.465  0.7  1.31  304.8  95.8  11.81  17.78\nMC12x31  31.0  12.0  3.67  0.37  0.7  1.31  304.8  93.2  9.4  17.78\nMC12x14.3  14.3  12.0  2.12  0.25  0.313  0.75  304.8  53.8  6.35  7.95\nMC12x10.6  10.6  12.0  1.5  0.19  0.309  0.75  304.8  38.1  4.83  7.85\nMC10x41.1  41.1  10.0  4.32  0.796  0.575  1.31  254.0  109.7  20.22  14.6\nMC10x33.6  33.6  10.0  4.1  0.575  0.575  1.31  254.0  104.1  14.6  14.6\nMC10x28.5  28.5  10.0  3.95  0.425  0.575  1.31  254.0  100.3  10.79  14.6\nMC10x25  25.0  10.0  3.41  0.38  0.575  1.31  254.0  86.6  9.65  14.6\nMC10x22  22.0  10.0  3.32  0.29  0.575  1.31  254.0  84.3  7.37  14.6\nMC10x8.4  8.4  10.0  1.5  0.17  0.28  0.75  254.0  38.1  4.32  7.11\nMC10x6.5  6.5  10.0  1.17  0.152  0.202  0.563  254.0  29.7  3.86  5.13\nMC9x25.4  25.4  9.0  3.5  0.45  0.55  1.25  228.6  88.9  11.43  13.97\nMC9x23.9  23.9  9.0  3.45  0.4  0.55  1.25  228.6  87.6  10.16  13.97\nMC8x22.8  22.8  8.0  3.5  0.427  0.525  1.19  203.2  88.9  10.85  13.33\nMC8x21.4  21.4  8.0  3.45  0.375  0.525  1.19  203.2  87.6  9.52  13.33\nMC8x20  20.0  8.0  3.03  0.4  0.5  1.13  203.2  77.0  10.16  12.7\nMC8x18.7  18.7  8.0  2.98  0.353  0.5  1.13  203.2  75.7  8.97  12.7\nMC8x8.5  8.5  8.0  1.87  0.179  0.311  0.813  203.2  47.5  4.55  7.9\nMC7x22.7  22.7  7.0  3.6  0.503  0.5  1.13  177.8  91.4  12.78  12.7\nMC7x19.1  19.1  7.0  3.45  0.352  0.5  1.13  177.8  87.6  8.94  12.7\nMC6x18  18.0  6.0  3.5  0.379  0.475  1.06  152.4  88.9  9.63  12.06\nMC6x15.3  15.3  6.0  3.5  0.34  0.385  0.875  152.4  88.9  8.64  9.78\nMC6x16.3  16.3  6.0  3.0  0.375  0.475  1.06  152.4  76.2  9.52  12.06\nMC6x15.1  15.1  6.0  2.94  0.316  0.475  1.06  152.4  74.7  8.03  12.06\nMC6x12  12.0  6.0  2.5  0.31  0.375  0.875  152.4  63.5  7.87  9.52\nMC6x7  7.0  6.0  1.88  0.179  0.291  0.75  152.4  47.8  4.55  7.39\nMC6x6.5  6.5  6.0  1.85  0.155  0.291  0.75  152.4  47.0  3.94  7.39\nMC4x13.8  13.8  4.0  2.5  0.5  0.5  1.0  101.6  63.5  12.7  12.7\nMC3x7.1  7.1  3.0  1.94  0.312  0.351  0.813  76.2  49.3  7.92  8.92\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- 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\n- 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/\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 12 parts): https://xemstudio.com/files/hardware/aisc-mc-channels/index.json\nAPI: https://xemstudio.com/api/geometry?object=aisc-mc-channels\n",
 "sources": [
  {
   "publisher": "AISC (values via the ambaker1/aisc-csv extract, MIT)",
   "title": "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",
   "url": "https://github.com/ambaker1/aisc-csv",
   "formats": [
    "web"
   ],
   "license": "AISC publishes the database free of charge; dimensions are facts. aisc.org itself was not reachable from the build box",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "AISC",
   "title": "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",
   "url": "https://www.aisc.org/publications/steel-construction-manual-resources/",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "aisc-c-channels",
  "aisc-w-shapes",
  "aisc-l-angles"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn.",
 "mating": [],
 "faq": [
  {
   "q": "What is an MC channel?",
   "a": "A miscellaneous channel in the AISC manual: channel shapes that are not on the American Standard C list."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "mc3x7-1-4in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc3x7-1-4in.step",
   "stl": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc3x7-1-4in.stl",
   "note": "MC3 x 7.1 channel: depth 3.0 in (76.2 mm), flange 1.94 in (49.3 mm), web 0.312 in, flange 0.351 in, 4 in long"
  },
  {
   "file": "mc4x13-8-4in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc4x13-8-4in.step",
   "stl": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc4x13-8-4in.stl",
   "note": "MC4 x 13.8 channel: depth 4.0 in (101.6 mm), flange 2.5 in (63.5 mm), web 0.5 in, flange 0.5 in, 4 in long"
  },
  {
   "file": "mc6x12-4in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc6x12-4in.step",
   "stl": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc6x12-4in.stl",
   "note": "MC6 x 12 channel: depth 6.0 in (152.4 mm), flange 2.5 in (63.5 mm), web 0.31 in, flange 0.375 in, 4 in long"
  },
  {
   "file": "mc6x18-4in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc6x18-4in.step",
   "stl": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc6x18-4in.stl",
   "note": "MC6 x 18 channel: depth 6.0 in (152.4 mm), flange 3.5 in (88.9 mm), web 0.379 in, flange 0.475 in, 4 in long"
  },
  {
   "file": "mc8x8-5-4in",
   "formats": [
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   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc8x8-5-4in.stl",
   "note": "MC8 x 8.5 channel: depth 8.0 in (203.2 mm), flange 1.87 in (47.5 mm), web 0.179 in, flange 0.311 in, 4 in long"
  },
  {
   "file": "mc8x22-8-4in",
   "formats": [
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    "stl"
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc8x22-8-4in.stl",
   "note": "MC8 x 22.8 channel: depth 8.0 in (203.2 mm), flange 3.5 in (88.9 mm), web 0.427 in, flange 0.525 in, 4 in long"
  },
  {
   "file": "mc10x22-4in",
   "formats": [
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    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc10x22-4in.step",
   "stl": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc10x22-4in.stl",
   "note": "MC10 x 22 channel: depth 10.0 in (254.0 mm), flange 3.32 in (84.3 mm), web 0.29 in, flange 0.575 in, 4 in long"
  },
  {
   "file": "mc10x8-4-4in",
   "formats": [
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    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc10x8-4-4in.step",
   "stl": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc10x8-4-4in.stl",
   "note": "MC10 x 8.4 channel: depth 10.0 in (254.0 mm), flange 1.5 in (38.1 mm), web 0.17 in, flange 0.28 in, 4 in long"
  },
  {
   "file": "mc12x10-6-4in",
   "formats": [
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    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc12x10-6-4in.step",
   "stl": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc12x10-6-4in.stl",
   "note": "MC12 x 10.6 channel: depth 12.0 in (304.8 mm), flange 1.5 in (38.1 mm), web 0.19 in, flange 0.309 in, 4 in long"
  },
  {
   "file": "mc12x31-4in",
   "formats": [
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    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc12x31-4in.step",
   "stl": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc12x31-4in.stl",
   "note": "MC12 x 31 channel: depth 12.0 in (304.8 mm), flange 3.67 in (93.2 mm), web 0.37 in, flange 0.7 in, 4 in long"
  },
  {
   "file": "mc13x35-4in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc13x35-4in.step",
   "stl": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc13x35-4in.stl",
   "note": "MC13 x 35 channel: depth 13.0 in (330.2 mm), flange 4.07 in (103.4 mm), web 0.447 in, flange 0.61 in, 4 in long"
  },
  {
   "file": "mc18x42-7-4in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc18x42-7-4in.step",
   "stl": "https://xemstudio.com/files/hardware/aisc-mc-channels/mc18x42-7-4in.stl",
   "note": "MC18 x 42.7 channel: depth 18.0 in (457.2 mm), flange 3.95 in (100.3 mm), web 0.45 in, flange 0.625 in, 4 in long"
  }
 ],
 "markdown": "https://xemstudio.com/objects/aisc-mc-channels/index.md"
}