{
 "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-c-channels",
 "name": "C channels (AISC American Standard channels): C6x13, C8x11.5, C12x20.7 dimensions + STEP/STL",
 "kind": "standard",
 "category": "Hardware",
 "group": "Framing",
 "year": null,
 "question": "What are the dimensions of a C6x13 channel?",
 "tags": [
  "steel",
  "c channel",
  "channel",
  "aisc",
  "structural steel",
  "tapered flange"
 ],
 "aliases": [
  "c6x13 dimensions",
  "c6x13",
  "c 6 x 13",
  "c8x11.5",
  "c4x5.4",
  "c3x4.1",
  "c10x15.3",
  "c12x20.7",
  "c15x33.9",
  "c channel dimensions",
  "steel channel dimensions",
  "c channel step file",
  "american standard channel"
 ],
 "overall_mm": {
  "length": 101.6,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 19,
 "url": "https://xemstudio.com/objects/aisc-c-channels/",
 "sheet_txt": "https://xemstudio.com/objects/aisc-c-channels/sheet.txt",
 "sheet": {
  "basis": "AISC Shapes Database (v15.0 values): d, bf, tw, tf, k for every C shape; 2:12 inner flange slope",
  "overall_mm": {
   "length": 101.6,
   "width": null,
   "height": null
  },
  "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."
  ],
  "table": {
   "columns": [
    "shape",
    "lb/ft",
    "d (in)",
    "bf (in)",
    "tw (in)",
    "tf mean (in)",
    "k (in)",
    "d (mm)",
    "bf (mm)",
    "tw (mm)",
    "tf (mm)"
   ],
   "rows": [
    [
     "C15x50",
     50,
     15,
     3.72,
     0.716,
     0.65,
     1.44,
     381,
     94.5,
     18.19,
     16.51
    ],
    [
     "C15x40",
     40,
     15,
     3.52,
     0.52,
     0.65,
     1.44,
     381,
     89.4,
     13.21,
     16.51
    ],
    [
     "C15x33.9",
     33.9,
     15,
     3.4,
     0.4,
     0.65,
     1.44,
     381,
     86.4,
     10.16,
     16.51
    ],
    [
     "C12x30",
     30,
     12,
     3.17,
     0.51,
     0.501,
     1.13,
     304.8,
     80.5,
     12.95,
     12.73
    ],
    [
     "C12x25",
     25,
     12,
     3.05,
     0.387,
     0.501,
     1.13,
     304.8,
     77.5,
     9.83,
     12.73
    ],
    [
     "C12x20.7",
     20.7,
     12,
     2.94,
     0.282,
     0.501,
     1.13,
     304.8,
     74.7,
     7.16,
     12.73
    ],
    [
     "C10x30",
     30,
     10,
     3.03,
     0.673,
     0.436,
     1,
     254,
     77,
     17.09,
     11.07
    ],
    [
     "C10x25",
     25,
     10,
     2.89,
     0.526,
     0.436,
     1,
     254,
     73.4,
     13.36,
     11.07
    ],
    [
     "C10x20",
     20,
     10,
     2.74,
     0.379,
     0.436,
     1,
     254,
     69.6,
     9.63,
     11.07
    ],
    [
     "C10x15.3",
     15.3,
     10,
     2.6,
     0.24,
     0.436,
     1,
     254,
     66,
     6.1,
     11.07
    ],
    [
     "C9x20",
     20,
     9,
     2.65,
     0.448,
     0.413,
     1,
     228.6,
     67.3,
     11.38,
     10.49
    ],
    [
     "C9x15",
     15,
     9,
     2.49,
     0.285,
     0.413,
     1,
     228.6,
     63.2,
     7.24,
     10.49
    ],
    [
     "C9x13.4",
     13.4,
     9,
     2.43,
     0.233,
     0.413,
     1,
     228.6,
     61.7,
     5.92,
     10.49
    ],
    [
     "C8x18.75",
     18.75,
     8,
     2.53,
     0.487,
     0.39,
     0.938,
     203.2,
     64.3,
     12.37,
     9.91
    ],
    [
     "C8x13.75",
     13.75,
     8,
     2.34,
     0.303,
     0.39,
     0.938,
     203.2,
     59.4,
     7.7,
     9.91
    ],
    [
     "C8x11.5",
     11.5,
     8,
     2.26,
     0.22,
     0.39,
     0.938,
     203.2,
     57.4,
     5.59,
     9.91
    ],
    [
     "C7x14.75",
     14.75,
     7,
     2.3,
     0.419,
     0.366,
     0.875,
     177.8,
     58.4,
     10.64,
     9.3
    ],
    [
     "C7x12.25",
     12.25,
     7,
     2.19,
     0.314,
     0.366,
     0.875,
     177.8,
     55.6,
     7.98,
     9.3
    ],
    [
     "C7x9.8",
     9.8,
     7,
     2.09,
     0.21,
     0.366,
     0.875,
     177.8,
     53.1,
     5.33,
     9.3
    ],
    [
     "C6x13",
     13,
     6,
     2.16,
     0.437,
     0.343,
     0.813,
     152.4,
     54.9,
     11.1,
     8.71
    ],
    [
     "C6x10.5",
     10.5,
     6,
     2.03,
     0.314,
     0.343,
     0.813,
     152.4,
     51.6,
     7.98,
     8.71
    ],
    [
     "C6x8.2",
     8.2,
     6,
     1.92,
     0.2,
     0.343,
     0.813,
     152.4,
     48.8,
     5.08,
     8.71
    ],
    [
     "C5x9",
     9,
     5,
     1.89,
     0.325,
     0.32,
     0.75,
     127,
     48,
     8.25,
     8.13
    ],
    [
     "C5x6.7",
     6.7,
     5,
     1.75,
     0.19,
     0.32,
     0.75,
     127,
     44.4,
     4.83,
     8.13
    ],
    [
     "C4x7.25",
     7.25,
     4,
     1.72,
     0.321,
     0.296,
     0.75,
     101.6,
     43.7,
     8.15,
     7.52
    ],
    [
     "C4x6.25",
     6.25,
     4,
     1.65,
     0.247,
     0.296,
     0.75,
     101.6,
     41.9,
     6.27,
     7.52
    ],
    [
     "C4x5.4",
     5.4,
     4,
     1.58,
     0.184,
     0.296,
     0.75,
     101.6,
     40.1,
     4.67,
     7.52
    ],
    [
     "C4x4.5",
     4.5,
     4,
     1.52,
     0.125,
     0.296,
     0.75,
     101.6,
     38.6,
     3.17,
     7.52
    ],
    [
     "C3x6",
     6,
     3,
     1.6,
     0.356,
     0.273,
     0.688,
     76.2,
     40.6,
     9.04,
     6.93
    ],
    [
     "C3x5",
     5,
     3,
     1.5,
     0.258,
     0.273,
     0.688,
     76.2,
     38.1,
     6.55,
     6.93
    ],
    [
     "C3x4.1",
     4.1,
     3,
     1.41,
     0.17,
     0.273,
     0.688,
     76.2,
     35.8,
     4.32,
     6.93
    ],
    [
     "C3x3.5",
     3.5,
     3,
     1.37,
     0.132,
     0.273,
     0.688,
     76.2,
     34.8,
     3.35,
     6.93
    ]
   ]
  }
 },
 "sheet_text": "C channels (AISC American Standard channels): C6x13, C8x11.5, C12x20.7 dimensions + STEP/STL — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/aisc-c-channels/  (sheet CC BY 4.0)\nBasis: AISC Shapes Database (v15.0 values): d, bf, tw, tf, k for every C shape; 2:12 inner flange slope\nCatalog version: 2026-10-20\n\nOverall (mm): length 101.6\n- 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.\n- 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).\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- 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.\n- MC (miscellaneous) channels, with other proportions, are on aisc-mc-channels.\n\nshape  lb/ft  d (in)  bf (in)  tw (in)  tf mean (in)  k (in)  d (mm)  bf (mm)  tw (mm)  tf (mm)\nC15x50  50.0  15.0  3.72  0.716  0.65  1.44  381.0  94.5  18.19  16.51\nC15x40  40.0  15.0  3.52  0.52  0.65  1.44  381.0  89.4  13.21  16.51\nC15x33.9  33.9  15.0  3.4  0.4  0.65  1.44  381.0  86.4  10.16  16.51\nC12x30  30.0  12.0  3.17  0.51  0.501  1.13  304.8  80.5  12.95  12.73\nC12x25  25.0  12.0  3.05  0.387  0.501  1.13  304.8  77.5  9.83  12.73\nC12x20.7  20.7  12.0  2.94  0.282  0.501  1.13  304.8  74.7  7.16  12.73\nC10x30  30.0  10.0  3.03  0.673  0.436  1.0  254.0  77.0  17.09  11.07\nC10x25  25.0  10.0  2.89  0.526  0.436  1.0  254.0  73.4  13.36  11.07\nC10x20  20.0  10.0  2.74  0.379  0.436  1.0  254.0  69.6  9.63  11.07\nC10x15.3  15.3  10.0  2.6  0.24  0.436  1.0  254.0  66.0  6.1  11.07\nC9x20  20.0  9.0  2.65  0.448  0.413  1.0  228.6  67.3  11.38  10.49\nC9x15  15.0  9.0  2.49  0.285  0.413  1.0  228.6  63.2  7.24  10.49\nC9x13.4  13.4  9.0  2.43  0.233  0.413  1.0  228.6  61.7  5.92  10.49\nC8x18.75  18.75  8.0  2.53  0.487  0.39  0.938  203.2  64.3  12.37  9.91\nC8x13.75  13.75  8.0  2.34  0.303  0.39  0.938  203.2  59.4  7.7  9.91\nC8x11.5  11.5  8.0  2.26  0.22  0.39  0.938  203.2  57.4  5.59  9.91\nC7x14.75  14.75  7.0  2.3  0.419  0.366  0.875  177.8  58.4  10.64  9.3\nC7x12.25  12.25  7.0  2.19  0.314  0.366  0.875  177.8  55.6  7.98  9.3\nC7x9.8  9.8  7.0  2.09  0.21  0.366  0.875  177.8  53.1  5.33  9.3\nC6x13  13.0  6.0  2.16  0.437  0.343  0.813  152.4  54.9  11.1  8.71\nC6x10.5  10.5  6.0  2.03  0.314  0.343  0.813  152.4  51.6  7.98  8.71\nC6x8.2  8.2  6.0  1.92  0.2  0.343  0.813  152.4  48.8  5.08  8.71\nC5x9  9.0  5.0  1.89  0.325  0.32  0.75  127.0  48.0  8.25  8.13\nC5x6.7  6.7  5.0  1.75  0.19  0.32  0.75  127.0  44.4  4.83  8.13\nC4x7.25  7.25  4.0  1.72  0.321  0.296  0.75  101.6  43.7  8.15  7.52\nC4x6.25  6.25  4.0  1.65  0.247  0.296  0.75  101.6  41.9  6.27  7.52\nC4x5.4  5.4  4.0  1.58  0.184  0.296  0.75  101.6  40.1  4.67  7.52\nC4x4.5  4.5  4.0  1.52  0.125  0.296  0.75  101.6  38.6  3.17  7.52\nC3x6  6.0  3.0  1.6  0.356  0.273  0.688  76.2  40.6  9.04  6.93\nC3x5  5.0  3.0  1.5  0.258  0.273  0.688  76.2  38.1  6.55  6.93\nC3x4.1  4.1  3.0  1.41  0.17  0.273  0.688  76.2  35.8  4.32  6.93\nC3x3.5  3.5  3.0  1.37  0.132  0.273  0.688  76.2  34.8  3.35  6.93\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- 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/\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 19 parts): https://xemstudio.com/files/hardware/aisc-c-channels/index.json\nAPI: https://xemstudio.com/api/geometry?object=aisc-c-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
  },
  {
   "publisher": "draftsperson.net",
   "title": "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",
   "url": "https://blog.draftsperson.net/steel-shapes-and-sizes/",
   "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-mc-channels",
  "aisc-w-shapes",
  "aisc-s-shapes",
  "strut-channel-1-5-8",
  "din-upn-channels"
 ],
 "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 the web thickness of a C6x13?",
   "a": "0.437 in (11.1 mm) per the AISC database; flange width 2.16 in."
  },
  {
   "q": "What does C6x13 mean?",
   "a": "A channel about 6 in deep weighing 13 lb per foot."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "c3x4-1-4in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "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",
   "note": "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"
  },
  {
   "file": "c3x6-4in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/aisc-c-channels/c3x6-4in.step",
   "stl": "https://xemstudio.com/files/hardware/aisc-c-channels/c3x6-4in.stl",
   "note": "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"
  },
  {
   "file": "c4x5-4-4in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "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",
   "note": "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"
  },
  {
   "file": "c4x7-25-4in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "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",
   "note": "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"
  },
  {
   "file": "c5x6-7-4in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "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",
   "note": "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"
  },
  {
   "file": "c5x9-4in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/aisc-c-channels/c5x9-4in.step",
   "stl": "https://xemstudio.com/files/hardware/aisc-c-channels/c5x9-4in.stl",
   "note": "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"
  },
  {
   "file": "c6x8-2-4in",
   "formats": [
    "step",
    "stl"
   ],
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   "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",
   "note": "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"
  },
  {
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   "stl": "https://xemstudio.com/files/hardware/aisc-c-channels/c6x13-4in.stl",
   "note": "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"
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  {
   "file": "c7x9-8-4in",
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/aisc-c-channels/c7x9-8-4in.stl",
   "note": "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"
  },
  {
   "file": "c7x14-75-4in",
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   "stl": "https://xemstudio.com/files/hardware/aisc-c-channels/c7x14-75-4in.stl",
   "note": "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"
  },
  {
   "file": "c8x11-5-4in",
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   "stl": "https://xemstudio.com/files/hardware/aisc-c-channels/c8x11-5-4in.stl",
   "note": "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"
  },
  {
   "file": "c8x18-75-4in",
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   "stl": "https://xemstudio.com/files/hardware/aisc-c-channels/c8x18-75-4in.stl",
   "note": "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"
  },
  {
   "file": "c9x15-4in",
   "formats": [
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   "stl": "https://xemstudio.com/files/hardware/aisc-c-channels/c9x15-4in.stl",
   "note": "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"
  },
  {
   "file": "c10x15-3-4in",
   "formats": [
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   "stl": "https://xemstudio.com/files/hardware/aisc-c-channels/c10x15-3-4in.stl",
   "note": "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"
  },
  {
   "file": "c10x30-4in",
   "formats": [
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   "stl": "https://xemstudio.com/files/hardware/aisc-c-channels/c10x30-4in.stl",
   "note": "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"
  },
  {
   "file": "c12x20-7-4in",
   "formats": [
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   "stl": "https://xemstudio.com/files/hardware/aisc-c-channels/c12x20-7-4in.stl",
   "note": "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"
  },
  {
   "file": "c12x30-4in",
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   "stl": "https://xemstudio.com/files/hardware/aisc-c-channels/c12x30-4in.stl",
   "note": "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"
  },
  {
   "file": "c15x33-9-4in",
   "formats": [
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/aisc-c-channels/c15x33-9-4in.stl",
   "note": "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"
  },
  {
   "file": "c15x50-4in",
   "formats": [
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/aisc-c-channels/c15x50-4in.stl",
   "note": "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"
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 ],
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