{
 "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": "expanded-metal-standard-designations-swd-lwd",
 "name": "Expanded metal standard designations: 1/2-#13, 3/4-#9, 1-1/2-#9 — SWD, LWD, strand width, strand thickness, standard (raised) vs flattened",
 "kind": "standard",
 "category": "Hardware",
 "group": "Materials & stock",
 "year": null,
 "question": "What are the dimensions of standard expanded metal such as 1/2 #13, 3/4 #9 or 1-1/2 #9: SWD, LWD, strand width and thickness, and how does flattened differ from standard?",
 "tags": [
  "expanded metal",
  "expanded steel",
  "expanded mesh",
  "diamond mesh",
  "flattened expanded metal",
  "raised expanded metal",
  "expanded metal lath",
  "swd lwd",
  "1/2 #13",
  "3/4 #9",
  "expanded metal sheet",
  "astm f1267"
 ],
 "aliases": [
  "expanded metal size chart",
  "expanded metal 3/4 #9 dimensions",
  "1/2 #13 expanded metal",
  "expanded metal SWD LWD meaning",
  "flattened vs standard expanded metal",
  "expanded metal strand width thickness",
  "expanded metal open area 3/4 #9",
  "expanded metal weight per sq ft",
  "1-1/2 #9 expanded metal dimensions",
  "expanded metal designation explained",
  "3/4 flattened expanded metal 9 gauge",
  "expanded metal diamond size chart"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "not-scanned",
 "les": false,
 "free_files": 0,
 "url": "https://xemstudio.com/objects/expanded-metal-standard-designations-swd-lwd/",
 "sheet_txt": "https://xemstudio.com/objects/expanded-metal-standard-designations-swd-lwd/sheet.txt",
 "sheet": {
  "basis": "Coyote Steel's raised-type table (16 styles), Russel Metals' selected styles for steel, aluminum and stainless, AMICO's flattened carbon steel table and two Continental Steel items; numbers only, shown side by side",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Designation: the first number is the nominal diamond size in inches (1/4, 1/2, 3/4, 1, 1-1/2), the second is the approximate gauge of the sheet before it is expanded (No. 20, 18, 16, 13, 10, 9, 6); Coyote Steel adds that No. 9 and No. 10 are exceptions to the pattern, and Continental Steel's footnote says the first number is the width measured centre to centre of bonds. A third number (3/4-No. 9-11) is the gauge after flattening. Aluminum and stainless styles use a thickness in inches instead (1/2-.081, 3/4-.125, 1/2-.050).",
   "SWD is the short way of the diamond (across the sheet width in the usual orientation), LWD the long way (along the sheet length); SWO and LWO are the openings; strand width is the face of each strand; strand thickness is the gauge of the metal expanded; overall thickness is the height of the finished mesh. The sources define SWD / LWD differently and the numbers are not interchangeable: Coyote Steel prints 'diamond size' (3/4 No. 9: 0.86 × 2.0), Russel Metals prints 'bridge centre to centre' (3/4-9: 0.923 × 2) and AMICO prints 0.923 × 2.10 for the same nominal size. Read the column 'what SWD / LWD are' for each row; compare only like with like.",
   "Standard (raised) mesh keeps the strands angled out of the plane, so overall thickness is about twice the strand thickness or more (Coyote 3/4 No. 9: 0.290 against strand thickness 0.134); flattened mesh is rolled flat, which lengthens the diamond, thins it and raises its open area (McNichols: flattened has a smooth surface; standard 'greater rigidity and traction'). Continental Steel's two items illustrate it: 3/4-No. 13 standard is 0.185 in thick, 3/4-No. 9-11 flattened is 0.110 in.",
   "Where sources overlap they agree: 3/4 No. 13 standard is 0.88 × 2.0 in diamond, 0.185 in thick and 0.80 lb per sq ft at Coyote and Continental; 3/4 No. 9 standard is 180 lb per 100 sq ft at Russel Metals and 1.80 lb per sq ft at Coyote. AMICO's table is headed flattened and prints 157 lb per 100 sq ft for 3/4-#9 with strand width 0.165, thickness 0.108 and 64% open; it does not agree with the Continental flattened 3/4-9-11 item (171 lb; SWD 0.857), so treat AMICO's rows as one maker's listing. Russel Metals marks its values approximate and states weight and dimension tolerances elsewhere (not copied).",
   "Aluminum 'grating' expanded mesh (2.0 lb to 7.0 lb styles) and expanded steel grating (3 lb to 6.25 lb) exist in the Russel Metals and other tables but are left out here. Open area is as printed; it is not recomputed because the strands' exact geometry is not published. No file: the strand twist and bond shape of an expanded sheet are not published as numbers, so a drawn mesh would be invented. Perforated alternative: perforated-metal-round-hole-standard-patterns; woven alternative: woven-wire-mesh-sizes-opening-open-area; walkway grating: bar-grating-designations-19-w-4-naamm.",
   "McNichols publishes a spec sheet and CAD drawing PDF per expanded metal item; its category page is linked, nothing is copied."
  ],
  "table": {
   "columns": [
    "source",
    "type",
    "designation",
    "SWD (in)",
    "LWD (in)",
    "what SWD / LWD are (source's wording)",
    "SWO (in)",
    "LWO (in)",
    "strand width (in)",
    "strand thickness (in)",
    "overall thickness (in)",
    "open area %",
    "weight / gauge as printed",
    "SWD × LWD (mm, computed)"
   ],
   "rows": [
    [
     "Coyote Steel",
     "raised (standard)",
     "1/4 No. 20",
     "0.26",
     "1.0",
     "diamond size SWD × LWD",
     "0.13",
     "0.69",
     "0.076",
     "0.036",
     "0.125",
     "40",
     "0.86 lb per sq ft; gauge 20",
     "6.6 × 25.4"
    ],
    [
     "Coyote Steel",
     "raised (standard)",
     "1/4 No. 18",
     "0.26",
     "1.0",
     "diamond size SWD × LWD",
     "0.13",
     "0.69",
     "0.076",
     "0.047",
     "0.125",
     "40",
     "1.14 lb per sq ft; gauge 18",
     "6.6 × 25.4"
    ],
    [
     "Coyote Steel",
     "raised (standard)",
     "1/2 No. 20",
     "0.46",
     "1.2",
     "diamond size SWD × LWD",
     "0.38",
     "0.88",
     "0.066",
     "0.036",
     "0.134",
     "71",
     "0.43 lb per sq ft; gauge 20",
     "11.7 × 30.5"
    ],
    [
     "Coyote Steel",
     "raised (standard)",
     "1/2 No. 18",
     "0.51",
     "1.2",
     "diamond size SWD × LWD",
     "0.38",
     "0.95",
     "0.089",
     "0.047",
     "0.161",
     "65",
     "0.7 lb per sq ft; gauge 18",
     "13.0 × 30.5"
    ],
    [
     "Coyote Steel",
     "raised (standard)",
     "1/2 No. 16",
     "0.51",
     "1.2",
     "diamond size SWD × LWD",
     "0.38",
     "0.89",
     "0.089",
     "0.059",
     "0.159",
     "65",
     "0.86 lb per sq ft; gauge 16",
     "13.0 × 30.5"
    ],
    [
     "Coyote Steel",
     "raised (standard)",
     "1/2 No. 13",
     "0.5",
     "1.2",
     "diamond size SWD × LWD",
     "0.35",
     "0.9",
     "0.098",
     "0.089",
     "0.199",
     "61",
     "1.47 lb per sq ft; gauge 13",
     "12.7 × 30.5"
    ],
    [
     "Coyote Steel",
     "raised (standard)",
     "3/4 No. 16",
     "0.88",
     "2.0",
     "diamond size SWD × LWD",
     "0.7",
     "1.64",
     "0.095",
     "0.059",
     "0.183",
     "76",
     "0.54 lb per sq ft; gauge 16",
     "22.4 × 50.8"
    ],
    [
     "Coyote Steel",
     "raised (standard)",
     "3/4 No. 13",
     "0.88",
     "2.0",
     "diamond size SWD × LWD",
     "0.76",
     "1.64",
     "0.095",
     "0.089",
     "0.185",
     "76",
     "0.8 lb per sq ft; gauge 13",
     "22.4 × 50.8"
    ],
    [
     "Coyote Steel",
     "raised (standard)",
     "3/4 No. 10",
     "0.89",
     "2.0",
     "diamond size SWD × LWD",
     "0.68",
     "1.56",
     "0.141",
     "0.089",
     "0.277",
     "69",
     "1.2 lb per sq ft; gauge 10",
     "22.6 × 50.8"
    ],
    [
     "Coyote Steel",
     "raised (standard)",
     "3/4 No. 9",
     "0.86",
     "2.0",
     "diamond size SWD × LWD",
     "0.6",
     "1.45",
     "0.137",
     "0.134",
     "0.29",
     "68",
     "1.8 lb per sq ft; gauge 9",
     "21.8 × 50.8"
    ],
    [
     "Coyote Steel",
     "raised (standard)",
     "1 No. 16",
     "1.01",
     "2.38",
     "diamond size SWD × LWD",
     "0.88",
     "1.94",
     "0.095",
     "0.059",
     "0.21",
     "82",
     "0.47 lb per sq ft; gauge 16",
     "25.7 × 60.5"
    ],
    [
     "Coyote Steel",
     "raised (standard)",
     "1-1/2 No. 16",
     "1.35",
     "3.0",
     "diamond size SWD × LWD",
     "1.18",
     "2.6",
     "0.112",
     "0.059",
     "0.21",
     "85",
     "0.4 lb per sq ft; gauge 16",
     "34.3 × 76.2"
    ],
    [
     "Coyote Steel",
     "raised (standard)",
     "1-1/2 No. 13",
     "1.35",
     "3.0",
     "diamond size SWD × LWD",
     "1.2",
     "2.6",
     "0.112",
     "0.089",
     "0.213",
     "85",
     "0.6 lb per sq ft; gauge 13",
     "34.3 × 76.2"
    ],
    [
     "Coyote Steel",
     "raised (standard)",
     "1-1/2 No. 10",
     "1.35",
     "3.0",
     "diamond size SWD × LWD",
     "1.16",
     "2.52",
     "0.14",
     "0.089",
     "0.248",
     "81",
     "0.79 lb per sq ft; gauge 10",
     "34.3 × 76.2"
    ],
    [
     "Coyote Steel",
     "raised (standard)",
     "1-1/2 No. 9",
     "1.33",
     "3.0",
     "diamond size SWD × LWD",
     "1.14",
     "2.43",
     "0.141",
     "0.134",
     "0.289",
     "76",
     "1.19 lb per sq ft; gauge 9",
     "33.8 × 76.2"
    ],
    [
     "Coyote Steel",
     "raised (standard)",
     "1-1/2 No. 6",
     "1.33",
     "3.0",
     "diamond size SWD × LWD",
     "1.0",
     "2.31",
     "0.203",
     "0.198",
     "0.41",
     "70",
     "2.5 lb per sq ft; gauge 6",
     "33.8 × 76.2"
    ],
    [
     "Russel Metals (approximate values)",
     "standard steel",
     "3/16-22",
     "0.203",
     "0.5",
     "bridge centre to centre",
     "0.11",
     "0.313",
     "0.047",
     "0.03",
     "—",
     "—",
     "56 lb per 100 sq ft",
     "5.2 × 12.7"
    ],
    [
     "Russel Metals (approximate values)",
     "standard steel",
     "1/4-18",
     "0.25",
     "1",
     "bridge centre to centre",
     "0.11",
     "0.718",
     "0.072",
     "0.048",
     "—",
     "—",
     "114 lb per 100 sq ft",
     "6.3 × 25.4"
    ],
    [
     "Russel Metals (approximate values)",
     "standard steel",
     "1/2-13",
     "0.5",
     "1.2",
     "bridge centre to centre",
     "0.312",
     "0.938",
     "0.096",
     "0.09",
     "—",
     "—",
     "147 lb per 100 sq ft",
     "12.7 × 30.5"
    ],
    [
     "Russel Metals (approximate values)",
     "standard steel",
     "3/4-9 (10 ga.)",
     "0.923",
     "2",
     "bridge centre to centre",
     "0.688",
     "1.56",
     "0.15",
     "0.135",
     "—",
     "—",
     "180 lb per 100 sq ft",
     "23.4 × 50.8"
    ],
    [
     "Russel Metals (approximate values)",
     "standard steel",
     "1-10H",
     "1",
     "2.3",
     "bridge centre to centre",
     "0.75",
     "1.56",
     "0.18",
     "0.135",
     "—",
     "—",
     "200 lb per 100 sq ft",
     "25.4 × 58.4"
    ],
    [
     "Russel Metals (approximate values)",
     "standard steel",
     "1-1/2-9 (10 ga.)",
     "1.33",
     "3",
     "bridge centre to centre",
     "1.16",
     "2.45",
     "0.142",
     "0.135",
     "—",
     "—",
     "120 lb per 100 sq ft",
     "33.8 × 76.2"
    ],
    [
     "Russel Metals (approximate values)",
     "flattened steel",
     "3/16-22F",
     "0.218",
     "0.5",
     "bridge centre to centre",
     "0.094",
     "0.343",
     "0.063",
     "0.027",
     "—",
     "—",
     "72 lb per 100 sq ft",
     "5.5 × 12.7"
    ],
    [
     "Russel Metals (approximate values)",
     "flattened steel",
     "1/2-16F",
     "0.5",
     "1.25",
     "bridge centre to centre",
     "0.312",
     "1",
     "0.096",
     "0.056",
     "—",
     "—",
     "82 lb per 100 sq ft",
     "12.7 × 31.8"
    ],
    [
     "Russel Metals (approximate values)",
     "flattened steel",
     "1-1/2-9F (10 ga.)",
     "1.33",
     "3.2",
     "bridge centre to centre",
     "1",
     "2.56",
     "0.158",
     "0.11",
     "—",
     "—",
     "114 lb per 100 sq ft",
     "33.8 × 81.3"
    ],
    [
     "Russel Metals (approximate values)",
     "standard aluminum",
     "3/16-.032",
     "0.203",
     "0.5",
     "bridge centre to centre",
     "0.08",
     "0.313",
     "0.06",
     "0.032",
     "—",
     "—",
     "28 lb per 100 sq ft",
     "5.2 × 12.7"
    ],
    [
     "Russel Metals (approximate values)",
     "standard aluminum",
     "1/2-.081",
     "0.5",
     "1.2",
     "bridge centre to centre",
     "0.375",
     "0.937",
     "0.08",
     "0.081",
     "—",
     "—",
     "41 lb per 100 sq ft",
     "12.7 × 30.5"
    ],
    [
     "Russel Metals (approximate values)",
     "standard aluminum",
     "3/4-.125",
     "0.923",
     "2",
     "bridge centre to centre",
     "0.687",
     "1.68",
     "0.169",
     "0.125",
     "—",
     "—",
     "65 lb per 100 sq ft",
     "23.4 × 50.8"
    ],
    [
     "Russel Metals (approximate values)",
     "standard stainless",
     "5/16-20ST",
     "0.333",
     "1.0",
     "bridge centre to centre",
     "0.219",
     "0.75",
     "0.078",
     "0.037",
     "—",
     "—",
     "86 lb per 100 sq ft",
     "8.5 × 25.4"
    ],
    [
     "Russel Metals (approximate values)",
     "standard stainless",
     "1/2-16ST",
     "0.5",
     "1.2",
     "bridge centre to centre",
     "0.437",
     "0.94",
     "0.08",
     "0.062",
     "—",
     "—",
     "84 lb per 100 sq ft",
     "12.7 × 30.5"
    ],
    [
     "Russel Metals (approximate values)",
     "standard stainless",
     "1-1/2-9ST",
     "1.33",
     "3.0",
     "bridge centre to centre",
     "1.13",
     "2.5",
     "0.155",
     "0.14",
     "—",
     "—",
     "137 lb per 100 sq ft",
     "33.8 × 76.2"
    ],
    [
     "AMICO (page headed flattened, carbon steel A1011)",
     "flattened",
     "1/4\" - #20",
     "0.25",
     "1.05",
     "as printed",
     "—",
     "—",
     "0.079",
     "—",
     "0.029 (called 'Thickness')",
     "37",
     "74 lb per 100 sq ft",
     "6.3 × 26.7"
    ],
    [
     "AMICO (page headed flattened, carbon steel A1011)",
     "flattened",
     "1/4\" - #18",
     "0.25",
     "1.05",
     "as printed",
     "—",
     "—",
     "0.08",
     "—",
     "0.038 (called 'Thickness')",
     "36",
     "100 lb per 100 sq ft",
     "6.3 × 26.7"
    ],
    [
     "AMICO (page headed flattened, carbon steel A1011)",
     "flattened",
     "1/2\" - #20",
     "0.5",
     "1.26",
     "as printed",
     "—",
     "—",
     "0.079",
     "—",
     "0.029 (called 'Thickness')",
     "68",
     "37 lb per 100 sq ft",
     "12.7 × 32.0"
    ],
    [
     "AMICO (page headed flattened, carbon steel A1011)",
     "flattened",
     "1/2\" - #18",
     "0.5",
     "1.26",
     "as printed",
     "—",
     "—",
     "0.097",
     "—",
     "0.038 (called 'Thickness')",
     "61",
     "61 lb per 100 sq ft",
     "12.7 × 32.0"
    ],
    [
     "AMICO (page headed flattened, carbon steel A1011)",
     "flattened",
     "1/2\" - #16",
     "0.5",
     "1.26",
     "as printed",
     "—",
     "—",
     "0.098",
     "—",
     "0.048 (called 'Thickness')",
     "61",
     "77 lb per 100 sq ft",
     "12.7 × 32.0"
    ],
    [
     "AMICO (page headed flattened, carbon steel A1011)",
     "flattened",
     "1/2\" - #13",
     "0.5",
     "1.26",
     "as printed",
     "—",
     "—",
     "0.107",
     "—",
     "0.072 (called 'Thickness')",
     "57",
     "126 lb per 100 sq ft",
     "12.7 × 32.0"
    ],
    [
     "AMICO (page headed flattened, carbon steel A1011)",
     "flattened",
     "3/4\" - #16",
     "0.923",
     "2.1",
     "as printed",
     "—",
     "—",
     "0.111",
     "—",
     "0.048 (called 'Thickness')",
     "76",
     "47 lb per 100 sq ft",
     "23.4 × 53.3"
    ],
    [
     "AMICO (page headed flattened, carbon steel A1011)",
     "flattened",
     "3/4\" - #14",
     "0.923",
     "2.1",
     "as printed",
     "—",
     "—",
     "0.105",
     "—",
     "0.06 (called 'Thickness')",
     "77",
     "56 lb per 100 sq ft",
     "23.4 × 53.3"
    ],
    [
     "AMICO (page headed flattened, carbon steel A1011)",
     "flattened",
     "3/4\" - #13",
     "0.923",
     "2.1",
     "as printed",
     "—",
     "—",
     "0.106",
     "—",
     "0.072 (called 'Thickness')",
     "77",
     "67 lb per 100 sq ft",
     "23.4 × 53.3"
    ],
    [
     "AMICO (page headed flattened, carbon steel A1011)",
     "flattened",
     "3/4\" - #10",
     "0.923",
     "2.1",
     "as printed",
     "—",
     "—",
     "0.16",
     "—",
     "0.072 (called 'Thickness')",
     "65",
     "102 lb per 100 sq ft",
     "23.4 × 53.3"
    ],
    [
     "AMICO (page headed flattened, carbon steel A1011)",
     "flattened",
     "3/4\" - #9",
     "0.923",
     "2.1",
     "as printed",
     "—",
     "—",
     "0.165",
     "—",
     "0.108 (called 'Thickness')",
     "64",
     "157 lb per 100 sq ft",
     "23.4 × 53.3"
    ],
    [
     "AMICO (page headed flattened, carbon steel A1011)",
     "flattened",
     "1\" - #16",
     "1.0",
     "2.52",
     "as printed",
     "—",
     "—",
     "0.098",
     "—",
     "0.048 (called 'Thickness')",
     "80",
     "38 lb per 100 sq ft",
     "25.4 × 64.0"
    ],
    [
     "AMICO (page headed flattened, carbon steel A1011)",
     "flattened",
     "1-1/2\" - #16",
     "1.33",
     "3.15",
     "as printed",
     "—",
     "—",
     "0.119",
     "—",
     "0.048 (called 'Thickness')",
     "82",
     "35 lb per 100 sq ft",
     "33.8 × 80.0"
    ],
    [
     "AMICO (page headed flattened, carbon steel A1011)",
     "flattened",
     "1-1/2\" - #14",
     "1.33",
     "3.15",
     "as printed",
     "—",
     "—",
     "0.116",
     "—",
     "0.06 (called 'Thickness')",
     "83",
     "43 lb per 100 sq ft",
     "33.8 × 80.0"
    ],
    [
     "AMICO (page headed flattened, carbon steel A1011)",
     "flattened",
     "1-1/2\" - #13",
     "1.33",
     "3.15",
     "as printed",
     "—",
     "—",
     "0.116",
     "—",
     "0.072 (called 'Thickness')",
     "83",
     "51 lb per 100 sq ft",
     "33.8 × 80.0"
    ],
    [
     "AMICO (page headed flattened, carbon steel A1011)",
     "flattened",
     "1-1/2\" - #9",
     "1.33",
     "3.15",
     "as printed",
     "—",
     "—",
     "0.158",
     "—",
     "0.108 (called 'Thickness')",
     "76",
     "105 lb per 100 sq ft",
     "33.8 × 80.0"
    ],
    [
     "Continental Steel FEM-750-171",
     "flattened",
     "3/4\"-No. 9-11",
     ".857",
     "2.10",
     "SWD / LWD",
     "—",
     "—",
     "—",
     "—",
     ".110",
     "—",
     "171 lb per 100 sq ft; gauge 9 before expanding, 11 after flattening",
     "21.8 × 53.3 (page prints mm)"
    ],
    [
     "Continental Steel SEM-750-80",
     "standard",
     "3/4\"-No. 13",
     ".880",
     "2.0",
     "diamond size",
     "—",
     "—",
     "—",
     "—",
     ".185",
     "—",
     "80 lb per 100 sq ft",
     "22.4 × 50.8"
    ]
   ]
  }
 },
 "sheet_text": "Expanded metal standard designations: 1/2-#13, 3/4-#9, 1-1/2-#9 — SWD, LWD, strand width, strand thickness, standard (raised) vs flattened — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/expanded-metal-standard-designations-swd-lwd/  (sheet CC BY 4.0)\nBasis: Coyote Steel's raised-type table (16 styles), Russel Metals' selected styles for steel, aluminum and stainless, AMICO's flattened carbon steel table and two Continental Steel items; numbers only, shown side by side\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Designation: the first number is the nominal diamond size in inches (1/4, 1/2, 3/4, 1, 1-1/2), the second is the approximate gauge of the sheet before it is expanded (No. 20, 18, 16, 13, 10, 9, 6); Coyote Steel adds that No. 9 and No. 10 are exceptions to the pattern, and Continental Steel's footnote says the first number is the width measured centre to centre of bonds. A third number (3/4-No. 9-11) is the gauge after flattening. Aluminum and stainless styles use a thickness in inches instead (1/2-.081, 3/4-.125, 1/2-.050).\n- SWD is the short way of the diamond (across the sheet width in the usual orientation), LWD the long way (along the sheet length); SWO and LWO are the openings; strand width is the face of each strand; strand thickness is the gauge of the metal expanded; overall thickness is the height of the finished mesh. The sources define SWD / LWD differently and the numbers are not interchangeable: Coyote Steel prints 'diamond size' (3/4 No. 9: 0.86 × 2.0), Russel Metals prints 'bridge centre to centre' (3/4-9: 0.923 × 2) and AMICO prints 0.923 × 2.10 for the same nominal size. Read the column 'what SWD / LWD are' for each row; compare only like with like.\n- Standard (raised) mesh keeps the strands angled out of the plane, so overall thickness is about twice the strand thickness or more (Coyote 3/4 No. 9: 0.290 against strand thickness 0.134); flattened mesh is rolled flat, which lengthens the diamond, thins it and raises its open area (McNichols: flattened has a smooth surface; standard 'greater rigidity and traction'). Continental Steel's two items illustrate it: 3/4-No. 13 standard is 0.185 in thick, 3/4-No. 9-11 flattened is 0.110 in.\n- Where sources overlap they agree: 3/4 No. 13 standard is 0.88 × 2.0 in diamond, 0.185 in thick and 0.80 lb per sq ft at Coyote and Continental; 3/4 No. 9 standard is 180 lb per 100 sq ft at Russel Metals and 1.80 lb per sq ft at Coyote. AMICO's table is headed flattened and prints 157 lb per 100 sq ft for 3/4-#9 with strand width 0.165, thickness 0.108 and 64% open; it does not agree with the Continental flattened 3/4-9-11 item (171 lb; SWD 0.857), so treat AMICO's rows as one maker's listing. Russel Metals marks its values approximate and states weight and dimension tolerances elsewhere (not copied).\n- Aluminum 'grating' expanded mesh (2.0 lb to 7.0 lb styles) and expanded steel grating (3 lb to 6.25 lb) exist in the Russel Metals and other tables but are left out here. Open area is as printed; it is not recomputed because the strands' exact geometry is not published. No file: the strand twist and bond shape of an expanded sheet are not published as numbers, so a drawn mesh would be invented. Perforated alternative: perforated-metal-round-hole-standard-patterns; woven alternative: woven-wire-mesh-sizes-opening-open-area; walkway grating: bar-grating-designations-19-w-4-naamm.\n- McNichols publishes a spec sheet and CAD drawing PDF per expanded metal item; its category page is linked, nothing is copied.\n\nsource  type  designation  SWD (in)  LWD (in)  what SWD / LWD are (source's wording)  SWO (in)  LWO (in)  strand width (in)  strand thickness (in)  overall thickness (in)  open area %  weight / gauge as printed  SWD × LWD (mm, computed)\nCoyote Steel  raised (standard)  1/4 No. 20  0.26  1.0  diamond size SWD × LWD  0.13  0.69  0.076  0.036  0.125  40  0.86 lb per sq ft; gauge 20  6.6 × 25.4\nCoyote Steel  raised (standard)  1/4 No. 18  0.26  1.0  diamond size SWD × LWD  0.13  0.69  0.076  0.047  0.125  40  1.14 lb per sq ft; gauge 18  6.6 × 25.4\nCoyote Steel  raised (standard)  1/2 No. 20  0.46  1.2  diamond size SWD × LWD  0.38  0.88  0.066  0.036  0.134  71  0.43 lb per sq ft; gauge 20  11.7 × 30.5\nCoyote Steel  raised (standard)  1/2 No. 18  0.51  1.2  diamond size SWD × LWD  0.38  0.95  0.089  0.047  0.161  65  0.7 lb per sq ft; gauge 18  13.0 × 30.5\nCoyote Steel  raised (standard)  1/2 No. 16  0.51  1.2  diamond size SWD × LWD  0.38  0.89  0.089  0.059  0.159  65  0.86 lb per sq ft; gauge 16  13.0 × 30.5\nCoyote Steel  raised (standard)  1/2 No. 13  0.5  1.2  diamond size SWD × LWD  0.35  0.9  0.098  0.089  0.199  61  1.47 lb per sq ft; gauge 13  12.7 × 30.5\nCoyote Steel  raised (standard)  3/4 No. 16  0.88  2.0  diamond size SWD × LWD  0.7  1.64  0.095  0.059  0.183  76  0.54 lb per sq ft; gauge 16  22.4 × 50.8\nCoyote Steel  raised (standard)  3/4 No. 13  0.88  2.0  diamond size SWD × LWD  0.76  1.64  0.095  0.089  0.185  76  0.8 lb per sq ft; gauge 13  22.4 × 50.8\nCoyote Steel  raised (standard)  3/4 No. 10  0.89  2.0  diamond size SWD × LWD  0.68  1.56  0.141  0.089  0.277  69  1.2 lb per sq ft; gauge 10  22.6 × 50.8\nCoyote Steel  raised (standard)  3/4 No. 9  0.86  2.0  diamond size SWD × LWD  0.6  1.45  0.137  0.134  0.29  68  1.8 lb per sq ft; gauge 9  21.8 × 50.8\nCoyote Steel  raised (standard)  1 No. 16  1.01  2.38  diamond size SWD × LWD  0.88  1.94  0.095  0.059  0.21  82  0.47 lb per sq ft; gauge 16  25.7 × 60.5\nCoyote Steel  raised (standard)  1-1/2 No. 16  1.35  3.0  diamond size SWD × LWD  1.18  2.6  0.112  0.059  0.21  85  0.4 lb per sq ft; gauge 16  34.3 × 76.2\nCoyote Steel  raised (standard)  1-1/2 No. 13  1.35  3.0  diamond size SWD × LWD  1.2  2.6  0.112  0.089  0.213  85  0.6 lb per sq ft; gauge 13  34.3 × 76.2\nCoyote Steel  raised (standard)  1-1/2 No. 10  1.35  3.0  diamond size SWD × LWD  1.16  2.52  0.14  0.089  0.248  81  0.79 lb per sq ft; gauge 10  34.3 × 76.2\nCoyote Steel  raised (standard)  1-1/2 No. 9  1.33  3.0  diamond size SWD × LWD  1.14  2.43  0.141  0.134  0.289  76  1.19 lb per sq ft; gauge 9  33.8 × 76.2\nCoyote Steel  raised (standard)  1-1/2 No. 6  1.33  3.0  diamond size SWD × LWD  1.0  2.31  0.203  0.198  0.41  70  2.5 lb per sq ft; gauge 6  33.8 × 76.2\nRussel Metals (approximate values)  standard steel  3/16-22  0.203  0.5  bridge centre to centre  0.11  0.313  0.047  0.03  —  —  56 lb per 100 sq ft  5.2 × 12.7\nRussel Metals (approximate values)  standard steel  1/4-18  0.25  1  bridge centre to centre  0.11  0.718  0.072  0.048  —  —  114 lb per 100 sq ft  6.3 × 25.4\nRussel Metals (approximate values)  standard steel  1/2-13  0.5  1.2  bridge centre to centre  0.312  0.938  0.096  0.09  —  —  147 lb per 100 sq ft  12.7 × 30.5\nRussel Metals (approximate values)  standard steel  3/4-9 (10 ga.)  0.923  2  bridge centre to centre  0.688  1.56  0.15  0.135  —  —  180 lb per 100 sq ft  23.4 × 50.8\nRussel Metals (approximate values)  standard steel  1-10H  1  2.3  bridge centre to centre  0.75  1.56  0.18  0.135  —  —  200 lb per 100 sq ft  25.4 × 58.4\nRussel Metals (approximate values)  standard steel  1-1/2-9 (10 ga.)  1.33  3  bridge centre to centre  1.16  2.45  0.142  0.135  —  —  120 lb per 100 sq ft  33.8 × 76.2\nRussel Metals (approximate values)  flattened steel  3/16-22F  0.218  0.5  bridge centre to centre  0.094  0.343  0.063  0.027  —  —  72 lb per 100 sq ft  5.5 × 12.7\nRussel Metals (approximate values)  flattened steel  1/2-16F  0.5  1.25  bridge centre to centre  0.312  1  0.096  0.056  —  —  82 lb per 100 sq ft  12.7 × 31.8\nRussel Metals (approximate values)  flattened steel  1-1/2-9F (10 ga.)  1.33  3.2  bridge centre to centre  1  2.56  0.158  0.11  —  —  114 lb per 100 sq ft  33.8 × 81.3\nRussel Metals (approximate values)  standard aluminum  3/16-.032  0.203  0.5  bridge centre to centre  0.08  0.313  0.06  0.032  —  —  28 lb per 100 sq ft  5.2 × 12.7\nRussel Metals (approximate values)  standard aluminum  1/2-.081  0.5  1.2  bridge centre to centre  0.375  0.937  0.08  0.081  —  —  41 lb per 100 sq ft  12.7 × 30.5\nRussel Metals (approximate values)  standard aluminum  3/4-.125  0.923  2  bridge centre to centre  0.687  1.68  0.169  0.125  —  —  65 lb per 100 sq ft  23.4 × 50.8\nRussel Metals (approximate values)  standard stainless  5/16-20ST  0.333  1.0  bridge centre to centre  0.219  0.75  0.078  0.037  —  —  86 lb per 100 sq ft  8.5 × 25.4\nRussel Metals (approximate values)  standard stainless  1/2-16ST  0.5  1.2  bridge centre to centre  0.437  0.94  0.08  0.062  —  —  84 lb per 100 sq ft  12.7 × 30.5\nRussel Metals (approximate values)  standard stainless  1-1/2-9ST  1.33  3.0  bridge centre to centre  1.13  2.5  0.155  0.14  —  —  137 lb per 100 sq ft  33.8 × 76.2\nAMICO (page headed flattened, carbon steel A1011)  flattened  1/4\" - #20  0.25  1.05  as printed  —  —  0.079  —  0.029 (called 'Thickness')  37  74 lb per 100 sq ft  6.3 × 26.7\nAMICO (page headed flattened, carbon steel A1011)  flattened  1/4\" - #18  0.25  1.05  as printed  —  —  0.08  —  0.038 (called 'Thickness')  36  100 lb per 100 sq ft  6.3 × 26.7\nAMICO (page headed flattened, carbon steel A1011)  flattened  1/2\" - #20  0.5  1.26  as printed  —  —  0.079  —  0.029 (called 'Thickness')  68  37 lb per 100 sq ft  12.7 × 32.0\nAMICO (page headed flattened, carbon steel A1011)  flattened  1/2\" - #18  0.5  1.26  as printed  —  —  0.097  —  0.038 (called 'Thickness')  61  61 lb per 100 sq ft  12.7 × 32.0\nAMICO (page headed flattened, carbon steel A1011)  flattened  1/2\" - #16  0.5  1.26  as printed  —  —  0.098  —  0.048 (called 'Thickness')  61  77 lb per 100 sq ft  12.7 × 32.0\nAMICO (page headed flattened, carbon steel A1011)  flattened  1/2\" - #13  0.5  1.26  as printed  —  —  0.107  —  0.072 (called 'Thickness')  57  126 lb per 100 sq ft  12.7 × 32.0\nAMICO (page headed flattened, carbon steel A1011)  flattened  3/4\" - #16  0.923  2.1  as printed  —  —  0.111  —  0.048 (called 'Thickness')  76  47 lb per 100 sq ft  23.4 × 53.3\nAMICO (page headed flattened, carbon steel A1011)  flattened  3/4\" - #14  0.923  2.1  as printed  —  —  0.105  —  0.06 (called 'Thickness')  77  56 lb per 100 sq ft  23.4 × 53.3\nAMICO (page headed flattened, carbon steel A1011)  flattened  3/4\" - #13  0.923  2.1  as printed  —  —  0.106  —  0.072 (called 'Thickness')  77  67 lb per 100 sq ft  23.4 × 53.3\nAMICO (page headed flattened, carbon steel A1011)  flattened  3/4\" - #10  0.923  2.1  as printed  —  —  0.16  —  0.072 (called 'Thickness')  65  102 lb per 100 sq ft  23.4 × 53.3\nAMICO (page headed flattened, carbon steel A1011)  flattened  3/4\" - #9  0.923  2.1  as printed  —  —  0.165  —  0.108 (called 'Thickness')  64  157 lb per 100 sq ft  23.4 × 53.3\nAMICO (page headed flattened, carbon steel A1011)  flattened  1\" - #16  1.0  2.52  as printed  —  —  0.098  —  0.048 (called 'Thickness')  80  38 lb per 100 sq ft  25.4 × 64.0\nAMICO (page headed flattened, carbon steel A1011)  flattened  1-1/2\" - #16  1.33  3.15  as printed  —  —  0.119  —  0.048 (called 'Thickness')  82  35 lb per 100 sq ft  33.8 × 80.0\nAMICO (page headed flattened, carbon steel A1011)  flattened  1-1/2\" - #14  1.33  3.15  as printed  —  —  0.116  —  0.06 (called 'Thickness')  83  43 lb per 100 sq ft  33.8 × 80.0\nAMICO (page headed flattened, carbon steel A1011)  flattened  1-1/2\" - #13  1.33  3.15  as printed  —  —  0.116  —  0.072 (called 'Thickness')  83  51 lb per 100 sq ft  33.8 × 80.0\nAMICO (page headed flattened, carbon steel A1011)  flattened  1-1/2\" - #9  1.33  3.15  as printed  —  —  0.158  —  0.108 (called 'Thickness')  76  105 lb per 100 sq ft  33.8 × 80.0\nContinental Steel FEM-750-171  flattened  3/4\"-No. 9-11  .857  2.10  SWD / LWD  —  —  —  —  .110  —  171 lb per 100 sq ft; gauge 9 before expanding, 11 after flattening  21.8 × 53.3 (page prints mm)\nContinental Steel SEM-750-80  standard  3/4\"-No. 13  .880  2.0  diamond size  —  —  —  —  .185  —  80 lb per 100 sq ft  22.4 × 50.8\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Coyote Steel: Expanded Metal, Raised Type: style designation, % open area, gauge, weight per sq ft, diamond size SWD × LWD, opening SWO × LWO, strand width × thickness, overall thickness — web — Distributor page; numbers only — https://coyotesteel.com/products_expanded_raised.shtml\n- Russel Metals: Expanded mesh terminology and types: standard steel, flattened steel, aluminum and stainless styles with weight, SWD / LWD bridge centre to centre, openings, strand thickness and width (approximate values) — web — Distributor page; numbers only — https://www.russelmetals.com/en/product/grating-mesh-and-perforated/expanded-metal/\n- AMICO: Flattened expanded metal, carbon steel (ASTM A1011): designation, SWD, LWD, strand width, thickness, open area %, weight lb per 100 sq ft — web — Maker page; numbers only — https://amicoglobal.com/flattened-expanded-metal/\n- Continental Steel: Flattened expanded metal 3/4\"-No. 9-11 (FEM-750-171): SWD, LWD, thickness, weight, gauge before and after flattening — web — Distributor page; numbers only — https://continentalsteel.com/item/expanded-metal-and-gratings/flattened-expanded-metal/fem-750-171\n- Continental Steel: Standard expanded metal 3/4\"-No. 13 (SEM-750-80): diamond size 0.880 × 2.0 in, thickness 0.185 in, weight 80 lb per 100 sq ft — web — Distributor page; numbers only — https://titanium-stainless-steel.continentalsteel.com/printitem/expanded-metal-and-gratings/standard-expanded-metal/sem-750-80?plpver=10\n- McNichols: Expanded metal: standard, flattened, grating and designer items with per-item spec sheet and CAD drawing PDFs — PDF, DWG — Maker site terms (drawings per item; DWG may need a login) [verify license at link] — https://www.mcnichols.com/expanded-metal/standard\n\nNo true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.\nAPI: https://xemstudio.com/api/geometry?object=expanded-metal-standard-designations-swd-lwd\n",
 "sources": [
  {
   "publisher": "Coyote Steel",
   "title": "Expanded Metal, Raised Type: style designation, % open area, gauge, weight per sq ft, diamond size SWD × LWD, opening SWO × LWO, strand width × thickness, overall thickness",
   "url": "https://coyotesteel.com/products_expanded_raised.shtml",
   "formats": [
    "web"
   ],
   "license": "Distributor page; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Russel Metals",
   "title": "Expanded mesh terminology and types: standard steel, flattened steel, aluminum and stainless styles with weight, SWD / LWD bridge centre to centre, openings, strand thickness and width (approximate values)",
   "url": "https://www.russelmetals.com/en/product/grating-mesh-and-perforated/expanded-metal/",
   "formats": [
    "web"
   ],
   "license": "Distributor page; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "AMICO",
   "title": "Flattened expanded metal, carbon steel (ASTM A1011): designation, SWD, LWD, strand width, thickness, open area %, weight lb per 100 sq ft",
   "url": "https://amicoglobal.com/flattened-expanded-metal/",
   "formats": [
    "web"
   ],
   "license": "Maker page; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Continental Steel",
   "title": "Flattened expanded metal 3/4\"-No. 9-11 (FEM-750-171): SWD, LWD, thickness, weight, gauge before and after flattening",
   "url": "https://continentalsteel.com/item/expanded-metal-and-gratings/flattened-expanded-metal/fem-750-171",
   "formats": [
    "web"
   ],
   "license": "Distributor page; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Continental Steel",
   "title": "Standard expanded metal 3/4\"-No. 13 (SEM-750-80): diamond size 0.880 × 2.0 in, thickness 0.185 in, weight 80 lb per 100 sq ft",
   "url": "https://titanium-stainless-steel.continentalsteel.com/printitem/expanded-metal-and-gratings/standard-expanded-metal/sem-750-80?plpver=10",
   "formats": [
    "web"
   ],
   "license": "Distributor page; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "McNichols",
   "title": "Expanded metal: standard, flattened, grating and designer items with per-item spec sheet and CAD drawing PDFs",
   "url": "https://www.mcnichols.com/expanded-metal/standard",
   "formats": [
    "PDF",
    "DWG"
   ],
   "license": "Maker site terms (drawings per item; DWG may need a login)",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "not-scanned",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "perforated-metal-round-hole-standard-patterns",
  "woven-wire-mesh-sizes-opening-open-area",
  "bar-grating-designations-19-w-4-naamm",
  "sheet-metal-gauge-chart-steel-galvanized-stainless-aluminum",
  "aluminum-angles",
  "steel-square-rectangular-tube-gauge-sizes"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no tolerance added)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no tolerance added. 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. Typical accuracy by process and ISO 286 fits: https://xemstudio.com/tolerances/",
 "mating": [],
 "faq": [
  {
   "q": "What does 3/4 #9 expanded metal mean?",
   "a": "A 3/4 in nominal diamond expanded from about 9 gauge sheet. Coyote Steel prints its diamond as 0.86 × 2.0 in with strands 0.137 wide and 0.134 thick, 0.290 in overall, 68% open, 1.80 lb per sq ft."
  },
  {
   "q": "What are SWD and LWD in expanded metal?",
   "a": "Short way and long way of the diamond: the two dimensions of one diamond, SWD across the sheet width and LWD along its length. Sources measure them differently (diamond size or bridge centre to centre), so check which one a table uses."
  },
  {
   "q": "What is the difference between flattened and standard expanded metal?",
   "a": "Flattened is rolled flat for a smooth surface and a longer, thinner diamond; standard (raised) keeps the angled strands for rigidity and traction. Example: 3/4-No. 13 standard is 0.185 in thick, 3/4-No. 9-11 flattened is 0.110 in (Continental Steel)."
  },
  {
   "q": "What does the second number in 1/2-#13 mean?",
   "a": "The approximate gauge of the sheet before it was expanded (Continental Steel and Coyote Steel)."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/expanded-metal-standard-designations-swd-lwd/index.md"
}