{
  "kind": "qsd-material-takeoff",
  "version": 1,
  "rows": [
    {
      "mark": "B12",
      "shape": "W18X35",
      "length": 21,
      "unit": "ft",
      "quantity": 4
    },
    {
      "mark": "B13",
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      "unit": "ft",
      "quantity": 2
    },
    {
      "mark": "M21",
      "shape": "C8X11.5",
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      "unit": "ft",
      "quantity": 2
    }
  ]
}