{
  "scope": "Four explicitly assumed mass/weight estimates; original transcription is retained separately.",
  "records": [
    {
      "sourceId": "1a-small-vanity",
      "sheet": "project-1a.jpg",
      "label": "Middle right small vanity",
      "group": 5,
      "quantity": 1,
      "areaM2": 0.36653152499999997,
      "thicknessMm": 20,
      "thicknessBasis": "20 mm assumption",
      "densityKgM3": 2400,
      "densityBasis": "Generic quartz calculation assumption; exact material unconfirmed",
      "volumeM3": 0.0073306305,
      "massKg": 17.5935132,
      "weightN": 172.592364492,
      "status": "Estimated; not a measured mass or verified material property"
    },
    {
      "sourceId": "1b-small-vanity",
      "sheet": "project-1b.jpg",
      "label": "Middle small vanity",
      "group": 5,
      "quantity": 1,
      "areaM2": 0.36653152499999997,
      "thicknessMm": 20,
      "thicknessBasis": "20 mm assumption",
      "densityKgM3": 2400,
      "densityBasis": "Generic quartz calculation assumption; exact material unconfirmed",
      "volumeM3": 0.0073306305,
      "massKg": 17.5935132,
      "weightN": 172.592364492,
      "status": "Estimated; not a measured mass or verified material property"
    },
    {
      "sourceId": "1a-lower-desk",
      "sheet": "project-1a.jpg",
      "label": "Lower desk",
      "group": 6,
      "quantity": 1,
      "areaM2": 0.76112751,
      "thicknessMm": 30,
      "thicknessBasis": "Drawing reading",
      "densityKgM3": 2400,
      "densityBasis": "Generic quartz calculation assumption; exact material unconfirmed",
      "volumeM3": 0.022833825300000003,
      "massKg": 54.801180720000005,
      "weightN": 537.5995828632001,
      "status": "Estimated; not a measured mass or verified material property"
    },
    {
      "sourceId": "1b-lower-desk",
      "sheet": "project-1b.jpg",
      "label": "Lower desk",
      "group": 6,
      "quantity": 1,
      "areaM2": 0.757982355,
      "thicknessMm": 30,
      "thicknessBasis": "Drawing reading",
      "densityKgM3": 2400,
      "densityBasis": "Generic quartz calculation assumption; exact material unconfirmed",
      "volumeM3": 0.022739470650000003,
      "massKg": 54.57472956000001,
      "weightN": 535.3780969836001,
      "status": "Estimated; not a measured mass or verified material property"
    }
  ]
}