{
  "title": "Mechanical assembly takeoff",
  "revision": "Quantity export 2026-11-02; source drawing revision 04, 2026-09-16",
  "status": "Unpriced review example; field dimensions and coordination remain open",
  "source": {
    "document_id": null,
    "document_id_note": "No document ID assigned in the supplied source manifest.",
    "title": "Client mechanical drawing set (identity withheld)",
    "edition": "Revision 04, September 16, 2026",
    "sha256": "376b0c255165e00039c785d8008a16410c03d73ceaf9f8932fbe8e34a5941f00",
    "pages": [
      {
        "sheet": "M000",
        "physical_page": 23,
        "title": "Mechanical specifications"
      },
      {
        "sheet": "M101",
        "physical_page": 24,
        "title": "Mechanical floor plan"
      },
      {
        "sheet": "M102",
        "physical_page": 25,
        "title": "Mechanical roof plan"
      },
      {
        "sheet": "M301",
        "physical_page": 26,
        "title": "Mechanical details"
      },
      {
        "sheet": "M401",
        "physical_page": 27,
        "title": "Mechanical schedules"
      }
    ],
    "original_drawings": "Private; not included in the public example"
  },
  "summary": {
    "new_horizontal_lf": 220.5823,
    "existing_horizontal_lf": 9.6167,
    "new_supply_lf": 186.9739,
    "new_return_lf": 10.1317,
    "new_exhaust_lf": 23.476699999999997,
    "supply_cfm": 2630,
    "return_cfm": 1120,
    "new_exhaust_device_cfm": 1460,
    "existing_exhaust_device_cfm": 40,
    "terminal_faces": 19,
    "new_terminal_faces": 18,
    "new_duct_runs": 20,
    "scope_rows": 48,
    "open_issues": 10
  },
  "ducts": [
    {
      "id": "H-D01",
      "system": "supply",
      "size": "28 x 14 in",
      "quantity": 23.0767,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          1085.22,
          558.72
        ],
        [
          1500.6,
          558.72
        ]
      ]
    },
    {
      "id": "H-D02",
      "system": "supply",
      "size": "16 x 12 in",
      "quantity": 17.56,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          1143.6,
          558.72
        ],
        [
          1143.6,
          242.64
        ]
      ]
    },
    {
      "id": "H-D03",
      "system": "supply",
      "size": "14 x 10 in",
      "quantity": 33.0267,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          1143.6,
          342.6
        ],
        [
          549.12,
          342.6
        ]
      ]
    },
    {
      "id": "H-B01",
      "system": "supply",
      "size": "8 in",
      "quantity": 6.0267,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          549.12,
          342.6
        ],
        [
          549.12,
          234.12
        ]
      ]
    },
    {
      "id": "H-B02",
      "system": "supply",
      "size": "8 in",
      "quantity": 3.9867,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          621.9,
          342.6
        ],
        [
          621.9,
          414.36
        ]
      ]
    },
    {
      "id": "H-B03",
      "system": "supply",
      "size": "8 in",
      "quantity": 5.5533,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          826.86,
          342.6
        ],
        [
          826.86,
          242.64
        ]
      ]
    },
    {
      "id": "H-B04",
      "system": "supply",
      "size": "8 in",
      "quantity": 3.9667,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          837.36,
          342.6
        ],
        [
          837.36,
          414
        ]
      ]
    },
    {
      "id": "H-B05",
      "system": "supply",
      "size": "8 in",
      "quantity": 3.9667,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          981.18,
          342.6
        ],
        [
          981.18,
          414
        ]
      ]
    },
    {
      "id": "H-B06",
      "system": "supply",
      "size": "8 in",
      "quantity": 6.87,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          1143.6,
          242.64
        ],
        [
          1019.94,
          242.64
        ]
      ]
    },
    {
      "id": "H-B07",
      "system": "supply",
      "size": "8 in",
      "quantity": 8.0633,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          1197.18,
          558.72
        ],
        [
          1197.18,
          413.58
        ]
      ]
    },
    {
      "id": "H-B08",
      "system": "supply",
      "size": "8 in",
      "quantity": 10.3433,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          1131.48,
          558.72
        ],
        [
          1131.48,
          666.12
        ],
        [
          1052.7,
          666.12
        ]
      ]
    },
    {
      "id": "H-B09",
      "system": "supply",
      "size": "8 in",
      "quantity": 11.3567,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          1216.68,
          558.72
        ],
        [
          1216.68,
          763.14
        ]
      ]
    },
    {
      "id": "H-B10",
      "system": "supply",
      "size": "8 in",
      "quantity": 7.63,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          1476,
          558.72
        ],
        [
          1476,
          421.38
        ]
      ]
    },
    {
      "id": "H-B11",
      "system": "supply",
      "size": "8 in",
      "quantity": 4.4267,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          1332,
          558.72
        ],
        [
          1332,
          638.4
        ]
      ]
    },
    {
      "id": "H-B12",
      "system": "supply",
      "size": "8 in",
      "quantity": 4.4267,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          1476,
          558.72
        ],
        [
          1476,
          638.4
        ]
      ]
    },
    {
      "id": "H-B13",
      "system": "supply",
      "size": "8 in",
      "quantity": 17.82,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          1401.24,
          558.72
        ],
        [
          1401.24,
          879.48
        ]
      ]
    },
    {
      "id": "H-B14",
      "system": "supply",
      "size": "6 in",
      "quantity": 18.8737,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          1433.88,
          558.72
        ],
        [
          1433.88,
          250.98
        ],
        [
          1403,
          242.64
        ]
      ]
    },
    {
      "id": "H-R01",
      "system": "return",
      "size": "18 x 12 in",
      "quantity": 10.1317,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          1020.06,
          521.22
        ],
        [
          837.69,
          521.22
        ]
      ]
    },
    {
      "id": "H-E01",
      "system": "exhaust",
      "size": "10 in",
      "quantity": 19.83,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          1341.18,
          342.36
        ],
        [
          1191.9,
          342.36
        ],
        [
          1191.9,
          177
        ],
        [
          1234.2,
          177
        ]
      ]
    },
    {
      "id": "H-E02",
      "system": "exhaust",
      "size": "10 in",
      "quantity": 3.6467,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "New horizontal",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          1234.2,
          242.64
        ],
        [
          1234.2,
          177
        ]
      ]
    },
    {
      "id": "H-E03",
      "system": "existing_exhaust",
      "size": "4 in",
      "quantity": 9.6167,
      "unit": "LF",
      "sheet": "M101",
      "physical_page": 24,
      "status": "Existing / confirm extent",
      "basis": "Scaled horizontal centerline; no verticals or waste",
      "points": [
        [
          1327.5,
          193.5
        ],
        [
          1500.6,
          193.5
        ]
      ]
    }
  ],
  "rows": [
    {
      "id": "H-D01",
      "description": "Supply duct 28x14 in",
      "quantity": 23.0767,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-D02",
      "description": "Supply duct 16x12 in",
      "quantity": 17.56,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-D03",
      "description": "Supply duct 14x10 in",
      "quantity": 33.0267,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-B01",
      "description": "Supply duct 8 in round",
      "quantity": 6.0267,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-B02",
      "description": "Supply duct 8 in round",
      "quantity": 3.9867,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-B03",
      "description": "Supply duct 8 in round",
      "quantity": 5.5533,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-B04",
      "description": "Supply duct 8 in round",
      "quantity": 3.9667,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-B05",
      "description": "Supply duct 8 in round",
      "quantity": 3.9667,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-B06",
      "description": "Supply duct 8 in round",
      "quantity": 6.87,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-B07",
      "description": "Supply duct 8 in round",
      "quantity": 8.0633,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-B08",
      "description": "Supply duct 8 in round",
      "quantity": 10.3433,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-B09",
      "description": "Supply duct 8 in round",
      "quantity": 11.3567,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-B10",
      "description": "Supply duct 8 in round",
      "quantity": 7.63,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-B11",
      "description": "Supply duct 8 in round",
      "quantity": 4.4267,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-B12",
      "description": "Supply duct 8 in round",
      "quantity": 4.4267,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-B13",
      "description": "Supply duct 8 in round",
      "quantity": 17.82,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-B14",
      "description": "Supply duct 6 in round",
      "quantity": 18.8737,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-R01",
      "description": "Return duct 18x12 in",
      "quantity": 10.1317,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-E01",
      "description": "Exhaust duct 10 in round",
      "quantity": 19.83,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-E02",
      "description": "Exhaust duct 10 in round",
      "quantity": 3.6467,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "New horizontal",
      "note": "Horizontal centerline only. Vertical rises, offsets and fabrication fittings require elevations and coordinated shop drawings.",
      "category": "Ductwork"
    },
    {
      "id": "H-E03",
      "description": "Existing_Exhaust duct 4 in round",
      "quantity": 9.6167,
      "unit": "LF",
      "sheet": "M101",
      "basis": "Scaled horizontal centerline",
      "status": "Existing / confirm extent",
      "note": "Existing toilet exhaust route. Retained in the latest duct schedule; confirm any replacement extent. Excluded from new-duct total.",
      "category": "Ductwork"
    },
    {
      "id": "H-EQ01",
      "description": "Existing Carrier 48TMF008-A-501 rooftop unit, 7.5 ton: retain/service/rebalance",
      "quantity": 1,
      "unit": "EA",
      "sheet": "M401 / M102",
      "basis": "Schedule",
      "status": "Existing to remain",
      "note": "2630 SA / 1510 OA / 1120 RA CFM. MCA 40.1, MOCP 45, 208V/3ph VIF. No new RTU purchase in base scope.",
      "category": "Equipment"
    },
    {
      "id": "H-EQ02",
      "description": "New Greenheck G-120-VG exhaust fan or approved equal",
      "quantity": 1,
      "unit": "EA",
      "sheet": "M401",
      "basis": "Schedule",
      "status": "New; final variant pending",
      "note": "1500 CFM at 0.5 in w.g.; 115/1/60; MCA 8.2; MOCP 15; 65 lb. Includes compatible curb, backdraft damper, screen, isolation and speed control; disconnect by EC. Exact catalog variant requires supplier confirmation.",
      "category": "Equipment"
    },
    {
      "id": "H-T01",
      "description": "S-1 Titus TMS-AA 24x24 supply diffusers",
      "quantity": 13,
      "unit": "EA",
      "sheet": "M101 / M401",
      "basis": "Plan count",
      "status": "New",
      "note": "",
      "category": "Terminals"
    },
    {
      "id": "H-T02",
      "description": "S-2 Titus TMS-AA 12x12 supply diffuser",
      "quantity": 1,
      "unit": "EA",
      "sheet": "M101 / M401",
      "basis": "Plan count",
      "status": "New; exact model pending",
      "note": "Scheduled 12 x 12 in S-2 face retained. Exact material, frame and catalog model require clarification (H09).",
      "category": "Terminals"
    },
    {
      "id": "H-T03",
      "description": "R-1 Titus 50F 24x24 return grilles",
      "quantity": 2,
      "unit": "EA",
      "sheet": "M101 / M401",
      "basis": "Plan count",
      "status": "New",
      "note": "",
      "category": "Terminals"
    },
    {
      "id": "H-T04",
      "description": "E-1 Titus 50F 24x24 exhaust grilles",
      "quantity": 2,
      "unit": "EA",
      "sheet": "M101 / M401",
      "basis": "Plan count",
      "status": "New",
      "note": "",
      "category": "Terminals"
    },
    {
      "id": "H-T05",
      "description": "E-2 Titus 50F 12x12 exhaust grille / existing toilet fan interface",
      "quantity": 1,
      "unit": "EA",
      "sheet": "M101 / M401",
      "basis": "Plan count",
      "status": "Existing / confirm",
      "note": "",
      "category": "Terminals"
    },
    {
      "id": "H-A01",
      "description": "Manual balancing dampers at supply air devices",
      "quantity": 14,
      "unit": "EA",
      "sheet": "M101 / M301 / M401",
      "basis": "Count / specified scope",
      "status": "New",
      "note": "Verify damper access in finished ceiling; volume dampers also required in exhaust branches.",
      "category": "Accessories & closeout"
    },
    {
      "id": "H-A02",
      "description": "Exhaust branch balancing dampers",
      "quantity": 2,
      "unit": "EA",
      "sheet": "M101 / M301 / M401",
      "basis": "Count / specified scope",
      "status": "New",
      "note": "E-1 branch VD symbols.",
      "category": "Accessories & closeout"
    },
    {
      "id": "H-A03",
      "description": "Motorized damper MD-1 interlocked to EF-1",
      "quantity": 1,
      "unit": "EA",
      "sheet": "M101 / M301 / M401",
      "basis": "Count / specified scope",
      "status": "New",
      "note": "M101 keynote 10; coordinate power and controls.",
      "category": "Accessories & closeout"
    },
    {
      "id": "H-A04",
      "description": "Duct smoke detector System Sensor DH100ACDCLP or equal",
      "quantity": 1,
      "unit": "EA",
      "sheet": "M101 / M301 / M401",
      "basis": "Count / specified scope",
      "status": "New",
      "note": "Furnished/installed MC, wired EC for RTU shutdown.",
      "category": "Accessories & closeout"
    },
    {
      "id": "H-A05",
      "description": "Relocate/reuse thermostat and humidistat",
      "quantity": 1,
      "unit": "SET",
      "sheet": "M101 / M301 / M401",
      "basis": "Count / specified scope",
      "status": "Retain / relocate; condition pending",
      "note": "Provide new 7-day programmable thermostat if unsuitable; replacement is contingent.",
      "category": "Accessories & closeout"
    },
    {
      "id": "H-A06",
      "description": "Reuse return/space remote temperature sensor",
      "quantity": 1,
      "unit": "EA",
      "sheet": "M101 / M301 / M401",
      "basis": "Count / specified scope",
      "status": "Retain / relocate; condition pending",
      "note": "Replace if damaged; VIF before bid.",
      "category": "Accessories & closeout"
    },
    {
      "id": "H-A07",
      "description": "6x6 in door transfer grille",
      "quantity": 1,
      "unit": "EA",
      "sheet": "M101 / M301 / M401",
      "basis": "Count / specified scope",
      "status": "New",
      "note": "M101 keynote 6.",
      "category": "Accessories & closeout"
    },
    {
      "id": "H-A08",
      "description": "12x12 in exhaust riser to roof fan",
      "quantity": 1,
      "unit": "ASSEMBLY",
      "sheet": "M101 / M301 / M401",
      "basis": "Count / specified scope",
      "status": "New",
      "note": "Vertical length and elevation not given; do not treat as 0 LF.",
      "category": "Accessories & closeout"
    },
    {
      "id": "H-A09",
      "description": "4 in rigid dryer exhaust riser with gooseneck and backdraft damper",
      "quantity": 1,
      "unit": "ASSEMBLY",
      "sheet": "M101 / M301 / M401",
      "basis": "Count / specified scope",
      "status": "New",
      "note": "35 ft maximum equivalent length per drawing; actual vertical length, elbows and route require field measurement.",
      "category": "Accessories & closeout"
    },
    {
      "id": "H-A10",
      "description": "Existing toilet exhaust fan: protect and retain",
      "quantity": 1,
      "unit": "EA",
      "sheet": "M101 / M301 / M401",
      "basis": "Count / specified scope",
      "status": "Retain / relocate; condition pending",
      "note": "75 CFM on M401 vs 40 CFM at E-2 on M101.",
      "category": "Accessories & closeout"
    },
    {
      "id": "H-A11",
      "description": "RTU/EF/MD interlock and timeclock sequence",
      "quantity": 1,
      "unit": "SET",
      "sheet": "M101 / M301 / M401",
      "basis": "Count / specified scope",
      "status": "New",
      "note": "Coordinate MC/EC/GC responsibility; occupied-operation requirements per M401.",
      "category": "Accessories & closeout"
    },
    {
      "id": "H-A12",
      "description": "Certified testing, adjusting and balancing, written report",
      "quantity": 1,
      "unit": "LS",
      "sheet": "M101 / M301 / M401",
      "basis": "Count / specified scope",
      "status": "New",
      "note": "Balance all outlets and existing RTU; close out discrepancies with engineer.",
      "category": "Accessories & closeout"
    },
    {
      "id": "H-A13",
      "description": "RTU inspection, cleaning, MERV-13 filters and condensate flush",
      "quantity": 1,
      "unit": "LS",
      "sheet": "M101 / M301 / M401",
      "basis": "Count / specified scope",
      "status": "New",
      "note": "Existing drain replacement if required not quantified.",
      "category": "Accessories & closeout"
    },
    {
      "id": "H-A14",
      "description": "R-8 external insulation to concealed supply/return duct",
      "quantity": 653.684,
      "unit": "SF",
      "sheet": "M101 / M301 / M401",
      "basis": "Clear-inside duct perimeter x horizontal LF",
      "status": "Provisional horizontal surface",
      "note": "R-8 insulation horizontal surface only; final outside dimensions, thickness, verticals and fitting allowances require shop drawings.",
      "category": "Accessories & closeout"
    },
    {
      "id": "H-A15",
      "description": "Acoustic lining of mains",
      "quantity": 25.132,
      "unit": "LF",
      "sheet": "M101 / M301 / M401",
      "basis": "M30115ft supply + traced10.132ft return main",
      "status": "Provisional; drawing conflict H04",
      "note": "Carry M30115ft supply plus allreturn10.132ft. M101instead10fteach; resolve lining extent/thickness before shop drawing.",
      "category": "Accessories & closeout"
    },
    {
      "id": "H-A16",
      "description": "Fire/smoke dampers and firestopping at rated crossings",
      "quantity": 1,
      "unit": "LS",
      "sheet": "M101 / M301 / M401",
      "basis": "Conditional rated-wall crossing scope",
      "status": "Conditional",
      "note": "Fire/smoke damper count depends on actual rated barrier crossings; do not treat thisLS allowance as one damper. One LS is a scope package; damper count remains unmeasured.",
      "category": "Accessories & closeout"
    },
    {
      "id": "H-A17",
      "description": "Flexible diffuser connectors",
      "quantity": 1,
      "unit": "LS",
      "sheet": "M101 / M301 / M401",
      "basis": "Conditional concealed connectors",
      "status": "Conditional",
      "note": "Use rigid visible ducts. Concealed flex per final connection detail only, maximum5ft each; no supported installedLF given. One LS is a scope package, not a measured connector length.",
      "category": "Accessories & closeout"
    },
    {
      "id": "D-H01",
      "description": "Remove existing split AC system, indoor/outdoor units, line set and controls",
      "quantity": 1,
      "unit": "SYSTEM",
      "sheet": "M101 note 11 / M102 note 9",
      "basis": "Plan note",
      "status": "Demolish",
      "note": "Refrigerant recovery, roof patches and disconnect coordination included in scope.",
      "category": "Removal"
    },
    {
      "id": "HV-FIT",
      "description": "HVAC elbows, taps, transitions, caps and supports",
      "quantity": 1,
      "unit": "LS",
      "sheet": "M101 / E101",
      "basis": "Accessory scope",
      "status": "Coordinate",
      "note": "Fittings/supports included in full duct scope; shape/offset/shop pattern not finally defined by schematic plan. One LS records the scope package, not one fitting or a final fabrication count.",
      "category": "Accessories & closeout"
    },
    {
      "id": "HV-DROP",
      "description": "HVAC vertical rises and diffuser drops",
      "quantity": null,
      "unit": "LF",
      "sheet": "M101 / M102 / M301",
      "basis": "Unmeasured routing",
      "status": "Pending",
      "note": "Vertical lengths remain unmeasured. Field elevations, route and offsets are required; not zero LF.",
      "category": "Accessories & closeout"
    }
  ],
  "terminals": [
    {
      "id": "EA01",
      "tag": "E-1",
      "quantity": 1,
      "cfm": 875,
      "face": "24 x 24 in",
      "neck": "Not specified",
      "rfi": "H02",
      "sheet": "M101 / M401",
      "status": "New"
    },
    {
      "id": "EA02",
      "tag": "E-1",
      "quantity": 1,
      "cfm": 585,
      "face": "24 x 24 in",
      "neck": "Not specified",
      "rfi": "H02",
      "sheet": "M101 / M401",
      "status": "New"
    },
    {
      "id": "EA03",
      "tag": "E-2",
      "quantity": 1,
      "cfm": 40,
      "face": "12 x 12 in",
      "neck": "Not specified",
      "rfi": "H02",
      "sheet": "M101 / M401",
      "status": "Existing / confirm"
    },
    {
      "id": "RA01",
      "tag": "R-1",
      "quantity": 1,
      "cfm": 560,
      "face": "24 x 24 in",
      "neck": "Not specified",
      "rfi": "",
      "sheet": "M101 / M401",
      "status": "New"
    },
    {
      "id": "RA02",
      "tag": "R-1",
      "quantity": 1,
      "cfm": 560,
      "face": "24 x 24 in",
      "neck": "Not specified",
      "rfi": "",
      "sheet": "M101 / M401",
      "status": "New"
    },
    {
      "id": "SA01",
      "tag": "S-1",
      "quantity": 1,
      "cfm": 280,
      "face": "24 x 24 in",
      "neck": "8 in neck",
      "rfi": "H05",
      "sheet": "M101 / M401",
      "status": "New"
    },
    {
      "id": "SA02",
      "tag": "S-1",
      "quantity": 1,
      "cfm": 280,
      "face": "24 x 24 in",
      "neck": "8 in neck",
      "rfi": "H05",
      "sheet": "M101 / M401",
      "status": "New"
    },
    {
      "id": "SA03",
      "tag": "S-1",
      "quantity": 1,
      "cfm": 280,
      "face": "24 x 24 in",
      "neck": "8 in neck",
      "rfi": "H05",
      "sheet": "M101 / M401",
      "status": "New"
    },
    {
      "id": "SA04",
      "tag": "S-1",
      "quantity": 1,
      "cfm": 280,
      "face": "24 x 24 in",
      "neck": "8 in neck",
      "rfi": "H05",
      "sheet": "M101 / M401",
      "status": "New"
    },
    {
      "id": "SA05",
      "tag": "S-1",
      "quantity": 1,
      "cfm": 175,
      "face": "24 x 24 in",
      "neck": "8 in neck",
      "rfi": "",
      "sheet": "M101 / M401",
      "status": "New"
    },
    {
      "id": "SA06",
      "tag": "S-1",
      "quantity": 1,
      "cfm": 175,
      "face": "24 x 24 in",
      "neck": "8 in neck",
      "rfi": "",
      "sheet": "M101 / M401",
      "status": "New"
    },
    {
      "id": "SA07",
      "tag": "S-1",
      "quantity": 1,
      "cfm": 175,
      "face": "24 x 24 in",
      "neck": "8 in neck",
      "rfi": "",
      "sheet": "M101 / M401",
      "status": "New"
    },
    {
      "id": "SA08",
      "tag": "S-1",
      "quantity": 1,
      "cfm": 175,
      "face": "24 x 24 in",
      "neck": "8 in neck",
      "rfi": "",
      "sheet": "M101 / M401",
      "status": "New"
    },
    {
      "id": "SA09",
      "tag": "S-1",
      "quantity": 1,
      "cfm": 175,
      "face": "24 x 24 in",
      "neck": "8 in neck",
      "rfi": "",
      "sheet": "M101 / M401",
      "status": "New"
    },
    {
      "id": "SA10",
      "tag": "S-1",
      "quantity": 1,
      "cfm": 150,
      "face": "24 x 24 in",
      "neck": "8 in neck",
      "rfi": "",
      "sheet": "M101 / M401",
      "status": "New"
    },
    {
      "id": "SA11",
      "tag": "S-1",
      "quantity": 1,
      "cfm": 150,
      "face": "24 x 24 in",
      "neck": "8 in neck",
      "rfi": "",
      "sheet": "M101 / M401",
      "status": "New"
    },
    {
      "id": "SA12",
      "tag": "S-1",
      "quantity": 1,
      "cfm": 150,
      "face": "24 x 24 in",
      "neck": "8 in neck",
      "rfi": "",
      "sheet": "M101 / M401",
      "status": "New"
    },
    {
      "id": "SA13",
      "tag": "S-1",
      "quantity": 1,
      "cfm": 135,
      "face": "24 x 24 in",
      "neck": "8 in neck",
      "rfi": "",
      "sheet": "M101 / M401",
      "status": "New"
    },
    {
      "id": "SA14",
      "tag": "S-2",
      "quantity": 1,
      "cfm": 50,
      "face": "12 x 12 in",
      "neck": "6 in neck",
      "rfi": "H09",
      "sheet": "M101 / M401",
      "status": "New"
    }
  ],
  "equipment": [
    {
      "id": "EF1",
      "model": "Greenheck G-120-VG - exact variant pending",
      "quantity": 1,
      "cfm": 1500.0,
      "static": 0.5,
      "electrical": "115 V / 1 phase / MCA 8.2 A / MOCP 15 A - scheduled",
      "scope": "New / detail reference",
      "rfi": "H01, H02, H06, R01"
    },
    {
      "id": "EF2-EXISTING",
      "model": "Existing toilet exhaust - manufacturer unidentified",
      "quantity": 1,
      "cfm": null,
      "static": null,
      "electrical": "",
      "scope": "Existing / retain",
      "rfi": "H02"
    },
    {
      "id": "MD1",
      "model": "Motorized exhaust damper - manufacturer not selected",
      "quantity": 1,
      "cfm": null,
      "static": null,
      "electrical": "",
      "scope": "New / detail reference",
      "rfi": "H08"
    },
    {
      "id": "RTU1",
      "model": "Existing Carrier 48TMF008-A-501",
      "quantity": 1,
      "cfm": 2630.0,
      "static": null,
      "electrical": "208 V / 3 phase / MCA 40.1 A / MOCP 45 A - verify nameplate",
      "scope": "Existing / retain",
      "rfi": "H03, H04, H06, H07"
    }
  ],
  "issues": [
    {
      "id": "H01",
      "issue": "EF-1(N) on floor plan/schedule versus EF-2(N) on roof plan",
      "sheet": "M101 / M102 / M401",
      "action": "Confirm single new fan tag and location before ordering."
    },
    {
      "id": "H02",
      "issue": "Floor exhaust grilles 875 + 585 = 1,460 CFM versus fan 1,500 CFM; toilet E-2 shows 40 versus 75 CFM balance",
      "sheet": "M101 / M401",
      "action": "Engineer to issue corrected outlet and exhaust balancing values."
    },
    {
      "id": "H03",
      "issue": "Air-balance total supply row 2,400 CFM conflicts with 2,630 CFM RTU, ventilation table and 14 supply devices",
      "sheet": "M401 / M101",
      "action": "Use 2,630 as documented sum for review; request corrected schedule, no redesign implied."
    },
    {
      "id": "H04",
      "issue": "M101: 10 ft main acoustic lining versus M301: all return + first 15 ft supply",
      "sheet": "M101 / M301",
      "action": "Confirm lining extent, thickness and final clear-inside duct dimensions."
    },
    {
      "id": "H05",
      "issue": "M101: 8 in retail branches at 280 CFM versus M401 neck-size table 10 in for 201-400 CFM",
      "sheet": "M101 / M401",
      "action": "Engineer/shop drawings to reconcile; do not silently resize measured branches."
    },
    {
      "id": "H06",
      "issue": "No duct centerline elevations or roof/deck height supplied in reviewed plans",
      "sheet": "M101 / M102",
      "action": "Measure roof and ceiling heights, vertical rises, offsets and all crossing clearances."
    },
    {
      "id": "H07",
      "issue": "New duct base scope versus note offering existing-duct reuse after approval",
      "sheet": "M101",
      "action": "Base quote new ducts; quote approved reuse as separate alternate."
    },
    {
      "id": "H08",
      "issue": "Fan timeclock, lighting, RTU interlocks and occupied schedule note overlap",
      "sheet": "M401 / E101",
      "action": "Agree final control matrix and trade responsibility."
    },
    {
      "id": "R01",
      "issue": "Roof openings require landlord/owner roofing coordination; roof elevation and condition absent",
      "sheet": "M000 / M102",
      "action": "Field verify intake/exhaust 10 ft separations, curb supports and flashings; structural engineer review as required."
    },
    {
      "id": "H09",
      "issue": "Scheduled S-2 12 x 12 in face and TMS-AA designation need an exact product selection.",
      "sheet": "M401 / product submittal pending",
      "action": "Confirm material, frame, module and exact model with engineer and supplier. Keep the scheduled face and count pending clarification."
    }
  ],
  "limits": [
    "Horizontal centerlines are measured at the printed 1/4 in = 1 ft source scale. Verticals, offsets, fabrication fitting quantities and field routing are not settled.",
    "Insulation area uses clear-inside duct perimeter and horizontal length. Final outside dimensions, fitting surfaces, verticals and procurement waste remain open.",
    "LS means a lump-sum scope package, not a measured item count. Assembly counts do not establish a vertical length.",
    "Existing equipment and retained duct are identified separately and are not new purchases. Detailed equipment and terminal schedules expand the scope rows; do not add their counts twice.",
    "No procurement waste factor has been applied. No supplier quotes, labor rates or project bid prices are published.",
    "Source-route review and quantity arithmetic have been checked. Complete independent remeasurement of every route and resolution of the open questions are still required for bid release."
  ]
}