{
  "panel": {
    "height_mm": {
      "3": 128.5,
      "1": 39.65
    },
    "width_clearance_mm": 0.3,
    "thickness_mm": {
      "min": 1.6,
      "max": 2.0
    },
    "hole_inset_mm": 3.0,
    "hole_drill_mm": 3.2,
    "rail_grid_mm": 2.54,
    "mounting": {
      "load_n": 10,
      "deflection_mm": 0.5,
      "governing_material": "aluminum_5052",
      "governing_thickness_mm": 1.6,
      "materials": {
        "aluminum_5052": {
          "modulus_gpa": 70.3,
          "yield_mpa": 193
        },
        "fr4": {
          "modulus_gpa": 16.5,
          "flexural_strength_mpa": 414
        }
      }
    },
    "widths_hp": {
      "min": 1,
      "table_max": 104,
      "note": "No upper bound; the width table in spec/front-panels.md stops at table_max as an example."
    }
  },
  "board": {
    "height_3u_mm": 110.0,
    "thickness_mm": 1.6,
    "width_clearance_mm": 0.6,
    "parallel_gap_mm": 10.0,
    "right_angle_depth_mm": [
      30,
      35,
      40,
      45,
      50
    ]
  },
  "provenance": {
    "panel.height_mm.3": {
      "id": "EIS-PANEL-006",
      "kind": "inherited",
      "source": "Doepfer, Construction Details A-100, retrieved 2026-10-09"
    },
    "panel.height_mm.1": {
      "id": "EIS-PANEL-007",
      "kind": "inherited",
      "source": "Intellijel, 1U technical specifications, retrieved 2026-10-16"
    },
    "panel.thickness_mm": {
      "id": "EIS-PANEL-004",
      "kind": "inherited",
      "source": "Doepfer, Construction Details A-100, retrieved 2026-10-09",
      "note": "max is EIS-PANEL-004; min 1.6 mm is recommended practice"
    },
    "panel.hole_inset_mm": {
      "id": "EIS-PANEL-008",
      "kind": "inherited",
      "source": "Doepfer, Construction Details A-100, retrieved 2026-10-09"
    },
    "panel.hole_drill_mm": {
      "id": "EIS-PANEL-010",
      "kind": "inherited",
      "source": "Doepfer, Construction Details A-100, retrieved 2026-10-09"
    },
    "panel.width_clearance_mm": {
      "kind": "informative",
      "note": "Recommended practice; no requirement"
    },
    "panel.shortfall_mm": {
      "kind": "informative",
      "value_mm": 4.85,
      "note": "3U panel under three rack units"
    },
    "panel.mounting_hole_span_3u": {
      "id": "EIS-PANEL-009",
      "kind": "calculated",
      "value_mm": 122.5,
      "from": [
        "EIS-PANEL-006",
        "EIS-PANEL-008"
      ]
    },
    "board.height_3u_mm": {
      "kind": "informative",
      "value_mm": 110.0,
      "note": "Tallest 3U board inside the clearance; construction figure"
    },
    "board.parallel_gap_mm": {
      "kind": "informative",
      "note": "Construction figure; no requirement. See spec/boards.md."
    },
    "board.right_angle_depth_mm": {
      "kind": "informative",
      "note": "Construction figure; no requirement. See spec/boards.md."
    },
    "board.opening_3u_mm": {
      "kind": "informative",
      "value_mm": 110.0,
      "from": [
        "EIS-PANEL-006",
        "EIS-PANEL-012"
      ],
      "note": "3U opening between rail inner faces: panel height less twice the edge clearance"
    },
    "board.height_at_u": {
      "kind": "informative",
      "note": "Construction figure; no requirement. See spec/boards.md."
    },
    "board.edge_clearance_mm": {
      "id": "EIS-PANEL-012",
      "kind": "eis",
      "value_mm": 9.25
    }
  }
}