{
  "basis": "Actual 3D vertices and binary GLB, not the realistic image or plan labels",
  "checks": {
    "actual_mesh_and_glb_audited": true,
    "downloadable_glb_matches_actual_stair_mesh": true,
    "all_stair_parts_outside_reflection_room_footprint": true,
    "all_flights_guards_landings_supports_outside_deck_footprint": true,
    "minimum_all_component_gap_at_least_3ft": true,
    "upper_flight_not_below_top_connection": true,
    "all_stair_parts_outside_lower_health_footprint": true,
    "only_top_level_connection_touches_deck": true,
    "both_flights_straight": true,
    "flights_parallel_and_opposing": true,
    "both_flights_parallel_to_long_glass_wall": true,
    "both_flights_touch_same_rear_return_landing_in_plan": true,
    "return_landing_at_half_story": true,
    "top_to_bottom_rise_is_13ft": true,
    "route_has_four_half_foot_transition_risers": true
  },
  "measurements_ft": {
    "flight_edge_to_actual_deck_slab": 3.440000141347536,
    "minimum_deck_gap_including_all_stair_guards_supports_and_footings": 3.0900001413475344,
    "all_stair_parts_to_upper_reflection_room_minimum_x_separation": 4.650000000000002,
    "top_level": 12.0,
    "midlanding_level": 5.5,
    "bottom_level": -1.0,
    "story_rise": 13.0
  },
  "stair_mesh_part_count": 158,
  "glb_max_vertex_error_m": 4.7409620584915046e-07,
  "flight_centerline_axes_xy": [
    [
      0.0,
      -1.0
    ],
    [
      0.0,
      1.0
    ]
  ],
  "max_straightness_deviation_ft": 2.727272736535724e-07,
  "footprints_ft": {
    "hexagon": [
      [
        -12.01405707067377,
        10.223152441446803
      ],
      [
        0,
        3.2868333576337747
      ],
      [
        0,
        -10.585804809992283
      ],
      [
        -12.01405707067377,
        -17.52212389380531
      ],
      [
        -24.02811414134754,
        -10.585804809992283
      ],
      [
        -24.02811414134754,
        3.2868333576337747
      ]
    ],
    "reflection_deck_outer": [
      [
        -12.01405707067377,
        15.996655133343062
      ],
      [
        4.999999999999998,
        6.173584703581904
      ],
      [
        4.999999999999998,
        -13.472556155940412
      ],
      [
        -12.01405707067377,
        -23.29562658570157
      ],
      [
        -29.028114141347537,
        -13.472556155940412
      ],
      [
        -29.028114141347537,
        6.173584703581904
      ]
    ],
    "reflection_stair_first_flight": [
      [
        -32.52811414134754,
        1.1735847035819038
      ],
      [
        -37.52811414134754,
        1.1735847035819038
      ],
      [
        -37.52811414134754,
        -9.826415296418096
      ],
      [
        -32.52811414134754,
        -9.826415296418096
      ]
    ],
    "reflection_stair_second_flight": [
      [
        -38.52811414134754,
        -9.826415296418096
      ],
      [
        -43.52811414134754,
        -9.826415296418096
      ],
      [
        -43.52811414134754,
        1.1735847035819038
      ],
      [
        -38.52811414134754,
        1.1735847035819038
      ]
    ],
    "reflection_stair_top_landing": [
      [
        -37.52811414134754,
        1.1735847035819038
      ],
      [
        -32.52811414134754,
        1.1735847035819038
      ],
      [
        -29.028114141347537,
        1.1735847035819038
      ],
      [
        -29.028114141347537,
        6.173584703581904
      ],
      [
        -37.52811414134754,
        6.173584703581904
      ]
    ],
    "stair_mid_landing": [
      [
        -32.52811414134754,
        -14.826415296418098
      ],
      [
        -32.52811414134754,
        -9.826415296418098
      ],
      [
        -43.52811414134754,
        -9.826415296418098
      ],
      [
        -43.52811414134754,
        -14.826415296418098
      ]
    ],
    "stair_bottom_landing": [
      [
        -38.52811414134754,
        1.173584703581902
      ],
      [
        -38.52811414134754,
        6.173584703581902
      ],
      [
        -43.52811414134754,
        6.173584703581902
      ],
      [
        -43.52811414134754,
        1.173584703581902
      ]
    ]
  },
  "physical_model_geometry_changed": true,
  "change": "Stair and path shifted 6 inches outward; top bridge lengthened; room/deck/buildings retained"
}