{
  "physical_measurements": 0,
  "door_opening_x_full_m": [
    1.9,
    2.9
  ],
  "front_duct_shift_support_x_full_m": [
    0.75,
    1.9
  ],
  "rear_duct_shift_support_x_full_m": [
    3.0,
    4.45
  ],
  "maximum_declared_centreline_change_in_door_zone_m": 0.0,
  "section_dimensions_changed": false,
  "ruled_station_spacing_full_m": 0.1,
  "door_boundary_stations_present": true,
  "interpretation": "The smooth shift laws are identically zero throughout the existing door-opening interval; both endpoint stations are retained. This preserves that region of the duct layout, not human ingress, egress, hinge strength or a structural door qualification."
}