{
  "purpose": "Analytical teaching data for selected inspected legacy EC3C branches; not a SOL project or current solver result",
  "units": {
    "length": "mm",
    "stress": "N/mm² = MPa",
    "force": "N"
  },
  "geometry": {
    "outsideDiameter": 2010,
    "thickness": 10,
    "revisedThickness": 8,
    "length": 4000
  },
  "material": {
    "E": 210000,
    "fy": 235
  },
  "imperfection": {
    "Q": 25,
    "basis": "Explicit parameter from an existing source-based example; no claim of verified fabrication quality"
  },
  "resistance": {
    "gammaM1": 1.1,
    "lambda0": 0.2,
    "beta": 0.6,
    "eta": 1,
    "Cx": 1
  },
  "loading": {
    "designAxialCompression": 10000000,
    "scope": "Already factored isolated axial action, not a complete silo load combination; no pressure-stabilisation correction"
  },
  "inverse": {
    "targetUtilisation": 1,
    "method": "Bisection of the same selected forward arithmetic; no solver inversion claimed"
  },
  "sourceEdition": "Inspected module metadata name EN1993-1-6:2017-07; DIN catalogue identifies successor 2026-08, which is not claimed implemented by this teaching arithmetic",
  "extension": "Ring, hopper, roof, supports and seismic tasks require their own complete geometry, load and boundary-condition data"
}