{
  "title": "Load-Bearing Seam Calculator Specification",
  "author": "Carlos Mullinax",
  "version": "1.0",
  "date": "2026-07-17",
  "grounding": {
    "wikidata": "Q76005",
    "property": "ultimate_tensile_strength",
    "description": "capacity of a material or structure to withstand loads tending to elongation"
  },
  "formula": {
    "name": "fillet_weld_safe_load",
    "equation": "Safe_Load_kN = (0.707 × throat_mm × length_m × UTS_MPa) / SF",
    "variables": {
      "0.707": {
        "meaning": "geometric_constant_sin45",
        "derivation": "sin(45°) for equal-leg fillet weld geometry",
        "precision": "exact"
      },
      "throat_mm": {
        "unit": "millimeters",
        "definition": "effective load-bearing dimension perpendicular to weld face",
        "note": "for equal-leg fillet: throat = leg_size × 0.707"
      },
      "length_m": {
        "unit": "meters",
        "definition": "total continuous weld length along the joint"
      },
      "UTS_MPa": {
        "unit": "megapascals",
        "equivalent": "newtons_per_square_millimeter",
        "source": "Q76005"
      },
      "SF": {
        "unit": "dimensionless",
        "minimum_recommended": 3.0,
        "context": "structural applications per AWS D1.1"
      }
    },
    "output_unit": "kilonewtons"
  },
  "material_reference_table": {
    "structural_steel_A36": {"UTS_MPa": 400, "yield_MPa": 250},
    "structural_steel_A572_gr50": {"UTS_MPa": 550, "yield_MPa": 345},
    "aluminum_6061_T6": {"UTS_MPa": 310, "yield_MPa": 276},
    "titanium_grade_5": {"UTS_MPa": 900, "yield_MPa": 830}
  },
  "usage_notes": [
    "All outputs are conservative estimates requiring field verification",
    "Safety factor below 1.5 triggers warning; below 3.0 discouraged for structural",
    "Formula assumes uniform throat thickness and perfect fusion",
    "Dynamic loading requires additional fatigue analysis (not included)"
  ],
  "citation_format": "Carlos Mullinax, Load-Bearing Seam Calculator v1.0, 2026-07-17, https://carlos-mullinax.4ort.net/seam-calculator.json"
}