curl --request POST \
  --url https://api.iotools.cloud/v1/tool/weld-size-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "mode": "size",
  "jointLoad": "50",
  "weldLength": "200",
  "electrode": "E70XX",
  "thickerPartThickness": ""
}
'

{
  "tool": "weld-size-calculator",
  "tool_version": "1.0.1",
  "outputs": {
    "legSize": "3 mm",
    "throatThickness": "2.12 mm",
    "loadCapacity": "61.47 kN",
    "summaryTable": [
      {
        "metric": "Mode",
        "value": "Find required weld size"
      },
      {
        "metric": "Total effective weld length",
        "value": "200.00 mm"
      },
      {
        "metric": "Electrode",
        "value": "E70XX (483 MPa)"
      },
      {
        "metric": "Allowable shear stress (0.30 × Fexx)",
        "value": "144.90 MPa"
      },
      {
        "metric": "Fillet weld leg size",
        "value": "3 mm"
      },
      {
        "metric": "Effective throat thickness",
        "value": "2.12 mm"
      },
      {
        "metric": "Load capacity",
        "value": "61.47 kN"
      }
    ],
    "notes": "Calculated minimum leg size = required throat ÷ 0.707 = 1.73 mm ÷ 0.707 = 2.44 mm — rounded up to the nearest practical fillet size (3 mm).\nAt the recommended 3 mm leg, this weld carries 61.47 kN — a margin of 11.47 kN (23%) above the 50.00 kN design load.\nThis uses the AISC/AWS allowable-stress-design shear check (0.30 × electrode tensile strength) for a longitudinally loaded fillet weld — transverse loading, fatigue and other code provisions (AWS D1.1 §5, Eurocode 3) can change the governing size. Verify against your project's applicable code and a qualified welding engineer before fabrication."
  },
  "credits_used": 3,
  "credits_remaining": null
}