Welded Joint Strength Calculator implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t5-042

Effect

Computation or source lookup only

Input and validation requirements

The zero weld-size input produces a division-by-zero undefined result and must be rejected. The zero-load case also exposes an infinite, non-finite safety-factor representation. In addition, signed-load handling is convention-dependent unless the interface explicitly distinguishes direction from stress magnitude.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "load_type": "direct shear",
    "F": 10000,
    "F_units": "N",
    "h": 6,
    "h_units": "mm",
    "L": 100,
    "L_units": "mm",
    "allowable_weld_stress": 180,
    "allowable_units": "MPa"
  },
  "expected_outputs": {
    "tau": 23.5738,
    "tau_units": "MPa",
    "SF": 7.6356
  },
  "working": "Effective throat = 0.707×h = 0.707×6 = 4.242 mm. Effective throat area = 4.242×100 = 424.2 mm². τ = F/area = 10000/424.2 = 23.5738 N/mm² = 23.5738 MPa. SF = allowable/τ = 180/23.5738 = 7.6356."
}

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche5/tranche5-results.json