Beam Deflection — Cantilever, UDL 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-with-binding-errata

Evidence ID

t2-022

Effect

Computation or source lookup only

Input and validation requirements

The specification permits an E=0 input that makes the deflection denominator vanish, producing an undefined or infinite result unless rejected. It also specifies no actual formula branches, so a branch-switch test has no genuine alternate regime to evaluate.

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": {
    "w": "2 kN/m",
    "L": "3 m",
    "E": "200 GPa",
    "I": "8e-6 m^4"
  },
  "expected_outputs": {
    "delta": "0.01265625 m",
    "Mmax": "9000 N·m",
    "Vmax": "6000 N"
  },
  "working": "Convert w = 2 kN/m = 2000 N/m and E = 200 GPa = 200,000,000,000 N/m². L⁴ = 3⁴ = 81 m⁴. δ = (2000 × 81) / (8 × 200,000,000,000 × 8e-6) = 162000 / 12,800,000 = 0.01265625 m. Mmax = wL²/2 = 2000 × 3² / 2 = 2000 × 9 / 2 = 9000 N·m. Vmax = wL = 2000 × 3 = 6000 N."
}

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-tranche2/tranche2-results.json