Public evidence

mechanical.statics.beam_deflection

Machine-checked verification for calculation version 1.0.0 · tier engine_tested

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Verification

4/4 calculation tests · Production surface contract 6/6

Golden tests 2 / 2
Boundary tests 2 / 2
Property tests 0 / 0
Production surface contract 6 / 6
Engine tested Yes
Source checked Yes
Artifact integrity PASS
Production attestation Embedded snapshot: unpublished · Build schema 1.0.0 ready · Semantic contract ✓ · Attestation report not published on origin · Live production status STALE (8 capabilities; 189 remain CURRENT) @ 2026-09-23T21:48:15.717Z
Semantic contract PASS
Evidence attested at 2026-09-23T02:27:54.588Z
Last production check 2026-09-23T02:27:54.588Z
Public / cache —
Origin —
Supplemental domain review Not performed
Named expert review Not performed

release artifacts aligned PASS
schema output required declared PASS
schema valid input executes PASS
engine success output validates schema PASS
schema rejects incomplete input PASS
rest success payload validates schema PASS

Fingerprint sha256:da271ad89b11e199774e0c0995f885e1d7fd7eefeb22f5578159a0d1c9103125

Input schema sha256:1f0c7eb0eb439253686303d528546244cf749deafa5afb6dc92b0ba1dfa64785 · Output schema sha256:f5c87e8200d0ee307950a0da236651f44138997ba3fc46612c1096871a4d0c7c · Build-time SHA-256 digests prove published artifacts agree with each other (release_integrity.scope=workspace). Production attestation GETs canonical URLs twice (public/cached view and origin), including Capability HTML, via npm run attest:production --write (published at /.well-known/calculatorx-production-attestation.json) and fails if the public Capability page advertises a different calculation_version. This is artifact consistency, not an independent immutable release log.

Build & scope

Engine identity and declared limitations.

Tool: beam-deflection
Engine: beam-deflection
Engine build: 2026-09-23
Evidence core: 2026-09-23T21:44:50.440Z
Rendered: 2026-09-23T21:48:01.337Z
Last reviewed: —

Limitations

Simply supported span
One concentrated load at midspan
I is an input
Not a cantilever or a distributed load

Sources

Standards and references supporting this tool specification. Methods are listed separately — they are algorithms, not bibliographic sources.

Hibbeler, Mechanics of Materials — Deflection of beams — simply supported beam with a concentrated load at midspan
Supports: The midspan deflection is P L³ / (48 E I) when the load sits at the center of a simply supported span.

Published checks

Golden, boundary, and property cases included in this evidence build.

ID	Kind	Status	Detail
`golden-midspan`	golden	pass	Expected delta=8 · model=beam_deflection · Actual delta=8 · model=beam_deflection · P=48 · L=2 · E=1 · I=1 · solver=simply supported midspan · convention=Simply supported span with one concentrated load at midspan. δ = P L³/(48 E I). Positive P is the positive deflection direction. I is an input. A cantilever and a distributed load are their own pages.
`golden-sign`	golden	pass	Expected delta=-8 · Actual delta=-8 · model=beam_deflection · P=-48 · L=2 · E=1 · I=1 · solver=simply supported midspan · convention=Simply supported span with one concentrated load at midspan. δ = P L³/(48 E I). Positive P is the positive deflection direction. I is an input. A cantilever and a distributed load are their own pages.
`boundary-zero-span`	boundary	pass	Expected VALUE_MUST_BE_POSITIVE · Actual VALUE_MUST_BE_POSITIVE
`boundary-missing`	boundary	pass	Expected MISSING_REQUIRED_INPUT · Actual MISSING_REQUIRED_INPUT