1.6 KiB
Executable File
1.6 KiB
Executable File
Example: Bridge Engineering
Status: Draft Phase: The Bedrock Phase
What This Example Demonstrates
Engineering context preservation (OE-0003), the context record structure, and verification.
The Observation
A bridge designed without a preserved context record — one that records only the final design but not the reasoning, alternatives, constraints, and verification — creates risk for future engineers who must maintain, modify, or load-rate the bridge.
Context Record Applied
A well-preserved bridge engineering context record would contain:
| Field | Example Content |
|---|---|
| Decision | Use a truss design with a 40m span |
| Observation | Site survey showed 40m crossing required; bedrock at 12m depth |
| Alternatives | Cable-stayed (rejected: higher maintenance cost), arch (rejected: insufficient abutment capacity) |
| Constraints | Maximum load 40 tonnes; environmental: tidal zone; economic: prefabrication required |
| Reasoning | Truss allows prefabrication, meets load requirements, and can be erected in tidal window |
| Verification | Load testing to 1.5x design load; finite element analysis corroborated by physical test |
| Lineage | Builds on standard truss design from [prior project reference] |
| Assumptions | Steel grade S355 available; corrosion protection maintains for 50-year design life |
Self-Fading Assessment
This example transports the reader from the abstract context record structure (OE-0003) to a concrete instance. Once the reader understands how each field maps to a real engineering decision, the example has served its purpose.