A home for the engineering model.
This branch records current architectural understanding: geometry, structure, environment, energy, transport, habitation and failure-tolerant maintenance. It is deliberately separate from Development Records, which preserve how ideas arose, and Universe Records, which preserve in-world artefacts and assertions.
A model record may be revised, contradicted or superseded without erasing its provenance. Classification identifies subject location; it does not declare canon or certainty.
600.20 subject branches
| Path | Subject |
|---|---|
600.20:05 | General engineering doctrine and cross-system design principles. |
600.20:10 | General arrangement, scale and global geometry. |
600.20:20 | Rotation, artificial gravity and reference frames. |
600.20:30 | Primary structure, rings, segmentation and structural interfaces. |
600.20:40 | Inner-rim geology, geological support and pressure-bed systems. |
600.20:50 | Atmosphere, environmental retention and illumination cycle. |
600.20:60 | Energy collection, distribution, thermal management and rejection. |
600.20:70 | Transport, access, transit interfaces and vertical crossings. |
600.20:80 | Habitation geography, zoning, settlements and occupied environments. |
600.20:90 | Maintenance architecture, redundancy, sacrificial systems and fault containment. |
Available Station records
600.20:05:01— Engineered-environment principle600.20:10:01— Global geometry and scale600.20:20:01— Rotation, gravity and passive persistence600.20:20:02— Local induced-gravity work zones600.20:30:01— Segmented ring structure and sacrificial interfaces600.20:30:02— Radially widening support geometry600.20:30:03— Deep vertical service voids and non-floor structural volume600.20:40:01— Geological pressure-bed support600.20:40:02— Compartmentalised pressure-bed support600.20:40:03— Renewable carbon tribological surface600.20:50:01— Open atmosphere and illumination cycle600.20:50:02— Material closure and waste-to-resource processing600.20:50:03— Underrim artificial atmospherics and cavern microclimates600.20:60:01— Stellar energy collection and thermal rejection600.20:70:01— Layered transit and vertical crossings600.20:80:01— Habitation geography and settlement gradient600.20:80:02— Persistent ecology and biological structural integration600.20:80:03— Infrastructure-following ecological spread600.20:90:01— Fracture control and expendable fault containment600.20:90:02— Locality-based maintenance and service isolation600.20:90:03— Adaptive collapse and arterial reconnection600.20:90:04— Indirect-state verification under degraded instrumentation
Classify first; then preserve.
New Station ideas, concepts, references and designs are assigned to the appropriate Archive branch as part of the normal design workflow. Working ideas may remain explicitly provisional. The Archive should preserve the reasoning, dependencies, failure behaviour and revision lineage rather than recording conclusions alone.
Engineering drawing identifiers such as SHC-ENG-001 may coexist with Archive classification. The drawing identifier names the engineering object; the 600.20:xx path locates its subject within the catalogue.
Depth follows evidence.
Children beneath these branches use the established two-digit extension form, for example 600.20:40:01. No child address is reserved until an actual record makes the distinction useful.