Working architectural principle; detailed arrangement remains open.
| Classification | 600.20:30:03 |
|---|---|
| Model state | Materially developed working model |
| Recovered | 24 September 2026 |
| Parent | 600.20:30 — primary structure, rings, segmentation and structural interfaces |
| Open parameters | Final rim depth; frequency and dimensions of major voids; structural bay sizes; placement of machine halls, access trunks, bridges and service decks; relationship to pressure cells and fracture boundaries. |
Deep Station volume is not a stack of ordinary floors.
As the inner-rim cross-section was revised to accommodate geological strata, pressure-supported interfaces and major structural masses, the earlier mental model of thousands of conventional horizontal floors became less useful. The deep interior is better treated as a structural and industrial volume containing very large voids, vertical shafts, isolated platforms, machine halls, bridges, trunks and local floor systems where a function actually requires them.
This does not establish that the entire deep rim is open volume. It rejects only the assumption that radial depth must be continuously subdivided into regular occupied storeys.
Structure and machinery need volume more than they need floor count.
The revised geological-support model moves substantial structure beneath the inhabited strata and introduces compartmentalised pressure cells, vertical pathways and discontinuities that should not be crossed casually by rigid occupied construction. Large service voids allow primary supports, conduits, lift trunks, pressure-cell boundaries, inspection routes and major machinery to coexist without forcing every radial interval into a building-like floor plate.
The model also restores relevance to an older Station image: very large vertical industrial spaces organised around singular machinery or structural constructs. That image is retained here as an architectural consequence, not as evidence for any one named engine-room design.
The voids are consequences of the support model.
This direction depends on the segmented primary structure (600.20:30:01), radially widening support geometry (600.20:30:02), geological pressure support (600.20:40:01 and 600.20:40:02), vertical transit architecture (600.20:70) and fracture containment (600.20:90). A future sectional drawing should test these systems together rather than drawing the voids as aesthetic caverns detached from load paths.
Open volume changes access and containment.
Large vertical spaces reduce the number of intermediate floor plates available to arrest falling debris, fire, fluid release or local atmospheric movement. Conversely, fewer continuous floors may reduce unwanted rigid bridges across structural and pressure-cell boundaries. The design therefore creates a trade: service access, compartment doors, catch structures, local decks and emergency routes must provide containment without recreating a continuous mechanically coupled stack.
The architecture is a topology, not yet a section drawing.
No universal shaft size, bay spacing, engine-room location or void percentage has been fixed. The provisional 8–9 km depth discussed elsewhere remains illustrative rather than canonical. It is also unresolved which deep spaces are pressurised, locally enclosed, open to service atmosphere or isolated entirely.
Recovered from design discussion; cultural comparison remains separate evidence.
The originating discussion explicitly contrasted regular floors with immense vertical industrial/test-shaft-like volume and connected that revision to an older concept for a towering central machinery space. The architectural conclusion is recorded here. Any named fictional or cultural visual comparison used during that discussion belongs in the 750 Cultural References collection if accessioned, rather than being treated as engineering evidence.