Radial support geometry evolution

Recovered development path; current conclusion lives in the Model collection.

The inner rim is the Station's minimum circumference.

The design discussion began with a simple geometric consequence that had previously been treated mostly as negligible at global scale: moving downward/outward from the inhabited inner surface increases radius and therefore circumference. Across only several kilometres this change is minute compared with the roughly 1.5 million km Station radius, but it is continuous and real.

The important conceptual shift was to stop treating that increase solely as a correction in drawings. At structural scale it represents additional local volume that the deep ring can deliberately consume.

Supports need not remain constant-section.

Once the gained circumference was recognised as usable space, truncated-pyramidal, conical and related widening members were proposed. A support could remain comparatively narrow near the inhabited/geological side, where space and interfaces are sensitive, then broaden toward deeper layers where the circumference is larger and load can be spread over a greater footprint.

The recovered proposal was geometric rather than prescriptive. The established result is permission to widen with radius; no universal cone, pyramid, taper angle or repeating support grid was selected.

The idea immediately collided with the Station's fault philosophy.

The support proposal could not be considered in isolation because the developing Station model already relied on segmented rings, pressure-supported geology and sacrificial fault boundaries. A single enormous rigid member spanning those systems might distribute ordinary load well while also transmitting displacement across interfaces deliberately intended to decouple failures.

This turned the question from “what shape should the column be?” into “where may a radial load path remain continuous, and where must it articulate, terminate, slide or transfer load?” That unresolved interface problem is now one of the reasons the inner-rim section is suitable for functional visualisation.

Geometry is firmer than implementation.

Established: deeper structural layers occupy a slightly greater circumference, and that difference can be exploited rather than ignored. Working: widening radial members are a plausible way to use some of the gained space for load distribution. Open: final rim depth, member spacing, taper, materials, joints, compliant interfaces, pressure-cell relationships and fracture-boundary crossings.

A provisional 8–9 km structural depth appeared during the discussion as a useful section for reasoning. It remains illustrative, not a fixed Station dimension.

A stronger support can make a worse fault bridge.

The design discussion therefore rejected the naive inference that a broader monolithic base is automatically preferable. In ordinary operation a widening member may spread load; during differential settlement, pressure-cell loss or ring displacement, the same member could carry destructive forces into otherwise independent structure. Any mature design must preserve the Station's preference for bounded failure.

This record explains why the current model exists.

The present engineering conclusion belongs in 600.20:30:02. Future calculations of member geometry or load paths remain Model work. Real structural precedents used to test the proposal belong in 700 Factual References. Any Tribunal drawing or specification represented as an artefact of the Solar Habitation Complex belongs in 100 Universe Records.