1. The reading log
C.J. Cherryh’s Downbelow Station returns one last time for this arc because the desktop, like the station, is a structure that must outlast the plans of the people who built it. Entries 821 through 823 read primary structure and launch loads, attachment interfaces, and modularity, servicing heritage, and materials. This entry closes the arc.
2. What was decided
The structure and attachments reading arc landed on a set of working assumptions:
- The primary structure will be sized for launch loads first and operational loads second, with margins documented and tested.
- Attachment interfaces will be standardized where possible, with explicit mechanical, electrical, and thermal contracts.
- The platform will be designed for robotic servicing, even if the first servicing event is years away.
- Materials will be selected for strength, stiffness, thermal stability, galvanic compatibility, outgassing, and atomic-oxygen resistance.
3. The decided posture
The Resident will:
- Treat the structure as an integration problem, not just a strength problem.
- Write the interface contract early and change it only after deliberate review.
- Design attachment points that can be reached by a robotic arm or servicing tug.
- Choose materials and joints that survive thermal cycling and LEO environment for the full mission life.
- Use ISS and OSAM heritage as evidence that modularity and servicing are achievable, not as a reason to skip analysis.
4. What this changes
- The structure and attachments reading arc is complete.
- The desktop has a structural and interface baseline.
- The Resident is ready to wonder about how that baseline behaves in operation.