Disaster Mesh Communications Kit — Design Blueprint: Solar LoRa Relay Network and Household Handsets for the First Week

DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. Build-ready blueprint derived from 'A Disaster Mesh Communications Budget for a Town Without Grid or Towers' (DOI: 10.5281/zenodo.24108997). Specifies 8 solar LoRa-class relays (12 m masts, 4.64 km spacing, 50 W panel and 512 Wh battery each, US$800 parts plus US$150 installation per relay) and one US$38 coded-message handset per household for a 7,500-household, 60.0 km2 town, carrying 11,796 coded 48-byte messages per day at 0.989 delivery and 2.57 s mean latency for US$321,860 total, US$42.91 per household. Includes bill of materials with source-stated costs, sizing and coverage rules, assembly, siting and commissioning, operating envelope, maintenance requirements, failure modes, and printed failure regimes at full size: shadowed districts need 24 m relays at the slowest SF12 rate, and the single-channel backhaul collapses below 90% delivery above 29,057 messages per day.