Design Blueprint: Flood-Safe Household Store — Raised-Fixed and Sealed-Buoyant Variants

DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. A buildable blueprint derived from the source paper 'A Household Flood-Safe Store for Settlements That Flood Every Year' (DOI 10.5281/zenodo.24109071). It specifies one household store (external envelope 1.2 m x 1.0 m x 0.8 m, internal volume 0.60 m3, inventory 200 kg grain, 25 kg seed, 10 kg documents and medicine) in two variants: a raised-fixed store with its floor at 1.68 m (failure probability 0.0175 per year, US$22.34 per household per year) and a sealed buoyant store tethered to rise to 2.50 m and anchored to a 20.0 kN design force set by the empty store (failure probability 0.00094 per year, US$44.10 per household per year), against a baseline expected annual loss of US$301.28 for ground-level storage. Moisture budget (3.70 g condensate per cooling cycle against a 500 g desiccant charge), assembly, siting, commissioning and maintenance procedures are given, and the failure regime is printed at full size: in Class IV floods (depth above 2.50 m, or deep fast or long floods as defined) both variants fail and only relocation serves. All numbers are taken from the source paper or computed in the accompanying compute.py.