Blueprint: Rainwater Roof and Storage System — Build Specification

Design blueprint — simulated, not measured — not built, not load-tested. Build specification for an integrated rainwater system (120.0 m2 roof plan at 22 degrees, 120.0 litre first-flush diverter removing a modelled 94.3% of roof wash-off load, 20,000 litre tank; computed 96.50% full-day reliability at 100 litres per day in a 450 mm rainfall regime, falling to 57.12% in drought at 60% rainfall), derived from the source paper DOI 10.5281/zenodo.24108714. Performance is computed, not measured; structural design is outside the source computation and must be checked separately. The source paper gives no prices, so the blueprint lists quantities without prices.