VIKING SHELTERS Draft v0.1SteelX micro-rebar dosage calculator · arched shelter shotcrete shell
1 · Structure
Length (ft)
Width (ft) RA = W/2
Shotcrete thickness (in) not final
Shell: 24 ga NuRay rib panel → 4 in spray foam → shotcrete with SteelX (no rebar mat). Dave's Apr 2026 note: ~6–8 in.
2 · SteelX dosage
Dosage (lb / cu yd) unconfirmed, ask Dave / manufacturer
SteelX 5:25 data sheet: shrinkage & temp 9–16 · supported structural 9–42 · unsupported structural 30–67 lb/yd³. Slump loss above 17 lb/yd³.
Waste / rebound (%) estimate
3 · Packaging, batching & price
Box size (lb) confirm
Truck / batch (cu yd)
Price ($ / lb, optional) Viking list price
Total SteelX
Math (check me)
Dosage references SteelX primary
| Source | Use | lb / yd³ |
|---|---|---|
| Dave (email to Rob, Apr 8 2026) | Shotcrete, past builds, 6–8 in | ~25 |
| SteelX 5:25 data sheet | Shrinkage & temp / supported structural / unsupported structural | 9–16 / 9–42 / 30–67 |
| ICC-ES ESR-5205 (SteelX 5:25) | Evaluated range (footings, slabs, plain concrete) | 9–36 |
| Helix ESR-3949 (reference only) | Type N etc. No shotcrete-specific number published | 9–34.5 |
Estimate only, not for construction. Dosage for a buried arch shell must come from the engineer of record (John) and/or SteelX. Geometry matches the shelter builder app (legs 32 in, half-round arch, 2 end walls, 21 sq ft door).