Undergoing certification testing to ДСТУ 9329:2025
A monolithic reinforced-concrete half-egg shelter. 8–10 people, 3.2 m internal diameter, installed in one day, 100 kPa design class.
Protection from fragments, blast wave and structural debris. Protection from a direct hit is not claimed.
Why an egg
We did not invent the geometry. A doubly-curved shell is the oldest engineering answer to external pressure.
In a doubly-curved shell a blast load resolves into almost pure compression. Concrete is at its best in compression — up to ten times stronger than in tension. A flat wall works in bending instead, and needs heavy reinforcement to survive it.
Our shelter is one continuous pour. Assembled products are built from 13–30 blocks: every joint means sealing, fasteners and a potential weak point under dynamic load.
A flat wall square to the blast front takes the full reflected pressure. A curved surface sheds the wave tangentially, so the structure sees substantially lower load at the same yield.
Tiers
The same monolithic shell. The difference is the door, the valves and the filtration.
| Base | Premium — Finnish protection inside | |
|---|---|---|
| Shell | Monolithic C40/50, single pour | Monolithic C40/50, single pour |
| Blast door | Ukrainian-made | Temet (Finland) |
| Blast valves | Ukrainian-made | Temet (Finland) |
| Filtration | Natural + mechanical ventilation | Temet CBRN filtration unit |
| CO₂ scrubber | — | Optional |
| Air-tightness | Standard | Air-tight class, pressure tested |
| Backup power | 48 h for light and communications | 48 h, extendable on request |
| Benches and fit-out | Yes | Yes |
How it happens
People, site type, budget and timing. A twenty-minute call.
Crane and truck access, soils, water table, distances to buildings and utilities.
One continuous pour at our yard in Kyiv region, then concrete curing.
Under 4 m overall — a standard low-loader, no oversize permit.
Gravel pad, crane placement, ventilation and power connection.
Earth berm, planting, exterior ornament and interior finish.
Who it's for
A private yard, 8–10 people, a quiet night instead of the hallway.
Read moreThe employer's duty to provide shelter for workers.
Read moreSubventions, Prozorro, a shelter next to the classroom.
Read moreTransparent costing, reporting, installation photos for the file.
Read moreIdentity
A protective object should look like a cultural one, not like a bunker. Exterior ornament from traditional motifs or from a community's own sketch.
Forty triangles
Endless line
Eight-point star
Wave
Oak leaf
Net
Inside: text, artwork and quiet colours chosen by the family or the community.
Questions
Leave your details — an engineer calls back within the working day with an indicative price.
Undergoing certification testing to ДСТУ 9329:2025
Testing with the State Emergency Service is in progress. We do not call the shelter certified until the document is in our hands.
Protection from fragments, blast wave and structural debris. Protection from a direct hit is not claimed.