The OBCL concept
A custom prefabricated construction — the decisive advantage.
The OBCL concept is a custom prefabricated construction. In each of our product ranges, we offer generic models that meet the 20/80 rule, while remaining attentive to adapt each project to your constraints. Our International Design Office validates the plans, materials, colors, and constraints with you, then adapts your project to local standards.
The 5 phases of the project
From determining the need to on-site assembly.
Determining the need
Our International Design Office validates the plans, materials, colors, constraints with you and adapts to local standards.
Engineering — 2 to 3 weeks
3D modeling of each part, complete assembly plans. Bolted assemblies, no welding.
Manufacturing — 6 to 8 weeks
Galvanized thin steel frames (partner factories in China and Egypt), sandwich panels and steel trays (Italy). Packed in containers.
Delivery — a few days to 4 weeks
Containers are delivered to the nearest seaport to the destination.
On-site assembly
Beams and frameworks fixed by chemical anchoring on prepared concrete slab. Housing: 1 to 7 days. Buildings: 3 to 6 weeks.
Technical performance and comfort
A durable, comfortable, and high-performance construction.
Galvanized thin steel structure
Cyclonic, seismic, and corrosion resistance.
50 mm sandwich panels
Thermal transmission 0.44 W/m².K — thermal resistance 2.27 m².K/W.
Photovoltaic option
Energy autonomy possible depending on the project.
Durability > 20 years
Garantie 10 ans, conception pour > 20 ans.
Modular and removable
Evolvable, expandable, movable, reusable.
Suitable for extreme climates
Tropical, desert, polar — projects in 60 countries.
OBCL vs concrete construction
Seven axes that make the difference.
1. Construction timelines
Concrete:6 to 18 months, depending on weather and local labor.
OBCL:factory production in parallel, assembly in a few days to weeks.
👉 Gain x10 to x20
2. Total cost of ownership (TCO)
Concrete:high cost, frequent overruns in crisis areas.
OBCL:industrialized production, kit transport, reduced labor.
👉 30 to 60% overall savings
3. Deployment in rural or isolated areas
Concrete:requires water, cement, heavy equipment, logistical stability.
OBCL:assembly without heavy machinery, less dependent on local resources.
👉 Operational immediately
4. Flexibility and modularity
Concrete:fixed structure, costly modifications.
OBCL:evolving modules, easy extension, possible reconfiguration.
👉 Suitable for evolving situations
5. Reversibility and reuse
Concrete:definitive, non-dismantlable.
OBCL:dismantlable, movable, reusable on other sites.
👉 Investment optimization
6. Environmental impact
Concrete:very high carbon footprint (cement), high consumption.
OBCL:less material, optimized production, solar option.
👉 More sustainable solution
7. Adaptability to extreme conditions
Concrete:sensitive to cracking in seismic zones, complex to adapt.
OBCL:anti-seismic, anti-cyclonic, anti-corrosion steel structure.
👉 More resilient in unstable environments
Thermal focus — sandwich panel vs concrete
At equal thickness, concrete cannot compete thermally.
| Criterion | OBCL sandwich panel (50 mm) | Classic concrete wall (~20 cm) |
|---|---|---|
| Thermal coefficient (U) | 0.44 W/m².K | ~ 1.7 to 2.5 W/m².K |
| Thermal resistance (R) | 2.27 m².K/W | ~ 0.4 to 0.6 m².K/W |
| Conductivity (λ) | ~ 0.022–0.028 W/m.K | ~ 1.75 W/m.K |
| Required thickness | 50 mm | 200 mm |
| Implementation time | Prefabricated (immediate) | Pouring + drying (28 days) |
| Structural weight | Light | Very heavy |
| Thermal inertia | Low to controlled | Very high ("oven" effect) |
| Seismic resistance | Very good (steel) | Average (possible cracking) |
| Moisture / corrosion | Treated (galvanized + insulation) | Sensitive |
| Flexibility / modularity | Very high | None |
| Maintenance | Low | Medium to high |
"A concrete wall protects. A sandwich panel protects AND insulates."
In the current context — rare and expensive energy, extreme temperatures — thermal performance is no longer a comfort, it is a vital issue.
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