
Class 8 Windproof Prefab Container 2-Layer Office from Ante House, a China manufacturer with direct factory control, ensures supply chain quality. As a reliable supplier, we integrate full production (welding, painting, panel lines) to deliver wind-resistant two-storey units. 30-year frame, 2-year warranty. Proven globally. Ante House: quality built in.
The Class 8 Windproof Prefab Container 2-Layer Office is a ready-to-use modular building system that creates stable double-floor office spaces. It combines pre-engineered steel frames with high-density sandwich panels. Each unit is manufactured in a controlled factory environment, then shipped and assembled on site. This product is intended for project sites, remote work locations, school expansions, emergency response bases, and commercial complexes that need a second floor without heavy construction.
Construction project management teams, site supervisors, engineering firms, mining operations, disaster relief coordinators, and logistic centers. Any organisation that requires a secure, dry, and wind-resistant double-level workspace with quick occupancy. The 2-layer layout separates administrative areas from resting rooms or meeting zones.
| Parameter | Data |
| Outside Size (L*W*H) | 5810mm * 2330mm * 2540mm |
| Inside Size (L*W*H) | 5650mm * 2170mm * 2160mm |
| Packing Size (L*W*H) | 5810mm * 2350mm * 73mm |
| Main Frame Steel | 3.0mm cold galvanized steel plate (2.2mm/2.5mm/4.0mm optional) |
| Column Size | 210mm*150mm, thickness 3.0mm, includes 4 downspouts, connection parts 8.0mm |
| Door | Steel door 950mm*1970mm (customizable) |
| Window | PVC glass window 1150mm*1150mm, 5+9+5 double-layer glass |
| Wall Panel | 50/75/100mm glass wool sandwich panel |
| Floor Base | 18mm cement board + 2.0mm leather (floor tile / wood floor optional) |
| Color | White frame & wall (any RAL code on request) |
Two units stacked vertically form one Class 8 Windproof Prefab Container 2-Layer Office. Staircases, external corridors, and balconies can be added. Loading capacity: 20GP holds 6 units, 40HQ holds 12 units.
Every component is designed to meet international construction safety standards. The table below lists the certified performance levels:
| Property | Rating | Test Standard / Description |
| Wind Resistance | Class 8 (17.2–20.7 m/s) | Reinforced internal bracing, upgraded column joints |
| Earthquake Resistance | Richter scale 8 | Steel frame welded with flexible connection |
| Fire Protection | A1 class non-combustible | Glass wool core + galvanised steel skin |
| Thermal Insulation | Class III heat proof | U-value ≤ 0.45 W/m²·K (with 100mm panel) |
| Design Service Life | 30 years | Under normal climate, frame anti-corrosion coating |
For strong wind regions, the internal structure receives extra tie-down anchors. For cold climates, wall thickness increases to 100mm with high-density glass wool. For high-corrosion areas (coastal/industrial), anti-corrosive primer and topcoat are applied. This makes the Class 8 Windproof Prefab Container 2-Layer Office adaptable to diverse environments.
1. Complete production chain – Two factories covering 20,000m², six steel sheet press machines, six welding lines, two baking paint rooms, and one sandwich panel line. Full control from raw coil to finished module.
2. Precision engineering – 6 in-house engineers with over 10 years of experience. More than 20 patents held for connection joints, folding mechanisms, and windproof frames.
3. Faster assembly – Four workers take one hour to assemble one single unit. A complete two-layer office (6 units + staircase) is ready within two working days.
4. No hidden costs – Pre-cut, pre-drilled, and pre-welded components. No heavy equipment needed on site.
5. Environmentally sound – 100% recyclable steel frame. Low waste production because panels are cut to exact size.
Each delivery includes step-by-step installation drawings and video guides. For two-storey projects, an on-site supervisor can be arranged. The on-site service fee is negotiated per project scope. All projects receive 2-year warranty covering material and workmanship defects. Warranty period: any quality issue from production side is repaired or replaced free of charge.
Free design service: CAD floor plans and 3D visualisation provided before production. Modifications for internal layout (office, meeting room, storage, washroom) are supported. Power supply, water supply, drainage, distribution box, sockets, LED lamps, washbasin, toilet, and shower cabinet can be pre-installed.
More than 150 high-quality projects completed globally. The two-layer windproof design has been deployed in:
- 120 apple cabins in Canada (2024) – withstood coastal winter storms.
- 500 flat pack container houses to Russia (2024) – used as two-storey site offices in Siberia.
- 800 refuge houses for Iraqi government (2023) – emergency 2-layer shelters.
- 50 flat pack units in UK – permanent two-storey school annex.
Exports to Southeast Asia, Middle East, Africa, South America, Russia, and over 80 countries. All China mainland provinces also use this system.
Design quality: FEA analysis for wind load simulation. All possible failure points eliminated before drawing release.
Raw material quality: Certified galvanised steel (Q235B/Q355B), rock wool/glass wool with A1 fire report, weatherproof seals.
Production quality: Each welding seam is inspected. Every panel is checked for flatness. Baking paint thickness measured by coating thickness gauge.
Final inspection: Full mock-up assembly for random units. Water spray test for roof and window seals.
Delivery time: 7-10 days after deposit for standard orders. Large orders negotiated separately.
Hot & humid regions: Optional ventilated roof gap, reflective paint, and insect screens.
Cold & snowy regions: 100mm panel with double-layer glass wool + insulated floor + anti-snow load roof purlins.
High wind / cyclone zones: Additional steel tie-down kits, reinforced corner castings, and heavier base plates. The frame can be bolted to a concrete foundation.
Seismic zones: Flexible bolt connections between upper and lower containers, allowing slight movement without collapse.
All adaptations follow local building codes when required. The Class 8 Windproof Prefab Container 2-Layer Office has passed internal wind tunnel simulation for 8-class gust resistance (≈ 75 km/h).
Q1:How is the two-layer structure stabilised?
A1:Inter-container connectors (8.0mm thick steel plates) are bolted at four corners. Anti-lifting brackets prevent separation under uplift wind load.
Q2:What about stairs and landing?
A2:External galvanised steel staircase with handrail can be attached to either end or the middle. Width 900mm, anti-slip treads.
Q3:Can it be relocated after installation?
A3:Yes. All bolts are reversible. The structure can be disassembled into panels and frames, then moved to a new site. Typical relocation cycle 5+ times without performance loss.