English
Français
Deutsch
Italiano
Русский
Español
Português
Nederlandse
Ελληνικά
한국
العربية
हिन्दी
Türkçe
Indonesia
Tiếng Việt
ไทย
বাংলা
فارسی
Polski
Flat pack and detachable container houses leave the factory the same way: knocked down, as panels and frame members, stacked into a 40HQ. The buyer who shortlists both is not choosing between two shipping methods. The difference sits at the corner and on the roof — in how the frame is connected, and in how water leaves the building.
Two Corner Systems, Two Roofs
| Item | Flat pack | Detachable |
|---|---|---|
| External size | 6,000 × 3,000 × 2,840 mm (18 m²) | 5,950 × 3,000 × 2,800 mm (17.85 m²) |
| Clear internal height | 2,500 mm | Envelope 2,800 mm — ask for the clear figure |
| Corner connection | Corner head 210 × 150 × 160 mm bottom, 210 × 150 × 200 top; no exposed bolt at the joint | Corner castings; bottom beams fixed with high-strength structural bolts, roof frame bolted onto top cast blocks |
| Columns / beams | Columns 210 × 150 × 60 mm; beams 160 × 60 mm; frame 2.2–3.0 mm | Four corner columns on the casting grid; frame 2.3–3.0 mm tube |
| Roof drainage | Channel inside the top beam, discharged through a drop pipe | Deep U-shaped channel in the roof frame + multi-layer sealant, edge discharge |
| Wall panel | 1150 profile, 50–200 mm rock wool / glass wool / EPS / PU / phenolic | 50 / 75 / 100 mm rock wool / EPS / PU |
| Window | Huijue insulated casement 1,120 × 1,100 mm | Plastic-steel sliding window × 2 |
| Door | 840 × 2,035 mm, 0.4 mm skin | 0.4 mm steel door |
| Floor | Grade A magnesium or cement-sand board, 15/18 mm | 15 / 18 mm MGO or cement board + PVC |
| Sets per 40HQ | 16–17 (288–306 m²) | 18 (≈321 m²) |
Corner Head Against Corner Casting
On the flat pack unit the four corners are corner heads — 210 × 150 × 160 mm at the bottom, 210 × 150 × 200 mm at the top — and no bolt is exposed at the corner joint. The 210 × 150 × 60 mm column bolts into the head and carries the 160 × 60 mm top beam; the wall panel sets into the frame. That is why the corner stays sealed after repeated dismantling.
The detachable unit works off corner castings. Bottom main beams bolt into the castings with high-strength structural bolts, four corner columns go up, and the roof framework bolts onto the top cast blocks; sandwich panels slide into the frame tracks. It is a five-step site sequence — ground, chassis, columns and roof, panels, interior — all bolted, so the unit comes apart again without cutting steel.
In short: the flat pack corner is a fabricated head; the detachable corner is a casting that anchors the chassis. Ask for the corner drawing, not the size.
Two Drainage Methods
Flat pack drains through the structure: the top beam carries a channel, water leaves through a drop pipe, and the roof sheet sits higher than the beam. Detachable drains at the edge: a deep U-shaped channel runs in the roof frame under multi-layer weather sealant, and water discharges along the roof edge — no drop pipe in the wall.
Neither is a defect. Where snow-melt or wind-driven rain tracks down a wall face, a piped discharge keeps water off the facade; where the pipe could freeze or block, edge discharge has nothing to maintain. What you must not accept is a quotation that describes one and delivers the other.
The Manifest Still Decides
16–17 flat pack sets against 18 detachable sets per 40HQ — 288–306 m² against about 321 m², on units of 18 m² and 17.85 m². Flat pack gives 2,500 mm clear height inside its 2,840 mm envelope; the detachable envelope is 2,800 mm, so ask for the clear figure in writing.
How to Choose
- Flat pack — headroom, wall build-up to 200 mm and a piped roof: offices, clinics, wet areas, camps that stand for years.
- Detachable — the most floor area per container and the simplest chassis for volume housing.
- Either way — request the corner drawing, clear internal height in millimetres and the drainage detail in writing.
FAQ
- How many container houses fit in a 40HQ? Flat pack 16–17, detachable 18.
- Do both ship knocked down? Yes — both as panels and frame members. The difference is the corner system and roof drainage, not packing.
- Which one has a drainage pipe? Flat pack, through a channel in the top beam and a drop pipe. Detachable discharges at the roof edge.
- Can both be re-erected? Yes. Both are bolted, not welded.
- Where is the detachable container house specification listed? In the table above, per model.
Send your module count, site conditions and destination port, and we will return both configurations side by side — container house 40HQ loading plans, corner details and drainage method written out.
