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Optional Wiring Lighting Sockets Distribution Box Network Preparation
Plumbing System
Optional Water Supply Drainage Bathroom Kitchen Readiness
Brand Name
SUNHOUSE
Certification
CE
Place of Origin
Guangdong
Galvanized Steel Flat Pack Container House | 20FT and 40FT Prefab Modular Building Units
Volume-ready flat pack container house built on a hot-dip galvanized Q345B steel frame with 75mm insulated sandwich panel walls and roof, available in 20FT and 40FT configurations for scalable multi-site procurement and rapid on-site assembly.
Product Overview
The flat pack container house is a factory-produced modular building system shipped in a disassembled panel-and-frame format that stacks compactly inside standard shipping containers, significantly increasing the number of units per container load compared to fully assembled box units. The structural system is based on a hot-dip galvanized Q345B steel corner post and beam frame with bolt-connected joints, allowing a four-person crew to erect a complete 20FT unit in under three hours using hand tools and a small crane without specialist technical skills.
Wall and roof panels consist of 75mm EPS or rock wool insulated sandwich panels with 0.426mm color-coated steel facings on both sides, delivering reliable thermal separation and weather resistance across tropical, arid, and cold-climate deployment zones. The 40FT variant provides a full 29.6 m² net floor area suitable for larger office configurations, multi-bed dormitory layouts, or combined utility and living spaces. Both sizes share the same panel and connector system, allowing mixed procurement orders to share spare parts and on-site assembly tooling across a project portfolio.
Key Features
Flat pack format increases shipping density — up to 6 units per 40HQ container versus 1 unit for box-type
Hot-dip galvanized Q345B steel frame with bolt-node connections — no welding required on site
20FT and 40FT standard sizes share identical panel dimensions and connector hardware
75mm EPS or rock wool sandwich panels achieve U-value ≤ 0.45 W/m²K for climate-controlled interiors
0.426mm color-coated steel panel skins provide UV resistance and surface durability in outdoor exposure
Aluminum alloy double-glazed sliding windows with powder-coat finish and security locks
50mm insulated steel security door with multi-point latch, pre-hung in factory-assembled frame
Pre-routed 220V electrical conduit with distribution board, breakers, LED strip fixtures, and socket outlets
Modular bathroom and kitchen pod options connect to external water supply and drainage without structural modification
Units can be joined laterally or stacked two high using standard twist lock connectors
CE certified structural system with 15-year anti-corrosion warranty on galvanized frame
Technical Specifications
Parameter Item
20FT Specification
40FT Specification
Exterior Dimensions
6,055 × 2,435 × 2,800 mm
12,192 × 2,435 × 2,800 mm
Net Interior Floor Area
Approx. 13.5 m²
Approx. 29.6 m²
Interior Ceiling Height
2,500 mm
2,500 mm
Units per 40HQ Container
Up to 6 units
Up to 3 units
Main Frame Material
Q345B hot-dip galvanized steel, 3.5 mm wall thickness, bolt-node joints
Wall Panel
75 mm EPS or rock wool sandwich panel, 0.426 mm color steel both sides
Roof Panel
75 mm EPS sandwich panel with 1.0 mm TPO waterproof membrane overlay
Floor System
18 mm moisture-proof plywood + 2 mm anti-slip PVC, 250 kg/m² load rating
Wall Thermal U-Value
≤ 0.45 W/m²K (rock wool option ≤ 0.38 W/m²K)
Windows
Aluminum alloy sliding, 5+9A+5 mm double glazed, powder-coat finish
Entry Door
50 mm insulated steel, multi-point latch, factory pre-hung frame
Electrical System
220V / 50Hz, pre-routed PVC conduit, 1× distribution board, 6× sockets, 4× LED fixtures
Wind Load Rating
Level 10 (≤ 28.4 m/s sustained)
Snow Load Capacity
0.5 kN/m²
On-Site Assembly Time
2–3 hours (4-person crew)
3–4 hours (4-person crew)
Stacking Capacity
2 stories with twist lock connectors
Frame Corrosion Warranty
15 years (hot-dip galvanized coating)
Design Service Life
≥ 20 years under standard use conditions
Certification
CE structural certification; SGS inspection available on request
Optional Upgrades
Rock wool panel upgrade, bathroom pod, kitchen module, AC bracket, solar mounting rail, furniture package
Applications
Construction site management offices and on-site meeting room blocks
Worker dormitory camps for large-scale civil, energy, and infrastructure projects
Mining and quarry site accommodation with repeatable multi-unit procurement
Oil and gas field temporary living quarters requiring fast commissioning
Industrial park guard booths, reception counters, and security checkpoints
School and training center classroom expansion in remote or under-served areas
Warehouse annexes and on-site tool storage facilities for logistics operations
Disaster response and humanitarian relief shelter programs requiring volume delivery
Frequently Asked Questions
How many flat pack units fit inside a standard 40HQ shipping container?
Up to six 20FT units or up to three 40FT units can be loaded into a single 40HQ container. This shipping density is the primary cost advantage of the flat pack format over pre-assembled box-type container houses, which ship one unit per container load.
What tools and equipment are needed for on-site assembly?
A four-person crew, standard hand tools, an electric impact wrench, and a small 3-ton crane or telehandler are sufficient to erect a complete 20FT unit in two to three hours. No welding equipment, specialist trades, or heavy machinery are required.
What is the difference between EPS and rock wool panel options?
EPS panels offer a lower unit cost and are suitable for moderate climates and short-to-medium deployment durations. Rock wool panels provide superior thermal insulation (U-value ≤ 0.38 W/m²K), Class A1 fire resistance, and better acoustic performance, making them the preferred choice for permanent-style camps, cold climates, and projects with fire safety compliance requirements.
Can the 20FT and 40FT units be connected side by side on site?
Yes. Units share compatible end-wall panel dimensions and can be joined laterally with a shared corridor opening or directly connected through a cut end panel. Mixed 20FT and 40FT layouts can form L-shaped, U-shaped, or linear building blocks depending on site configuration requirements.
What information is needed to receive a volume quotation?
Please provide destination port, total unit quantity, size mix (20FT / 40FT ratio), panel type preference (EPS or rock wool), intended use (office, dormitory, warehouse, or mixed), electrical standard (voltage, frequency, plug type), and optional upgrade requirements. FOB pricing with per-unit and total cost breakdown will be returned within 24 hours.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Trading Company
Year Established:
2005
Employee Number:
500~1000
Ecer Certification：
Verified Supplier
Foshan Huiju Decoration Material Co. Ltd. is situated in Gaoming District, Foshan City, Guangdong Province, with its roots deeply embedded in the Guangdong-Hong Kong-Macao Greater Bay Area. As one of the top 10 manufacturers of prefabricated and integrated houses in Guangdong Province, we are a mult... Foshan Huiju Decoration Material Co. Ltd. is situated in Gaoming District, Foshan City, Guangdong Province, with its roots deeply embedded in the Guangdong-Hong Kong-Macao Greater Bay Area. As one of the top 10 manufacturers of prefabricated and integrated houses in Guangdong Province, we are a mult...
