Description

Key Features

Expands up to 3× the footprint. 20ft units open to roughly 37–40 m²; 40ft units open to roughly 60 m² and beyond.
Deploy in minutes. Two people can unfold and level the unit with the adjustable support legs — no crane, no builders, no foundations.
Ships in one container. Folds back down to a standard shipping-container size, dramatically cutting ocean freight and inland transport cost.
Flat exterior wall panels. Clean, modern facade in wood-grain, white, grey, or custom colors — powder-coated steel frame for long corrosion resistance.
Insulated for year-round comfort. EPS / rockwool / PU sandwich panels keep the interior warm in winter and cool in summer; suitable for tropical, desert, and cold-climate projects.
Pre-wired and pre-plumbed. Electrical outlets, LED lighting, breaker box, bathroom fixtures, and kitchen points come factory-installed — just connect to water, power, and sewer.
Strong and safe. Bolted steel frame engineered for wind loads, seismic zones, and heavy snow; successfully deployed in earthquake-relief, mining, and remote-oilfield projects.
Fully customizable. Window/door positions, interior layout, ceiling height, furniture package, solar roof, and porch/deck — built to your floor plan.

Common build specification

Main frame	Fully galvanized — top & bottom main beams 80 × 140 × 3.0 mm (30 / 40 ft), or 80 × 80 × 2.5 mm and 60 × 80 × 2.5 mm (20 ft); top & bottom cross members 2.0 mm pressed section; corner post 2.0 mm with a 6 mm lifting-lug insert
Wing frame	40 × 80 × 1.5 mm P-profile top frame · 60 × 80 × 1.5 mm & 80 × 80 × 1.5 mm bottom frame · 70 × 80 × 1.2 mm channel side studs (30 / 40 ft)
Folding hinge	13 mm galvanized hinge, with a rubber gasket forming the weather joint
Surface treatment	Whole frame electrostatically powder-coated
Roof	0.35 mm corrugated colour-steel sheet over a 50 mm EPS top panel
Wall panel	External 75 mm EPS sandwich panel (wood-grain / 3D finish optional) · internal partition 50 mm EPS
Floor	18 mm fireproof magnesite board across core and wings + 2.0 mm PVC floor finish
Entrance door	Thermal-break aluminium / aluminium-magnesium alloy, 1900 × 2230 mm (20 ft) or 1900 × 2190 mm (30 / 40 ft)
Bedroom door	Steel or wood-core door, 750 × 2050 mm
Windows	Thermal-break aluminium / aluminium / uPVC, 930 × 930 mm; bathroom window 500 × 500 mm
Bathroom	Dry/wet-separated — partition, shower, wash basin, WC, mirror, cabinet, door, floor drain, supply and drain pipework
Kitchen	L-shaped cabinet with stainless-steel worktop (hob not included)
Electrical	63 A earth-leakage breaker + 4 air switches · LED ceiling lights · sockets · two-way switches
Design life	20 years

Five steps, four workers, about ten minutes

The unit is a closed box when it arrives. A crane or forklift sets it on the pads; everything after that is done by hand, with no welding and no wet trades.

Standard floor plans, drawn to your site

Each unit arrives with its partitions, doors and wet areas already positioned. Layouts can be re-cut on the same frame — send us a plan or a sketch and we return a drawing.

Three sizes, one platform

The 20 ft, 30 ft and 40 ft units share the same frame system, wall build-up and interior package. Only the length — and the resulting layout — changes.

Attribute	20 ft double-wing	30 ft double-wing	40 ft double-wing
Layout	2 bed + living + kitchen + bath	3 bed + living + kitchen + bath	2 bed + living + kitchen + bath
Occupancy	2–4 persons	4–6 persons	4–6 persons
Expanded size L×W×H	5900 × 6480 × 2480 mm	9000 × 6220 × 2480 mm	11800 × 6220 × 2480 mm
Folded size L×W×H	5900 × 2200 × 2480 mm	9000 × 2200 × 2480 mm	11800 × 2200 × 2480 mm
Internal size L×W×H	5460 × 6320 × 2235 mm	8420 × 6060 × 2200 mm	11220 × 6060 × 2200 mm
Footprint	38.2 m²	56 m²	73.4 m²
Shipping weight	≈ 3.4 t	≈ 4.5 t	≈ 5.5 t
Electrical load	12 kW	12 kW	12 kW
Loading per 40HQ	2 sets	1 set	1 set
Supply	220–250 V / 50 Hz	220–250 V / 50 Hz	220–250 V / 50 Hz

Applications

Emergency disaster-relief housing and refugee camps
Construction-site worker camps and mining / oilfield accommodation
Backyard office, home studio, guest house, and granny flat
Remote clinics, field hospitals, and classroom units
Tiny homes, glamping pods, and boutique resort cabins
Site offices, sales pavilions, and security guard houses

Why Choose 9STATES

9STATES is a Shanghai-based modular building manufacturer with direct factory control over steel framing, panel fabrication, and pre-finishing. We supply expandable container houses to clients in South America, the Middle East, Southeast Asia, Africa, and Eastern Europe, with local warehouse and partner support in key markets. Every unit is factory-tested before loading, and we support OEM/ODM, project-based pricing, and container-load consolidation for distributors and contractors.

Customization

Send us your floor plan, climate, and intended use — we'll engineer the unit to suit. Typical options: double/triple expansion, extra windows, solar panel package, full interior fit-out, bathroom/kitchen appliances, wheelchair access, and certified export packaging for sea freight.