Description

Technical Overview & Core Specifications

Unlike traditional site-built structures or rigid single-trip shipping containers, our Modular Expandable Container House utilizes a cold-formed Q235B galvanized steel skeleton combined with mechanically secured hinge assemblies. This configuration allows the sidewalls to unfold into a rigid, load-bearing living or working space while maintaining thermal envelope continuity.

Standard Dimensional & Weight Data

Specification	20ft Standard Model	40ft Extended Model
Folded Dimensions (L x W x H)	5900 mm x 2250 mm x 2530 mm	11800 mm x 2250 mm x 2530 mm
Expanded Dimensions (L x W x H)	5900 mm x 6300 mm x 2530 mm	11800 mm x 6300 mm x 2530 mm
Total Usable Floor Area	~37 Square Meters	~74 Square Meters
Net Dry Weight	3,200 kg (approx.)	5,800 kg (approx.)
Transport Efficiency	2 units per 40' HQ Shipping Container	1 unit per 40' HQ Shipping Container (with accessories)

Materials, Metallurgy & Structural Engineering

Structural longevity depends directly on steel grade, coating weight, and thermal break design.
Primary Chassis & Columns:
Fabricated from structural carbon steel Q235B, thickness ranging from 3.0 mm to 5.0 mm.
Surface treatment: Hot-dip galvanized (zinc coating >= 275 g/m2), followed by electrostatic polyester powder coating (DFT >= 80 um) for salt-spray corrosion resistance.
Wall & Roof Enclosures:
50mm / 75mm / 100mm thickness Rockwool or Polyurethane (PU) sandwich panels.
Outer skin: 0.45 mm stucco-embossed Al-Zn coated steel sheet.
Fire rating: Class A1 non-combustible (Rockwool option) or B1 flame-retardant (PU option).
Flooring System:
18mm thick cement-fiber board substrate layered with 2.0 mm heavy-duty commercial vinyl flooring (wear-resistant grade).
Floor live load capacity: 2.5 kN/m2.

Engineering Performance Data

Wind Load Resistance: Up to Grade 11 (117 km/h) when anchored to concrete strip footings.
Seismic Rating: Designed to withstand Richter Scale Magnitude 8 earthquakes through flexible joint displacement.
Snow Load Capacity: 0.5 kN/m2 standard roof pitch design (customizable up to 1.2 kN/m2 for alpine regions).
Design Lifespan: 15 to 20 years under normal atmospheric conditions with scheduled seal inspection.

Manufacturing Process & Quality Control

Every modular unit undergoes a rigorous factory fabrication sequence before flat-packing:
CNC Profile Cutting & Robotic Welding: Steel tubes are laser-cut and welded via automated MIG welding stations to ensure dimensional tolerance within +/- 1.0 mm.
Hinge Sealing Integration: Double-layer EPDM rubber gaskets are factory-installed along all folding vertical interfaces to eliminate thermal bridging and moisture ingress.
Pre-wired Electrical Harness: Integrated trunking containing copper wiring (conforming to IEC or UL standards) is pre-run inside wall cavities, terminating at pre-mounted distribution boards, circuit breakers, and industrial-grade sockets.
Pre-plumbed Sanitary Lines: PPR water supply piping and PVC drainage lines are pressure-tested at 0.8 MPa for 30 minutes prior to packaging.
Pre-delivery Factory Trial Assembly: 5% of each production batch undergoes complete random mechanical unfolding and structural load testing on the factory floor.

Typical Application Scenarios

Remote EPC & Mining Camps: Rapidly deployed site offices, engineer dormitories, and dining mess halls that require relocation across project phases.
Commercial & Retail Outlets: Pop-up showrooms, ticketing booths, and highway service station hubs.
Municipal & Disaster Relief: Emergency medical triage stations, temporary classrooms, and civil defense housing.

Supplier Verification & Manufacturing Facilities

Factory Scale: 45,000-square-meter fabrication facility equipped with 3 automated roll-forming lines, 2 robotic welding cells, and an independent coating workshop.
Quality Certifications: ISO 9001:2015 Quality Management System, ISO 14001 Environmental Management.
Compliance Standards: Structural calculations certified by independent third-party engineering firms; electrical components carrying CE / UL listings upon project requirement.

Procurement, Shipping & Installation Guide

MOQ (Minimum Order Quantity): 2 units (to optimize 40' HQ container consolidation).
Lead Time: Standard configurations ship within 15 to 20 working days upon receipt of deposit. Custom layout variations require 25 to 30 working days.
Packaging Method: Flat-packed into modular bundles. Main chassis frames are steel-strapped; panels and hardware are shrink-wrapped in waterproof membranes.
On-Site Installation Requirement:
Tools needed: 25-ton mobile crane, torque wrenches, basic hand tools.
Labor: 3-person crew can complete expansion, leveling, and utility hookup of a single unit in approximately 3 to 4 hours.

Frequently Asked Questions

Q: How do you prevent water leakage at the folding hinges and roof joints?

A: We use a three-tier sealing system: mechanical compression clamps, dual-channel EPDM rubber gaskets running continuously along the vertical fold lines, and an exterior aluminum flashing rain-cap installed on-site over the roof ridge. This prevents capillary moisture penetration during wind-driven rain.

Q: Can these units be stacked vertically?

A: Standard expandable container houses are designed for single-story deployment. If a double-story configuration is required, specific corner-post reinforcement and structural tie-downs must be engineered into the frame. Consult our engineering team with your specific load requirements.

Q: Are the electrical and plumbing systems compatible with North American / European standards?

A: Yes. We customize electrical panels, circuit breakers, wire gauges (e.g., AWG for North America or metric for Europe/Australia), and plumbing fitting threads (NPT vs. BSP) to match the destination country's regulatory codes.

Q: What foundation is required before installation?

A: These units do not require a full concrete slab. Simple concrete piers, strip footings, or adjustable steel support jacks placed at the four structural corner points and intermediate load points are sufficient, provided the ground is level and compacted.

Request Technical Data Sheet & Quotation

To evaluate these modular units for your project, please provide the following details to our engineering sales team:

Destination port or site location (for freight calculation).
Required quantity and internal layout preferences (e.g., open office, 2-bedroom partition).
Specific electrical voltage/frequency standards and local code requirements.
[Request Engineering Quotation & CAD Drawings]

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