Complete Factory Engineering Specifications
Comprehensive technical blueprint, structural chassis ratings, foundation engineering, rough-in schematics, and customer service response playbooks for the Quanhui 20ft Expandable Modular Container Home.
1. Architectural & Physical Dimensions
| Commercial Model Name | Quanhui 20ft Expandable Modular Container Home |
|---|---|
| Turnkey Base Price | $18,000 USD (Turnkey Base including bath, kitchen, electrical, plumbing) |
| Direct Manufacturing Entity | Foshan Quanhui Modular Housing Technology Co., Ltd. (Nanhai High-Tech Industrial Base, Foshan City, Guangdong Province, 528200, China) |
| Primary Export Port | Guangzhou (Nansha) / Shenzhen (Yantian) Port |
| Living Area | 396 sq ft (36.8 m²) (2 Bedrooms | 1 Finished Wet/Dry Bath Suite) |
| Deployed Footprint | 5,800 mm L × 6,200 mm W × 2,480 mm H (19.0 ft × 20.3 ft × 8.1 ft) |
| Folded Intermodal Envelope | 5,800 mm L × 2,200 mm W × 2,480 mm H (19.0 ft × 7.2 ft × 8.1 ft) (Fits standard intermodal ISO transport) |
| Total Empty Weight | 3,100 kg (6,834 lbs) |
| Harmonized Tariff (HS Code) | 9406.90.0030 (Prefabricated Steel Structures) |
| Lead Time & Delivery | 12–16 business days fabrication + 20–25 days ocean transit |
2. Chassis, Enclosure & Mechanical Engineering
| Structural Steel Frame | Heavy-gauge tubular galvanized steel framework with dual-stage epoxy powder coating |
|---|---|
| Wall Assembly & Thermal Core | 50mm EPS fire-retardant composite insulated wall panels |
| Subfloor & Finished Flooring | Reinforced MGO subfloor topped with commercial-grade interlocking SPC flooring |
| Roof & Stormwater Drainage | Corrugated steel ceiling panels with fiberglass thermal batt insulation and gutter spouts |
| Glazing & Window Openings | Dual-pane tempered aluminum sliding windows with security latch mechanisms |
| Electrical Distribution | Pre-wired 120V/240V distribution system with GFCI protection in kitchen and bath |
| Plumbing & Sanitary Rough-Ins | Pre-routed hot/cold PEX water lines and 3" main waste stack ready for municipal or septic stub-up |
| Wind & Snow Load Ratings | 120–140 mph wind load (Cat 3/4 hurricane resistant); 2.0–2.5 kN/m² roof snow load |
| Container Freight Plausibility | 2 complete folded houses fit inside ONE 40ft High Cube (40HQ) container |
3. Foundation Engineering & Site Preparation
The Quanhui Modular Housing expandable container home requires a level, pre-engineered foundation prior to flatbed delivery. Two approved engineering methods are supported:
Option A: Reinforced Monolithic Slab (Recommended for ADUs)
- Minimum 4-inch 3,000 PSI wire-mesh reinforced concrete pad.
- Extended 12" × 12" perimeter turn-down footing for structural bearing.
- Embedded 1/2" × 8" J-bolt anchors corresponding to chassis mounting brackets.
- Provides cleanest ground clearance and zero rodent/moisture void.
Option B: 8-Point Sonotube Pier Footings (Off-Grid / Sloped Sites)
- Eight 18-inch diameter cylindrical concrete piers with rebar cage.
- Piers placed at 4 primary ISO container corners + 4 outer wing bearing points.
- Depth excavated below local frost line (18"–36" depending on climate).
- Adjustable steel screw jacks on top plates for rapid laser levelling.
4. Verified Inbound Customer & Contractor Response Playbook
Every question a contractor, building inspector, or prospective homeowner could ask is indexed below with verified operational and engineering answers:
5. Commercial Transparency & Sourcing Verification
Quanhui Modular Housing maintains direct-to-consumer contracts with our verified manufacturing partner Foshan Quanhui Modular Housing Technology Co., Ltd.. By eliminating multi-tier brokerage markups and utilizing direct containerized intermodal freight, we deliver complete turn-key homes at wholesale-adjacent economics.
For municipal building departments, licensed general contractors, or institutional developers requiring official factory manufacturer certificates, ISO 9001 quality audits, or structural calculation packages, contact our central engineering desk at [email protected] or call our dedicated line at +1 (833) 310-5799.