Quanhui Modular Housing
Engineering Specifications

Quanhui 20ft Expandable Modular Container Home

Every unit is pre-assembled, wired, and plumbed at our manufacturing plant (Chongqing Quanhui Modular Housing Co., Ltd.) before international shipping.

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Complete Dimensional & Structural Schedule

Living Area396 sq ft (36.8 m²)
Bedrooms2 Bedrooms
Bathrooms1 Full Bathroom with Glass Shower
Dimensions (Deployed)5,900 mm L × 6,240 mm W × 2,480 mm H (19.4 ft × 20.5 ft × 8.1 ft)
Dimensions (Folded)5,900 mm L × 2,220 mm W × 2,480 mm H (Road-Transport Legal Width)
Structural ChassisCE-Certified structural steel frame with anti-rust cathodic primer finish
Wall & Roof CoreMulti-layer insulated wall assembly with waterproof breathable membrane
Windows & Glazing16 dual-pane insulated windows with integrated insect screens
DoorsAluminum double-glazed patio entry door and internal solid-core wood doors
Subfloor & FinishReinforced MGO/cement floor substrate topped with waterproof SPC interlocking plank
Electrical InfrastructureUL American Standard Certified Electrical Outlets, Switches, and Breaker Panel
Plumbing InfrastructureComplete pre-fitted sanitary plumbing ready for municipal or septic connection
Manufacturer Warranty3-Year Manufacturer Warranty on Steel Framing & Thermal Enclosure
Turnkey Base Price$18,000 (Complete turnkey base package)
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Free Contractor CAD Blueprint Package

Planning to permit or prepare a foundation? Download the complete 24-page stamped architectural CAD drawing set, pier loading schedules, and foundation layouts.

Quanhui Finished L-Shaped Kitchen and Interior Living Area
Exterior elevation of the Quanhui 20ft Modular Home

Standard Equipment Inclusions

  • Pre-assembled expandable folding steel wing structure
  • Double-glazed windows with protective screens
  • Finished kitchen cabinet assembly with countertop and sink
  • Complete partitioned bathroom with shower, toilet and sink
  • Pre-wired interior lighting and power outlets
  • Integrated main distribution breaker box
See Available Custom Upgrades →

Detailed Gallery & Layout Drawings

Finished L-Shaped Kitchen with Marble-look Countertops
Factory-installed L-shaped kitchen cabinets, stone-look countertops, and stainless sink
Quanhui Architectural Floor Plan and Room Layout
Comprehensive 2-bedroom floor plan showing central living, bath, and kitchen zones
Architectural Drafting Set

Full CAD Blueprint & Layout Drawing Package

Complete working drawings ready for building department permitting and contractor review. Click any drawing to view in high-resolution.

Architectural 2-Bedroom CAD Floor Plan Drawing
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Architecture Specification

Architectural 2-Bedroom CAD Floor Plan Drawing

Complete architectural layout blueprint with millimeter and imperial dimension lines. Features 5,900 mm length × 6,480 mm deployed width, dual bedrooms (4.0m × 3.0m), wet/dry bathroom pod (3.1 m²), finished kitchenette (4.8 m²), and open living room (7.2 m²). Scale 1:50 with standard architectural title block.

4-Step Rapid Unfolding & Deployment Sequence
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Engineering Specification

4-Step Rapid Unfolding & Deployment Sequence

Sequential isometric technical diagram detailing the complete 90-minute site unfolding process: Step 1 (Crane lowering onto foundation) -> Step 2 (Dual side wings swinging out on heavy hinges) -> Step 3 (Roof canopy lowering and floor panels dropping) -> Step 4 (Fully locked and weather-sealed turnkey home).

Foundation Engineering: 8-Point Pier Plan & 4" Monolithic Slab Detail
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Civil / Structural Specification

Foundation Engineering: 8-Point Pier Plan & 4" Monolithic Slab Detail

Dual-option civil engineering drawing (Dwg No. F101): Option 1 shows the 8-Point Concrete Sonotube Pier Plan with frost-line depth, footing rebar, and galvanized anchor bolt locations; Option 2 shows the 4-inch Monolithic Reinforced Concrete Slab Detail with #4 rebar grid, vapor barrier, and utility penetrations (3" PVC sewer & 1/2" PEX water).

Structural Steel Chassis & Heavy-Duty Expansion Hinge Assembly
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Structural Specification

Structural Steel Chassis & Heavy-Duty Expansion Hinge Assembly

Exploded isometric drafting detail (Dwg No. ECH-S-001) showing 3.0mm Q235B cold-formed structural steel chassis, standard ISO corner casting blocks, tube roof purlins, heavy-duty stainless steel hinge pivot pins (25mm pin with bronze bushings), and double-lip weatherproof EPDM silicone compression gaskets.

120/240V US Split-Phase Electrical Single-Line Schematic & Circuit Schedule
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Electrical Specification

120/240V US Split-Phase Electrical Single-Line Schematic & Circuit Schedule

NEC-compliant electrical distribution drawing showing 120/240V 100A main service panel (Panel A), circuit breaker schedule, 12/2 NM-B copper wiring paths, dedicated 20A GFCI circuits for kitchen and bath, 20A mini-split heat pump circuit, and 15A AFCI lighting loops with grounding electrode details.

Plumbing DWV Drainage & 1/2" PEX Hot/Cold Supply Piping Isometric
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Mechanical / Plumbing Specification

Plumbing DWV Drainage & 1/2" PEX Hot/Cold Supply Piping Isometric

Uniform Plumbing Code (UPC) compliant isometric piping schematic showing on-demand tankless water heater, 1/2" PEX hot (red) and cold (blue) distribution, 3" Schedule 40 PVC DWV sanitary drainage with accessible cleanout tee, shower P-trap, toilet flange, and roof vent stack penetration (VTR-1).

View Full Photo & Blueprint Gallery (13+ Assets) →