1. General Requirements

• • Application Scope: Suitable for indoor/outdoor use, urban/remote areas, and temporary/permanent installations (service life: temporary ≥10 years; permanent ≥50 years).
  • Code Compliance: Meets or exceeds ISO 14001 (environmental management), ISO 9001 (quality management), IBC (International Building Code), and local building standards (e.g., EU EN 1090, US ASTM, Asian GB standards).
  • Design Loads:
• Live Load: 2.5-3.0 kN/m² (community spaces, clinics); 4.0 kN/m² (classrooms, multi-purpose halls).
• Wind Load: Up to 120 km/h (standard); customizable to 180 km/h (high-wind areas).
• Seismic Resistance: Grade 7-9 (per local seismic codes); adaptable for high-seismic zones (e.g., earthquake-prone regions in Asia, South America).
• Snow Load: 0.5-2.0 kN/m² (customizable based on regional snowfall).
  • Modular Dimensions:
• Standard Module: Width 3.0-4.8m, Length 6.0-12.0m, Height 2.8-3.2m (internal height).
• Custom Modules: Available in non-standard sizes based on project requirements (max length: 18m).

Weight: 8-15 tons per standard module (varies by materials and internal fittings).

2. Structural System

2.1 Frame Structure

• Material: Light-gauge steel (Q235/Q355) or hot-rolled steel (for heavy-duty modules); galvanized + powder-coated for corrosion resistance (coating thickness: ≥80μm).
• Frame Thickness: Columns: 3.0-5.0mm; Beams: 2.5-4.0mm; Joists: 2.0-3.0mm.
• Connection Method: Bolted connections (high-strength bolts, grade 8.8); pre-welded components for on-site efficiency; waterproof gaskets at module joints.
• Structural Performance: Lateral stiffness ≥1.5 kN/m; deflection ≤L/250 (L = span length).

2.2 Flooring System

• Structure: Steel joists + oriented strand board (OSB) base (thickness: 18mm) + cement fiberboard (thickness: 12mm) + finished floor.
• Finished Floor Options: Vinyl flooring (wear resistance: ≥AC4), ceramic tiles (slip resistance: R10), or hardwood (waterproof treatment) – suitable for high-traffic areas (e.g., clinics, classrooms).
• Sound Insulation: ≥45 dB (impact sound); ≥50 dB (airborne sound).

2.3 Wall System

• Exterior Wall: Steel sheet (thickness: 0.8-1.0mm) + thermal insulation (EPS/XPS/PIR, thickness: 50-100mm) + vapor barrier + interior gypsum board (thickness: 12mm).
• Interior Wall: Light steel keel + gypsum board (thickness: 12mm); sound insulation cotton (thickness: 50mm) for partition walls (sound insulation ≥40 dB).
• Waterproofing: Exterior wall: polyurethane waterproof coating (thickness: ≥1.5mm); roof: TPO membrane (thickness: 1.2mm) + insulation layer.

2.4 Roof System

• Structure: Steel truss + OSB base + insulation layer + waterproof membrane + finish layer (metal sheet or asphalt shingle).
• Slope: 3-5° (standard); customizable to 10° for heavy rain/snow areas.
• Load Capacity: ≥2.0 kN/m² (including snow and maintenance loads).

3. MEP (Mechanical, Electrical, Plumbing) Systems

3.1 Electrical System

• Voltage: 220V/380V, 50/60Hz (customizable for global regions).
• Wiring: Copper wires (cross-section: 2.5-10mm²); PVC conduit for protection; pre-installed in factory.
• Lighting: LED panel lights (18-36W, 800-1000 lumens/m²); emergency lighting (backup power: ≥90 minutes).
• Power Outlets: 1 outlet per 2-3m²; waterproof outlets for outdoor/kitchen areas (IP65).
• Grounding System: TN-S system; grounding resistance ≤4Ω.

3.2 Plumbing System

• Pipe Material: UPVC (drainage) + PPR (water supply); corrosion-resistant and easy to maintain.
• Water Supply: Pressure ≥0.3MPa; hot water system (electric/gas water heater, 50-100L capacity) for clinics/community centers.
• Drainage: Siphonic drainage system; anti-odor traps for all drains; sewage pipe diameter: 110-160mm.
• Waterproofing: Bathroom floors/walls: 2-layer waterproof coating (thickness: ≥1.5mm); water leakage test: ≥24 hours.

3.3 HVAC System

• Options: Split air conditioners (1.5-5HP) for small spaces; central air conditioning for large multi-purpose halls.
• Ventilation: Natural ventilation (windows + vents) + mechanical ventilation (exhaust fans, air exchange rate: ≥10 times/hour for clinics).
• Temperature Control: Cooling: 24-26℃; Heating: 18-22℃(customizable for cold/hot regions).

4. Fire Safety

• Fire Rating: Overall fire resistance ≥3 hours; wall/floor/roof fire resistance ≥2 hours.
• Fire Protection Equipment: Smoke detectors, fire extinguishers (1 per 50m²), emergency exit signs, and fire hoses (for large facilities).
• Materials: Fire-retardant insulation (flame retardant grade: B1); non-combustible steel frame; fire-retardant gypsum board.
• Emergency Exit: Minimum 2 emergency exits per module; exit width ≥1.2m; clear evacuation path.