| 1 |
Regulatory and Certification Compliance |
18% |
Product drawings, material certificates, factory quality records, and applicable ISO, GB, CE, or project-specific compliance documents. |
Documents must match the exact model, materials, destination market, and intended use rather than being generic company certificates. |
Non-compliant structures can cause customs, permitting, insurance, and installation problems. |
| 2 |
Structural Design and Load Calculations |
15% |
Stamped structural calculations, steel grade certificates, connection details, lifting points, floor-load data, and roof-load data. |
Calculations should be prepared for the actual span, module size, occupancy, snow load, wind load, and local design code. |
Foldable buildings depend heavily on hinges, corner posts, welds, and transport connections. |
| 3 |
Fire Safety and Material Performance |
12% |
Fire-rating reports for wall, roof, floor, insulation, doors, and electrical components; product technical data sheets. |
Fire classifications and test methods must correspond to the destination country's building and fire regulations. |
Insulation cores, interior finishes, wiring, and escape routes directly affect occupant safety. |
| 4 |
Wind, Seismic, and Climate Adaptability |
10% |
Project-specific wind and seismic calculations, anchoring details, corrosion protection, and climate-zone specifications. |
The supplier should state design assumptions instead of quoting one universal wind or earthquake rating. |
A design suitable for one region may be unsafe or unsuitable in a coastal, high-wind, snowy, or seismic location. |
| 5 |
Thermal, Acoustic, and Energy Performance |
10% |
Insulation type and thickness, U-value or thermal-resistance data, window specifications, ventilation design, and acoustic test information. |
Performance claims should identify the test method, assembly configuration, climate zone, and installation conditions. |
Poor envelope performance increases condensation, energy use, discomfort, and maintenance costs. |
| 6 |
Waterproofing and Drainage Design |
8% |
Roof-joint details, gasket specifications, sealant information, drainage drawings, and water-spray or leak-test records. |
The complete folded assembly should be tested, including roof seams, wall joints, doors, windows, and penetrations. |
Water ingress is one of the most common causes of corrosion, mold, insulation failure, and interior damage. |
| 7 |
Folding Mechanism and Durability |
8% |
Hinge design, locking-system drawings, maintenance instructions, cycle-test records, replacement-part availability, and inspection procedures. |
Request a documented cycle-test method and confirm that seals, hinges, locks, and utility connections remain functional after repeated folding. |
The folding system determines transport efficiency, installation speed, service life, and repair costs. |
| 8 |
Factory Quality-Control System |
7% |
Incoming-material inspection, weld inspection, dimensional checks, coating-thickness records, electrical testing, and final inspection reports. |
Use a pre-shipment inspection checklist with measurable acceptance criteria and photographic evidence. |
A documented process is more reliable than marketing claims or a single factory visit. |
| 9 |
Production Capacity and Delivery Control |
6% |
Confirmed production schedule, realistic monthly capacity, critical-path plan, packaging method, shipping dimensions, and loading plan. |
Capacity should be supported by current production evidence and should distinguish standard models from customized projects. |
Late delivery or incorrect packing can eliminate the logistics advantage of a foldable design. |
| 10 |
Warranty, Spare Parts, and Technical Support |
6% |
Written warranty terms, exclusions, response times, spare-parts list, installation manuals, remote support, and after-sales procedures. |
The contract should define warranty duration, defect responsibility, replacement procedures, and technical-support scope. |
Long-term operating costs depend on whether components can be identified, replaced, and supported after delivery. |
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