Prefab house, prefabricated house, and Modular house 1) Prefabrication, easy to install and disassemble 2) Precision works, long life-span for use: 15years at least 3) Lightness, easy to transport and relocate 4) Using several times and recycling, economy and environment protecting 5) High strength and stiffness, high weight bearing 6) Waterproofing 7) Antisepsis and damp proofing 8) Sound insulation and heat insulation 9) Fireproofing level: A1 10) Earthquake proofing: 7 11) Wind load: 120km/h