prefab house plans sound insulation Heat insulation preservation ISO9001:14000 Name:modern beautiful double-storey prefab house plans1. Introdcution:The ... projects . 2.Main material for the prefab house:Main MaterialSteelStructureandWallBody 1.Wall structure frame“U” shape ... building, hospital, school, hotel, mall, amusement, old house reconstruction, residence and workshop.Supplied to: Iran, Russia, ...