The File > Export > Structure command exports the structural physical model to a CIS/2 or IFC file. For more information, see Importing and Exporting Structure.
Exporting User-defined Properties
You can map user-defined Smart 3D properties to third-party software attributes and export those properties/attributes to the CIS/2 file using the UserAttribute_Map.xml file. A sample UserAttribute_Map.xml file is delivered with Smart 3D in the [Product Folder]\SmartPlantStructure\Symbols\StructureImportExportMaps folder.