JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. Place RFA as Cell Used to import Autodesk Revit® RFA files and PC Studio models (parametric cell) for placement. The supported file types are *.rfa, *.paz and *.pac files. You can access this tool from the following: Backstage - File > Import > Exchange File Types > RFA (*.rfa) Key-in: TFPACELL IMPORT Parent topic: RFA Content in OpenBuildings Designer