ARCAT Revit Files / BIM objects - Architectural Building Information Modeling (BIM) objects / families / system files, free to download in revit or dwg formats for use with all major BIM and CAD software including AutoCAD, Sketch-Up, ArchiCAD and others. Formats: RFA / RVT - Revit Families / Systems, SKP - SketchUp, DWG / IFC - all other software. By downloading and using any ARCAT content you agree to the following [license agreement].