Model/3D Formats Saved by ARCHICAD
IFC (.ifc), IFCXML (.ifcxml), IFCzip
IFC stands for Industry Foundation Classes.
To read more about IFC, see Working with IFC, or download the IFC manual from: http://www.graphisoft.com/support/ifc/downloads/
Rhino (.3dm) - Save
From the 3D window, use Save as Rhino 3D Model (.3dm) to ...