Export One Area to IFC File
The
If you export to an IFC file that does not exist, it will be created with the 3D-BIM elements from the current drawing.
If you export to an IFC file that exists, but does not contain any 3D-BIM elements from the selected alignment point area, the 3D-BIM elements from the selected alignment point area will be appended to the end of the IFC file.
If you export to an IFC file that exists, and contains 3D-BIM elements from the selected alignment point area, the existing 3D-BIM elements in the IFC file will be removed and replaced with the current 3D-BIM elements in the selected alignment point area.
To export a single alignment point area to an IFC file, go to
Ribbon: 
Export One Area to IFC File
Pulldown Menu:
You will be prompted to identify the alignment point area to be exported.
Select point inside area to export:
The Save IFC File As dialog box will appear.
Save IFC File As Dialog Box​
Enter a name and location for the IFC file, then press the button. The selected alignment point area will be saved to the IFC file.
3D circle approximation: Sets the number of sides on polygons used to approximate circles in the 3D model.