Guide
Export from Revit Tutorial
Step 1
From the file menu, go to export > options > exports setups dwg/dxf.
Click on the solids tab, and select ACIS solids.
Hit OK, and return to the export menu > CAD formats > DWG.
Step 2
Make sure you are in the 3D orthographic view when you export the model in DWG 2014
Step 3
Save as Autocad 2010 DWG File