CAD Linking - Best Practices

Revit 2008
• If the CAD DWG has too many hatches, they will create issues in Revit. (fatal Error)
• If the objects are too far from origin, they will create issues in Revit. (fatal Error)
• If the objects are located too high from Z=0, they will create issues in Revit.
• If there are too many objects in the DWG, Revit does not like it.
• Lines that are with slightly off the axis in CAD are not good for Revit.
• ADT or any other vertical AutoCAD objects wont be imported. You have to set the variable (Proxygraphics = 1) to import these objects.
• AutoCAD fonts look awful in Revit. We run a lisp that changes our CAD standard font style to one of that TTF font styles. This lisp file also sets the DIMFRAC variable to “2” (Dimension style – no stacking)
• DWGs from Civil > Don’t import it unless you need it. These seem to have lot of issues and fatal errors.
• Create a separate workset for DWGs. You can switch them on / off. You can keep the DWG workset switched off by default too.
• Consider linking CAD Backgrounds to a separate RVT file and then linking this RVT file to your RVT project.