I have a soffit condition that uses the same panels as the curtainwall so I would like to use the same units that I've already created.

The question I have is: Can a curtain wall be created with its exterior face opposite of the floor beneath it?

 I've tried:

 Rotating a vertical CW - no luck

 Setting a vertical ref plane active and using that as the base for the wall - didn't work

 Creating a mass object and selecting a face for the wall by face - only the vertical faces were selectable

 Creating a mass object, changing a vertical face to a CW and then rotating the object so the CW was face down - wouldn't rotate

 Creating a mass object on a vertical ref plane, selected a horizontal face for the Wall by Face tool - received the message "Wall type 'Curtain Wall 1' is incompatible with picked face. Only basic wall types are accepted."

 Can I create the curtain wall that I'm trying to?

 Thanks,

 Jon