About Changing the Roof Line and the Floor Line of a Curtain Wall

You can modify the roof and floor lines of a curtain wall to create a non-rectangular curtain wall:

You can also create non-rectangular roof and floor conditions by projecting to polylines.

AutoCAD Architecture toolset offers multiple methods of editing roof lines and floor lines. You may want to begin by graphically creating a custom roof line or floor line condition. You can then fine-tune that condition by specifying precise values in the Roof/Floor Line worksheet on the Properties palette.