To Offset or Project the Floor Line of a Curtain Wall

Use this procedure to change the height or the shape of the floor line of a  curtain wall:

• Offset the floor line from the current baseline of the curtain wall.
• Project the floor line of the curtain wall to a polyline.
• Project the floor line of the curtain wall to another object, such as a floor slab or stairs.

You can also create a polyline that represents the current floor line of the selected curtain walls. You can then use this polyline to change the floor line of other curtain walls.

Note: To project the floor line to a polyline, draw the polyline first in Elevation view. For best results, the polyline should be parallel to the curtain wall. The polyline does not need to be in the same plane as the curtain wall.

1. Select a curtain wall, and click click Curtain Wall tab Modify panel Roof/Floor Line drop-down Modify Floor Line.

   The current floor line is the default value in the curtain wall style.

2. Change the floor line of the curtain wall:

   If you want to …	Then …
   offset the floor line from the current baseline of the curtain wall	enter o (Offset), select the curtain walls to change, and enter an offset distance. Enter a negative value to offset the floor line below the current baseline.
   project the floor line to a polyline	enter p (Project), select the curtain walls to change, and select the polyline.
   generate a polyline of the current floor line	enter g (Generate), and select the curtain walls for the polyline to be created from.
   project the floor line to another object, such as a floor slab or stairs	enter a (Auto-project), select the curtain walls to change, and select the object to project to.
   remove any changes to the floor line	enter r (Reset), and select the curtain walls to change.

3. Press Enter.

   The new floor line value is used only in the selected curtain wall. The curtain wall style is unchanged.