You can embed a wall into another wall, a wall into a curtain wall, or a curtain wall into a wall. 
- Sketch a host wall of any type in the drawing area. The host wall can be a straight wall or an arc wall. 
  
Note: You can embed a wall in an elliptical wall by picking the elliptical wall. However, you must manually cut the host wall with the embedded wall. 
  
- Sketch a wall that will be embedded into the host wall. 
	 Keep in mind the following when you are sketching the wall: 
	  - If the host wall is an arc wall, the embedded wall must be a concentric arc. 
		
- Be sure the embedded wall is smaller in length and height than the host wall. 
		
- If the embedded wall is within the boundary of the host wall, 
		  Revit issues a warning and advises you to use the Cut Geometry tool. 
		
 
- Click Modify | Place Wall tab  Geometry panel Geometry panel Cut. Cut.When using the Cut Geometry tool, do not select the shorter wall first and then the larger host. 
	  
- Select the host wall. 
  
- Select the wall to embed into the host wall. 
	 The wall is now embedded. If necessary, resize the embedded wall by selecting it and using the drag controls.