Attaching a Wall to a Stair

For those of you trying to attach a curved wall to the underside of a stair:

1. Model a stair and a wall (stair hidden below)

2. Model an in-place family of the floor or roof category (shown below)

3. Use extrusions for steps (ex. below). Use a swept blend for a sloping ramp or monolithic stair

4. Attach the top of wall to this in-place family

5. Set the in-place family as temporary (ie. phase created and phase demolished are the same) 

I’m sure you can imagine many more uses for temporary elements.