1.   Lately, Ms. Maddex and Gluck have been previewing the proposed building, a vertical stack of glass and plastic facades.

2.   Now I have to replace it, but the only replacement that I can find is designed to attach to a vertical stack.

3.   On the east side, the screen breaks away to reveal a barrel-vaulted pavilion housing the vertical stacks.

4.   The dryer in that house vented into the vertical plumbing stack.