Originally Posted by
lpiburn
I agree. No nested families are necessary, just make sure your shaft extrusion and pipe extrusions are both locked to the reference plane that is controlled by the "Height" parameter damon described.
A note of caution. This type of construction might be better suited to actual project geometry such as walls and shaft openings. There are often times where floor to floor height will vary between stories. (eg. ground floor to 2nd = 14'-0", 2nd floor to roof 13'-0") If this is the case your family will not be able to adapt without some additional customization. If you use model geometry you can tie the elements to their appropriate levels so that as your building flexes your shaft flexes with it. Just a thought.
-LP