Stacked Wall - Height Control

[cek]

We're starting to use more stacked walls and short of going into the properties structure and setting the heights for each wall segment, which appears to be a "Type" control affecting all of the walls, is there any other way to control the wall segment heights?

For instance: I have drywall terminating at 6" above the ceiling and as the ceiling elevation changes I would like the drywall termination to adjust accordingly. I've tried to lock to a Level, Reference Plane and even tried a locked dimension but none of these can maintain the 6" offset relation to the ceiling.

A similar case could be made for the parapet's relation to the roof diaphragm. The stem wall and top of parapet are not an issue.

Of course this limitation is in 2009. Has 2010 fixed this?

Another feature which would be nice is to be able to modify a layer of a wall via the edit profile control. Typically this would be where you have step flashing. Currently I apply a separate wall locked to the face of the structural wall to achieve this but inevitably run into joining and parametric control issues.

[archjake]

Carl,

I'm glad I'm not the only one who sees the need for this. Where we get into trouble trying to model the real world is at the sloping roofs or ceilings. I have not used stacked walls for quite some time due to this limitation - and others.

I just tried it in 2010 and it seems to have the same limitations. That and I got 2010 stuck in the edit wall profile command and could not quit out or finish (bug?).

It is easy to unlock a finish layer on one side of the wall and keep it horizontal (Think EIFS screed condition where overlapping edge of FFE).

The easiest way that I can think to currently handle this is to draw walls independently on top of each other and edit their profiles. More work and error prone but gets the job done. The stacked walls feature could use some work.

[cek]

It's limitations like this that make accurate model construction more difficult and time comsuming. Not to mention the instability created in the parametric model that results from our work arounds for this limitaton. Consequently this makes me question whether Revit is ready for I.P.D.

One primary tenant of I.P.D. is the delivery of an accurate 3D building model. Without that our liability as Architects is increased dramatically.