Rooms not vertically constrained despite room-bounding floors

[cwaluga]

The following problem pops up in our customer support every now and then and it is kind of frustrating to not know what to suggest. I managed to reproduce the behavior in a simple example which is attached (Revit 2018).

The setting is as follows: we have a room, which is as simple as it gets (4 walls, ceiling/floor both set to room bounding). Perhaps it is modeled in a structurally questionable way but I see no reason why my architecture room should not bound itself correctly from an algorithmic point of view.

The fact that makes it even weirder: Link the given architectural file into an MEP document, place an MEP-space at the same position and observe that it is correctly bounded. Can anyone give some advice to cure my headache?

[ToanDN · Accepted solution]

Have you set the Room & Area to compute Areas and Volumes?

[barthbradley]

Truly weird. What are the Limit Offset and Base Offset Property Parameters reading?  

[cwaluga]

Very fast and very correct. Seems like this is the default in most mechanical templates while it is not in architectural ones. I knew this option existed, but I did not expect this to be the cause of such problems. Makes sense now. Thanks! 🙂

[ToanDN]

True.  Mechanical template has Volume computation as default because space volumes are critical for mechanical design.   

[barthbradley]

@ToanDN: Can you replicate?  I'm trying , but cannot. 

[ToanDN]

You can open his original Revit file.

[barthbradley]

Thanks. Interesting though; when I opened the OPs file, Areas and Volumes are already checked.  Also, when I deleted the original room and replaced it with another, the room had a default Limit Offset of 5.55 which was automatically applied.   I guess these settings don't zero out.  Good thing to be aware of.  At least they don't affect Volume calcs. Room is bounded properly.  

[ToanDN]

Maybe you opened the the file I already revised. When I opened his file the Volume option is not checked and everything is exactly how his screenshot showed and how he described the issue.