Mass Wall Corners - Unpredictable behavior

[Anonymous]

Hi, first time posting here!

I am a moderately experienced Revit user and can't figure out why I am getting two different results when I create Mass Walls using identical methods. In the photos below you can see two corner conditions. Photo 1 shows the desired connection, and photo 2 shows the undesired connection.  These corner conditions come from two separate masses, however, both masses were created the same way; imported from Rhino using the 3dm import inside of a conceptual mass.  The modeling method inside of Rhino for each mass is pretty much identical.  I've tried recreating the geometry, reimporting, creating a completely new mass family. The Join tool does not work

Has anyone experienced this issue? Or have any idea why the walls in photo 2 won't extend to complete the corner.  Been working on this for days, any help would be immensely appreciated!

Cheers,

Mark

[ToanDN]

The first one is a 90 degree corner and the second one is a smaller angle?

[Anonymous]

ToanDN,

Thanks for responding! You are correct, but that doesn't seem to be the issue.  Here is a corner from the first Mass that is not 90 degrees, and still joins correctly. 

[ToanDN]

Can you share the mass and the walls not joining correctly?

[Anonymous]

Attached you will find the Geometry in question.  Thank you so much for taking a look!

[Anonymous]

You might notice that one of those corners has an extra face, that was just an issue on the last export. The other corner exhibits the join issue, but is correctly modeled. 

[ToanDN]

Something is wrong with your mass.  I couldn't edit it (import?) so I rebuilt one for the outer shape based on the existing geometry, cleaned up the corner, and the walls join okay.

[Anonymous]

Thanks for taking a stab at it.  The mass was indeed from imported geometry.  I don't know how to make this geometry using the Revit massing tools, as it requires irregular split surfaces. 

It appears that your geometry was just a vertical extrusion? Two of the walls in my imported geometry have a bit of a cant or slope to them. I'm wondering if this is why they will not join. 

I did discover that a band aid solution is to flip the location line of one of the walls at the corner, so it folds in on itself. 

[Anonymous]

Ahh actually after opening your model, I see that it wasn't just a vertical extrusion.  Must have something to do with the import.