Fire-Rated wall styles won't "join" to any non-Fire-Rated wall styles.

[TCAOffice]

I have a very basic model.  One story.  All walls have no base offset, the same top constraint, no profile edits, no different materials within the wall.  The only difference in the walls is that one Style has a "1 HR" selection in its Type so that I can use filters in a different view.  I have no filters set in this view. 

In my plan view, at Medium and Fine detailing; none of the Fire-Rated wall styles will join with any non-Fire-Rated wall style.  I'm using Revit 2020.  The wall styles are simply one layer of varying CMU thicknesses; but even walls of the same thickness; identical in every respect other than the Fire Rating; will not join at all. I've scoured the forums and the entire internet and no one seems to have ever had this problem.  So I'm hoping someone here has.  

Any thoughts?    

[barthbradley]

Not quite understanding your description.  Can you post some pictures or the file itself? 

[TCAOffice]

Sure.  Here is a screenshot of what I'm talking about. 

The wall running up the page on the left, and the lower wall running across the page, have "1 HR" in their type. 

The wall running up the page on the right, and the upper wall running across the page; don't.  

All else is identical in their wall styles.  They have identical base constraints, base offsets, top constraints, unconnected heights, location lines, worksets, phases, and everything else. 

But you see the black line where the two disparate wall styles are butting instead of intersecting like they are with their similar wall styles.  All I do is remove the "1 HR" from the fire-rating field in the type; and they all intersect smoothly.  Or, I make all of them "1 HR"; and they intersect smoothly.  

I've tried to modify wall joins, disallow/allow joins, drag to interior edge, exterior edge, centerline.  I've tried simply joining their geometry.  Nothing works.  

Does that make sense?

[barthbradley]

Thanks for posting the picture. I'm still puzzled as to how the join condition is affected by changing the "Fire Rating"  parameter - which is a Text Type Parameter.  It's just information.  Maybe it isn't the OOTB "Fire-Rating" Parameter that I'm thinking it is. Maybe its got "special powers". Love to examine the file. Can we go there?   

[martijn_pater]

It's not a view filter? Seems like it could be a view filter... any linked geometry? #puzzled

[TCAOffice]

There are no view filters applied or even loaded.  

[martijn_pater]

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@barthbradley wrote:

Love to examine the file. Can we go there?  

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 ...

[TCAOffice]

I wish I could.  But it's a government project that I can't share.  Not that it's "top secret" or anything; but you know how it is.  

I'll try to duplicate the issue in another file with the same information; but none of the gov't design or standards.  

And no, there's no Parameter set for the fire rating.  The only reason I included "1HR" in the wall type is so that when I create the Egress Plan I can use a view filter to show the fire-rated linework I have set up for those type walls.  This view does not even have that filter loaded.  

But I've just discovered something weird.  I have two wall types:  1HR rated and non-rated.  Each one is identical except for the "Fire Rating" field.  One was created by duplicating the first and simply adding the "1HR" text into the Fire Rating field.  

Now, when I have the two walls that aren't intersecting properly....and I flip one of the walls to the other wall style - they intersect just fine.  

But, when I have the two walls that aren't intersecting properly....and I go into the rated style and simply remove the "1HR" from the "Fire Rating" field; leaving it blank - they still don't intersect.  

I posit: WTF?  

[barthbradley]

Some intelligence has obviously been built in. I would need to do an "autopsy " to figure it out.  I don't need to see the whole project or any proprietary stuff. Just the elements behaving "strangely". Enough to replicate what you are describing. You can always group and save out a portion of the project to a new RVT and post that one here. 

Offer stands. 

[ToanDN]

That is by design. GWB layers of a fire rated wall are not meant to join with those of a non rated wall or the fire rating would be compromised. Just look at any UL listing on fire rated walls.

[TCAOffice]

There are no GWB layers in either of my wall types.    

[ToanDN]

That was an example to illustrate the intent.

[TCAOffice]

Ahh.  Okay.  So you're saying Revit intentionally won't intersect rated walls with non-rated walls - regardless of their material composition.  

Alright then.  Thank you.  I couldn't find that reasoning anywhere.  I can see the logic in it, but there should be an override for when it doesn't need to happen.  

I appreciate the info!  Thanks!

[barthbradley]

@ToanDN: Are we talking about the same thing here? The OP stated: "All I do is remove the "1 HR" from the fire-rating field in the type; and they all intersect smoothly. Or, I make all of them "1 HR"; and they intersect smoothly."  

[TCAOffice]

I think so.  From what was stated it sounds as if anything other than a blank in the Fire Rating field initiates something that won't let walls intersect without a visible dividing line.  

[barthbradley]

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@TCAOffice wrote:

I think so.  

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I don't think so.  

[ToanDN]

If you want the walls to join without the line, don't use the built-in Fire Rating parameter, add another parameter to Walls category to enter the fire rating information.

[TCAOffice]

Yes, exactly.  Now that I realize that "feature" is built-in; I'll do the usual Revit practice and create a work-around.  Thanks!  

[barthbradley]

[TCAOffice]

Well then my question still stands.  If it's not something automated within the Fire Rating field parameter, then I'm once again stumped.