Furring Walls

[GilesAlington]

Recently we posted a request to Autodesk to provide a way to allow for the strapping and lining of walls to be removed during demolition and then new strapping and lining (possibly of a different thickness) to be installed.  The response was that furring walls provided this functionality.

We set up the existing concrete wall and furring wall and then added a window.  The outcome is contained in the image file below.  Now clearly a strapped and lined wall with a window needs to have the architraves etc on the face of the strapping and lining not on the face of the original concrete wall.  We through that the issue might be our window family but then tried the revit library window with exactly the same result.

We then investigated if we could some how attach the architrave and window reveal to the window family void as logic would suggest that the void appears to be cutting both wall structures.  This had no impact on the outcome.

Can anyone advise how you can model an existing strapped and lined wall allowing window and door openings to be placed in it with the architraves etc  on the outer most lining material.  Then allow the strapping and lining to be demolished, new strapping and lining installed that may be thicker or thinner while still allowing the window to have architrave on the outermost wall face.? 

Thanks in advance

[GilesAlington]

Attached are two images,.  The one titled Window furring wall correct is how we believe a window should act when placed in a joint wall.

[barthbradley]

Your Family has a Type Parameter named "Strapping Thickness".  Works like a charm for me. Is it not for you?  

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[GilesAlington]

So are you saying that there is a bug because what's the point of being able to join a wall and have a opening cut out the furring if the window doesn't react appropriately?
In the job we are working on there are numerous variances in the furring thickness so having to go through every window and adjust the "strapping thickness" isn't exactly efficient. If that's the only way then that's what we will do. But can you log a bug report. We are using Revit 2020.

[barthbradley]

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@GilesAlington wrote:
If that's the only way then that's what we will do. But can you log a bug report. We are using Revit 2020.

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Knock yourself out, dude.  I don't do BUG! reports - especially when there is no BUG! to report.  

...wait a minute! I think @ToanDN is doing BUG! reports tonight. I could be wrong. He might be working the morning shift.  😉  

[GilesAlington]

Just so we are clear the installation of windows and doors into joint furring walls is meant to hide the architrave in the wall. This feature is by design?

[ToanDN]

You say one thing (the installation of windows and doors into joint furring walls is meant to hide the architrave in the wall) but your picture (Window in furring wall correct.JPG) shows it outside of the new furring. Which one is correct?

[mgb228]

Classic Autodesk forum exchange- if the questioner phrases their issue in slightly the wrong terms, or using minorly imprecise language, the answerer plays a game of attrition by wearing them down with file and screenshot requests, and disingenuous claims that they just don't understand the question. 

This carries on until, like here, they eventually give up because unlike the answerer, they actually work in the busy field of architecture. 

Well I understood the OP's question perfectly.  Sadly I don't have an answer. 

[mgb228]

And let's not forget the Autodesk forum go-to response: gaslighting. 

There is no bug! 

[barthbradley]

[curtisridenour]

not a bug. Toan answered the question succinctly in message #2.

[Lachlan-JWP]

@GilesAlingtonit might help to remember that windows are a hosted element. They can read from and adjust to the element they are hosted to, in this case the concrete wall. Because the windows are not hosted by the furring & lining walls, they do not read any of the information associated with those walls even if they are joined. The openings are a slightly different matter, they do not create a void with a depth (which is what the reveal/architrave will need), but they create an opening (different from a void) in the host wall which the joined walls can then read from the host wall. Joined walls do not have a relationship with the hosted element and as such the reveals and architraves can not automatically adjust when they are present.

In your case, the advice given above to use an opening in the window family and separately model the reveal and architrave would be the most accurate solution as that is how the demo/construction will occur. You mentioned that you have hundreds of windows to model in this way and that this approach would be tedious to say the least. I might be worth asking if you have to model the reveal and architrave? Personally, I would use a note on the demolition plans to indicate that the reveal and architrave are to be removed and retained for reuse after new linings are installed, then show them as detail elements in the relevant views.