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halam

Placing dimensions (in need for tips & tricks)

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halam

Hi ,

 

I was wondering how you guys deal with dimensioning complexer shapes that just youre avarage walls of a condo. Especially with round objects and faces that are not parallel (in infra this is very likely) The wierd thing is that the Revit system finds endpoints midpoints etc., lines can drawn between these points in a view and so i dimension these drawn lines. But the great disadvantage of this is that they will NOT update if the model is changed. This workaround is not ment to be. The pitfall is that one forgets to check lines and dimensions in all these different views and the 'old' drawn dims do not match the actual 3D model (!).

 

I would really like to share some thought about dealing with the challenges involving dimensions or maybe annotating sizes in a different matter.

 

Thanks in regard

Hans

designing bridge structures and stuff

dims in revit.jpg

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RobDraw

Are you dimensioning in a 3D view?

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hlammerts

I do not understand you're question. The picture i posted is a section near a pilar of a fly-over. Do you know what that is, a fly-over ? I am talking about placing dimensions in sections, structural plan, detail view etc. etc.. (3d is not the question)

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RobDraw

What part didn't you understand?

 

The upper portion of the image you posted looks like a 3D view.

 

The dimensions on the lower portion seem to be at random elevations on a profile.

 

Am I wrong?

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halam

No! You are indeed wrong! It looks like but is not! I know a little revit what I am doing. You did not notice the hatches then? In is a view from a section as I described it!

Please read and keep you're mind to the question if you will..

Edited by halam

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halam

I uploaded this video. hoped my problem with dimensioning is understood somewhat more.

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RobDraw

I do not understand why you have to be so rude. I'm done here.

Edited by RobDraw

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halam

I was trying to be clear. You answer all my questions with a question. Which I do not like much. But maybe next time there can be more chemistry between my Q and you're A.

Edited by halam

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tzframpton

Halam, what I do is this: initiate the Aligned dimension, hover over the endpoint, and cycle the Tab key a few times. Keep watch for the dimension anchor to highly only a single dot - when it does, snap your first dim line. Do the same thing to the other end. This way the dimension anchors to the actual endpoint, rather than using pseudo techniques. When I find to dimension planes not parallel, this is my approach and it has yet to fail me.

 

You can also try the Linear Dimension tool rather than Aligned. The Linear Dimension looks for points, rather than planes.

 

Hope this helps. :)

 

-TZ

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halam

Thanks. Still, in many cases it will not snap.. (my cases)

I was wondering if there are possibilities to bring parameters, being dims inside a family, to be displayed as fields or tags outside it. Do you get the picture?

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tzframpton
Thanks. Still, in many cases it will not snap.. (my cases)

I was wondering if there are possibilities to bring parameters, being dims inside a family, to be displayed as fields or tags outside it. Do you get the picture?

It should snap, unless this is a circular Family. In this Section I can't tell if it's rectangular or circular. Can you confirm for me?

 

If it is in fact a circular column/pile/etc, then what you'll have to do is edit the Family to have Planes that flex to the diameters on the top and bottom. As long as the Planes are set to Weak or Is Reference in the Family, then you can dimension to it in a perpendicular view.

 

*EDIT*

Can you upload the Family so I can inspect?

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halam

No it really doesn't and as far as me and my colleagues know this is a know limitation. Like to grids not being parallel in combination with a section with a certain angle across. Is it possible for you to dimension this? With or without tab , there are plenty cases where we have to draw lines first.. I'm not the only engineer in office that manipulates it this way..

 

I will upload the model later. It is just a in place model we use very often. No two families are ever the same in civil :)

Thank you for helping me out sofar

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tzframpton
No it really doesn't and as far as me and my colleagues know this is a know limitation. Like to grids not being parallel in combination with a section with a certain angle across. Is it possible for you to dimension this? With or without tab , there are plenty cases where we have to draw lines first.. I'm not the only engineer in office that manipulates it this way..
It may seem that Revit has shortcomings but I can assure you it doesn't. The only time something cannot be dimensioned in Revit is when it logically impossible. But Families must be prepped in advance. I do know that AutoCAD has things like "apparent intersection" and other fancy ways to pull dimensions but they are not dynamically linked to the geometry either - same with the pseudo workarounds in Revit.

 

Again, is it possible for me to have a look at your Family? :)

 

-TZ

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halam

Right there : Logical impossible!

That is where I just need them.. :)

Happens often and we need these logical impossible dims.

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tzframpton

I'm still not convinced that what you're dimensioning is logically impossible based off the screenshot you posted. Sorry to keep asking, but can you upload the Family or at least post a screenshot of it in 3D?

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halam

The model attached. My question is this:

How can i dimension in a view the bottom and top of this pilar in such a way that dimension remain related to this subject?

In other words, when the size or the position of (e.g.) of an object is changed the dimension should follow properly! without having to use and work through any unnessesary 2D detailing.

 

 

I can think of two possibilities (but i do not know all the details ..):

- use of ref planes or ref lines inside the family

- use of variables inside the family which can be called upon (reported) in the view

 

 

Thanks a lot! :)

Hans

Edited by halam

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tzframpton

Okay. I see what's going on. You have modeled an In-Place Family, which is a big no-no, especially for things like Structural Columns. Things like this, halam, really need to be created as a Loadable Family with parametric attributes applied. Your Family lacks substance and is nothing but geometry. This is never good with Revit.

 

Here is a quick video I made in recreating your Family parametrically:

http://screencast.com/t/JoQErYEkh

 

Since I made the Column with Reference Planes, notice I can dimension it now. I've also uploaded the Family, although I don't have Revit previous to version 2015 so that's the version I have uploaded. Hopefully you have access to 2015.

 

If you use InPlace Families, Revit will continue to trouble you. With all sincerity, I cannot stress enough to create geometry such as this correctly. Since you're doing a bridge design, the bridge road would warrant an InPlace Family - that I can see. Simply placing Reference Planes within the InPlace Family at the right spots would then allow you to dimension it - if this is what you need to do.

 

Hopefully this helps you out halam. :)

 

-TZ

Example_StrcColumn.rfa

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halam

Always good to have somebody opinion how to model things in Revit and why they think it should be done in a other manner.

Thanks for the tips. I will discuss this.

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tzframpton

No problem, Hans. Since you were willing to give me an example, it greatly helped me in helping you. :)

 

Let me know if you need further assistance.

 

-TZ

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