Revit rebar constraints are disaster :(((

[Anonymous]

Hello!!

Seee image below!

I want to drag upper part of highlighted rebar up to protection layer (marked red in picture).

Revit just doesn't let me to do it for no reason. I have unchecked all constraints and also tried to set them on 0 or different values, writing rebar dimensions in A,B,C doesnt help too, picking another host is also not a solution because it (host) can be modified (moved, deleted), which will affect rebar.

Is there one button that can remove all Revit created constraints from selected rebars and let engineer (who knows it better) decide where rebar should be located and allow full freedom when dragging blue arrows and writing rebar dimensions?

Thanks!

[Max.Kotsar]

Hi, v.pancakovs!

Can you upload your file to forum?

[Anonymous]

hi Max Kotsar,

Unfortunately i can't do this, project file is confidential, when i try to make new file, this particular case works there, and rebar is not attaching to some weird places. But i have had this problem million times in other cases since Revit 2012.

What we need is just one button or solution to remove revit calculated constraints from rebars, and let engineers to drag and move them freely.

[Max.Kotsar]

Try to set Rebar Constraints like on images below:

[Anonymous]

Thank you Max Kotsar!

This might be a solution for one particular case.

Unfortunately in my project I have 5 storey building with area 3600m2 of one story and if I have to do same procedure for every rebar/rebar group in my project, also considering that I have to find those weird constrained rebars first, it will take ages, which makes Revit completely inefficient and too expensive because of time consuming modelling.

In this case Revit needs one button to remove all constraints from selected rebars and let engineer to type values A, B, C and they will appear in schedule grouped under one mark of rebar.

[Anonymous]

I absolutely agree, it takes me twice as long (even longer sometimes) to create column rebar because of the constraints overriding where/how I want the bars placed. It's extremely frustrating. Please Autodesk do something about this.

[aiham_rk]

If there are a choice to disable automatic constraints this will be great move

another thing: two choice for constraints must be available: to object faces and to other rebar , mixed between two choice is disaster and take long long time to fixed problem due arbitrary rebar constrain relative to other one

for similar shape at same object we need choice to select multi instant and constraint all to one face, like instance properties: we can assigned value to shared properties

[aiham_rk]

three minutes to copy one rebar! , this operation need all windows resources, why?
Because autodesk not listen to engineers work on revit program, the automatic constraints against other rebar is disaster, it work for simple project, but real one … definitely no, they refuse to give human mind full control on revit rebar objects, they think that piece of inelegant! code Can replace engineering mind.
Stop automatic constraint … let users select if they need to activate it or not, this is very simple, revit users need freedom, no more dictators!!


https://www.youtube.com/watch?v=6uHvh2Uv-iU&feature=youtu.be

[KIMRAMFI]

Ode for this thread!

Would want really badly to see one talented Autodesk engineer to create difficult wall reinforcement because of the automatic constraints. If I model the bars I want to decide the correct placement inside the wall! How hard it can be to understand that? Don´t try to make everything too easy just let us to do our work.

[peticid]

Hi Kim,

It is good to read about your interest in rebar constraints behavior. Since this is quite an old thread, I would like to say that the constraints editing has been changed, starting Revit 2017, when the Graphical Constraints have replaced the dialogue box shown in the posts above. Then, in 2018 we enabled the editing of the constraints in 3D views, to make rebar modelling even easier. More details can be found here:

https://knowledge.autodesk.com/support/revit-products/learn-explore/caas/CloudHelp/cloudhelp/2019/EN...

I am really interested to find out more details about the problems you face with the rebar constraints and which version of Revit you use. I totally agree with you that we need to create tools that offer you the capability to model rebar as you would expect as easy as possible, therefore we would like to investigate the particular cases you are working on. I am going to send you a private message with details about how you could share your models with us in a confidential way.

Kind regards,

[KIMRAMFI]

Hi!

Thanks for your answer. Yeah I know that this is quite an old thread but it just looks bad to your side because for example my 2017 rebaring project I still face several problems with constraints.

For example stirrups, i want to change the width because i don´t want any overlapping rebars. NO! First I change the width and it changes from another side, then I try to move it to correct location. NO! It wont move and I am sure that there is no obstacles for moving except the **** constraints. For some reason I cannot edit the constraints and cannot move the rebar. 

Here  couple of development ideas for you:

• Stirrup when changing the width it calculates it from center (both sides move accordingly)
• Lock the rebar, after locking it wont move anywhere or change any of it´s dimensions.
• Group rebars as one rebarset. (tagging would be much easier)
• For voids I could decide is it affecting to rebar cover or not
• Symbols inside rebar shapes
• And the constraints. Please, let me decide where the rebars goes!

[peticid]

Hi Kim,

Thank you for sharing these details with us. First, let me make one comment about the rebar constraints availability in the picture you have shown. It looks like you are using Revit 2017, and in that version, they did not work in 3D views. If you go into 2D views, you should be able to edit the rebars.

Secondly, I really like your idea of changing a stirrup, considering its center and adjusting it symmetrically. Also the one about locking the rebars. Therefore, I recommend you to have a look at the Revit Idea Station and post them there, to gather the community's feedback. You may also review and vote for other proposals.

Next, I'd like to understand a bit more the following ideas:

•  "Group rebars as one rebarset" - Could you please describe this more, with some use cases?
• "For voids I could decide is it affecting to rebar cover or not" - You can edit the individual covers for each face, to make them fit your needs.
• "Symbols inside rebar shapes" - Do you mean the rebar bending details?
• "And the constraints. Please, let me decide where the rebars goes!" - Because this is a broader issue, best would be if we could first have a look at some of your Revit models, understand the challanges you have today, and then see what improvements should be done. Please use the coordinates I have shared with you privately to upload any information you could share with us

Kind regards,

[KIMRAMFI]

Hi!

I tried change the constraints also in 2D view and it did not allow me to move the rebar. I figured out that the problem was because one of my voids in wall. Thats why it would be great to be able to select is the void affecting the rebar cover or not. Image below

I just woud want to keep those two bars as one set and move the another one into that red marked area. It is impossible and annoys me.

Grouping the rebars  I ment that i could select individual bars and put them as a one rebar set.

Now there is one rebar set containing two bars and two individual bars. The first numer of tag is showing the quantity of the bars. If I just could select all four or at least two rebar sets and combine them as a one rebar set it could help tagging a lot. 

For void you can see the first image. I don´t want that element groove to affect to the rebar cover because anyways the gaps will be filled with concrete so it does not matter if the rebars are too surface. I dont need to edit the cover thickness because mainly it is correct but in concrete elements there will be lenty of objects and voids.

Symbols inside rebar shapes I ment for example the stirrup symbol and ending marks etc. like below

I think the first image shows the best what kind of issues i am having. What do you suggest how I can move the rebar to the correct position?

[peticid]

Hi Kim,

Thank you for the additional details.

With regards to the first issue, of placing the rebar inside the cover, you may use the "Edit Constraints" command to place it as such. Please have a look at the picture below.

 I think your idea of grouping bars is very interested, so you should post it on the Revit Idea Station, so others can vote for it, too.

For the symbols you have showed, I recommend you to explore the Revit apps specialized on delivering custom solutions for rebar detailing.

Please let me know if placing the rebar according to your needs works.

Kind regards,

[Nurlan-A.]

Revit 2019 - rebar constrains still a disaster. 

[KIMRAMFI]

@peticid and his colleagues have been working hard with this and in near future this will change a lot. I am pretty confident that we will get help soon. 

There is some glimpse about it on the public roadmap.

https://blogs.autodesk.com/revit/2019/01/23/revit-public-roadmap-january-2019/