topic Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght in Revit Structure Forum

Adding parameter for dividing circular free form rebar exceeding 12m lenght

REDO10 — Mon, 07 Mar 2022 15:52:34 GMT

Hi All,

In my circular tank project my reinforcement are mostly circular and I used the free form rebar option to draw the different shapes I have (see the picture bellow).

My problem is that the circumferences of my circular rebars exceed 12m and the rebar unit length is 12m so how to divide the circumferences over 12m to compute the exact number of bars having 12m and put their number in the schedule? (is there any parameter or formula to add to the free form rebar to split the length if it exceeds 12m?).

Thanks.

Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght

ovidiu_paunescu — Tue, 08 Mar 2022 13:30:15 GMT

Hi @REDO10

What you can do to split those bars is to create some additional geometry (that can host rebar), edit the bar constraints and constrain the bar ends to the opposite faces of those elements.

In a simple example I used some walls and constrained the ends of the sets to the far face of each wall. Thus, the thickness of the wall gives the overlap distance.

When editing the constraints you can click the face/cover control to constrain to the face, so that the cover doesn't subtract from that overlap distance.

To check the lengths, one thing you can do is open a schedule side by side with the view. If you set the numbering of varying sets to number with suffix, each set will get a rebar number and each bar in the set will get a suffix.

I wrote a more extensive example about this particular workflow and more about working with rebar constraints in my AU 2019 class

Rebar Modeling in Revit: Keep It in Check | Autodesk University

Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght

REDO10 — Wed, 09 Mar 2022 10:43:52 GMT

Hi @ovidiu_paunescu

I more or less understood your approach but it's complicated and take more time for the whole rebars in the project!!

is there any way to do that with a formula or using dynamo ?

Can you please do that for me only for one rebar set that I left in a portion of my file attached bellow to well understand?

and show me please how to do a schedule side by side as you say

NB:

Notice pls that I use REVIT 2021.

Thanks.

Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght

REDO10 — Wed, 09 Mar 2022 10:52:03 GMT

Hi @ToanDN

please take a look to my post

any idea to my problem?

Thanks.

Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght

REDO10 — Mon, 14 Mar 2022 13:57:23 GMT

Hi @ovidiu_paunescu

Please take a look at my file above and see if you could show me how to do a Split just for one rebar set which I've left there in the file and in the same time tell me how to do a rebar schedule by face.

Thanks.

Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght

REDO10 — Mon, 14 Mar 2022 14:14:02 GMT

@ovidiu_paunescu

Moreover, why I got the same number for two differents rebar set of my slab although their lengths and partitions are different? (see the picture bellow)

how to fix this in the rebars schedule?

Thanks.

Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght

ovidiu_paunescu — Mon, 14 Mar 2022 15:31:55 GMT

Only bars in the same partition are compared when doing numbering. That is how Revit works.

You can use another parameter for grouping rebar in the schedule - comments, host mark or some custom shared parameter, instead of the partition.

Regarding your other question, you can't split the bars by a formula or parameter.

If you use dynamo, you need to define the logic that creates the bar geometry inside dynamo and then use a node that creates a free form rebar set from a list of lists of curves. The top list defines the set, the next level lists hold all the curves that make up the bar geometry.

When creating free form rebar using Revit, you need to define the bars without fillets, because those are created automatically.

Another way to create those bars, is to split the geometry of the tank into pieces (like pizza slices) and define sets for each piece. You can adjust the offset of bars at their ends, to get the overlap, or model the pieces overlapped.

Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght

REDO10 — Thu, 24 Mar 2022 11:21:44 GMT

Hi @ovidiu_paunescu

Thanks for your last reply

@ovidiu_paunescu wrote:
Only bars in the same partition are compared when doing numbering. That is how Revit works.
You can use another parameter for grouping rebar in the schedule - comments, host mark or some custom shared parameter, instead of the partition.

I tried to renumber rebars according to the parameters that you quoted in your post but I got lost!!...

I would like to classify the slab's rebars in the following order:

radial rebars in slab's bottom layer
radial rebars in slab's top layer
circular rebars in slab's bottom layer
circular rebars in slab's top layer
sump's rebars

So, I have the following questions:

1- why my all rebars's host mark are grised in the proprieties tab? ...how can I define them to group the rebars in a successive order according slab's layer in first then rebar lenght ? (see picture bellow)

2- why do I get the same number for two different rebar shapes although I have classified them in different partitions? (see picture bellow)

So, pls check out the portion of my attached file bellow and see if you can show me steps to doing for renumbering my slab's rebars as I described above to well understand!!

Thanks

Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght

REDO10 — Sun, 27 Mar 2022 10:03:10 GMT

Hi All,

Hi @ToanDN

Please how can I assign Host mark to renumber my rebars ??

I cannot do it....Host mark option is grayed out in proprieties tab!!!

Thanks

Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght

ovidiu_paunescu — Sun, 27 Mar 2022 10:08:29 GMT

Hi @REDO10

The value of Host Mark is equal to the Mark value of the Host. If you give the rebar host a mark, it will appear in this field.

When Revit numbers the bars, it only compares the bars in the same partition. This is why different bars in different partitions can have the same number.

In the Reinforcement settings > numbering, you will notice that you can define the start number for each partition. This is how you can influence numbering.

All the other parameters can be used to group and sort the bars in the schedule, but not to change the rebar numbers.

Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght

REDO10 — Sun, 27 Mar 2022 10:14:51 GMT

Hi @ovidiu_paunescu

And How can I assign a mark value to the host?

Thanks.

Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght

ovidiu_paunescu — Sun, 27 Mar 2022 10:16:44 GMT

Select the concrete host and add a value to the Mark parameter displayed in the properties palette. If you add the same value to two different elements, even if they are identical, Revit will show a warning that you can ignore

Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght

semi — Mon, 28 Mar 2022 14:34:30 GMT

yes, you can apply a formula for lengths longer than stock length but it requires a bit of changes to your tags and rebar families.

See example for a bar with length 13m which converts to 13m60

Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght

semi — Mon, 28 Mar 2022 14:37:30 GMT

based on this formula I've created in Excel:

Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght

REDO10 — Tue, 29 Mar 2022 09:08:10 GMT

Hi @semi

Thanks for your reply

@semi wrote:
yes, you can apply a formula for lengths longer than stock length but it requires a bit of changes to your tags and rebar families.
See example for a bar with length 13m which converts to 13m60

I am tempted by using your method and your formula, so please check out my attached file above and see if you could show me how to proceed because I am not an experienced REVIT user

Also, Please be kind enough to send me the modified rebar's TAG family that you used in your example.

Have a nice day

Thanks.

Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght

semi — Tue, 29 Mar 2022 09:20:31 GMT

Hi,

as much as I would love to help you out, but the screenshot I've showed you is the result of years of work. I just simply can't give away all this work just like that. This is not how things work for BIM-Managers or Revit project model coordinators.

We are constantly developing our template and we learn every day from it.

I just wanted to show you that it is possible.

Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght

REDO10 — Tue, 29 Mar 2022 09:26:30 GMT

Ok no problem for that

Thanks again.

Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght

REDO10 — Thu, 31 Mar 2022 14:01:23 GMT

Hi All,

Hi @ovidiu_paunescu

sorry for these new questions, because I can not yet mastering rebar's numbering as I want and parameters that must be used or not!!

for more detail, my idea of numbering is to number in first all my slab's rebars shown in the picture below as I explained earlier in the following order:

radial rebars in slab's bottom layer
radial rebars in slab's top layer
circular rebars in slab's bottom layer
circular rebars in slab's top layer
sump's rebars

Note: I filtered and grouped all these types of rebars in the table to control their graphic visibility as follows:

So those are my questions:

Do I need to group these types of rebars in the same partition to have a continuous numbering sequence or define a partition for each type?
how to set the numbering sequence in the table as shown below:

sequence from 1-16 : (radial rebars in slab's bottom layer) + (radial rebars in slab's Top layer)
sequence from 17-23 : (circular rebars in slab's bottom layer) + (circular rebars in slab's Top layer)
sequence from 24-44 : sump's rebars

Note: even by defining a partition for each rebars's set I sometimes get the same number for two different rebars shapes??...How do I can fix this?

3. why all the numbers of my circular rebars are not displayed in the proprieties tab, but they are in the view (see picture bellow) ? and how REVIT can number them?

Thanks.

Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght

semi — Thu, 31 Mar 2022 14:01:52 GMT

hi again,

- to start numbering from "17" in your case now, simply change "1" in the "début" table to "17"

- the reason your number is not visible is because you selected multiple rebars and because they all have a slightly different length they all have an individual number. The rebar marks for that selected group will be a lot of number with a range from "..." to "..."

also keep in mind that your visible rebar number in the tag is incorrect. It is probably set to a "comment" or "mark" parameter

Re: Adding parameter for dividing circular free form rebar exceeding 12m lenght

REDO10 — Thu, 31 Mar 2022 14:05:08 GMT

@semi

please read again corrections I give in my last post

Thanks.