Rectangular layout pattern for Rebars

[farzanbayat74]

So first of all, I wanted to say that I know this feature is available in other 3rd party plugins. Here I'm talking about having this necessary feature as a native Revit Tool for people who are willing to do their task within Vanilla Revit without the need for another plugin.

One of the most common Rebar drawing cases, is column and beam rebars. Currently if you want to draw rebars for a column, you can't simply choose a rectangular patter, but you need to draw rebars in a line pattern multiple times, or draw one and copy that.

So you are forced to repeat a task multiple time to get it done.

Also if you want to stretch those rebars, you should constraint those rebar sets to each other, so you can stretch them together.

I believe that it is needed to have predefined rebar pattern. so user only decides the number of bar in two orthogonal direction, and Revit places them with equal spacing in the column perimeter.

For L shaped Column, it's easy too. Simply one rebar in each corner, then distribute the rest of them between corner bars.

INVITE OTHER STRUCTURAL FELLOWS TO VOTE FOR THIS. SO HOPEFULLY IT GETS IMPLEMENTED SOON. THANKS.

[roman774477]

Informative 

[mahmoodalimirzaie]

That is a good idea. Drawing line rebars multiple times is so annoying...

[irinakarov33]

something fast like tekla is good

[nili_ed_folin]

Hi @farzanbayat74 .A rectangular pattern makes job easy.

How can we do this?

[farzanbayat74]

Hi @nili_ed_folin ,

This is my current routine:

1) Draw 2 rebar sets.

2) Mirror them across column axis.

3) constraint top of rebars to each other.

Problems:

1) time consuming and prone to human error in real life projects.

2) When you show the column in a elevation view, you can see only 1 of rebar sets (out of 4 separate sets) and when. you tag that rebar, total quantities of column rebars are not shown correctly.

M solution:

Having a rectangular layout for rebars so:

1) No need to draw longitudinal rebars multiple times or mirror them.

2) Also no need to constraint top of rebars to each other. So When you select 1 rebar and stretch it, all other rebars are stretched too.

3) For tagging purposes, when you select any of the rebars in any elevation view, quantity will be correct.

4) When select any rebar, all rebars are selected, then you can quickly change rebar size.

Do you have a solution Mr. @ovidiu_paunescu ?

I think a new <<Rectangular Layout>> for rebars can solve all of these issues easily. Please kindly consider it. Thank you.

[ovidiu_paunescu]

I think for circular patterns it's straightforward, you have a set with bars going around the circle and you define the number of bars or spacing.

For the rectangular layout there are some considerations. You probably need to have bars at any corner of the stirrup, and then the rest of the bars distributed at a certain spacing between those corner bars. 

You probably also need to have bars at intersections of stirrups in the same element (inner stirrups).

Maybe we could define a layout by selecting stirrups. If you select a rectangular stirrup, you get 4 bars at the corners plus bars in between. If you select multiple stirrups, you get bars in corners and stirrup intersections, plus in between.

Does this make sense?

How does propagate rebar factor into this? Does it help to reuse reinforcement you already modeled?

Some other considerations about free form rebar:

For circular columns, you can use free form rebar aligned distribution, selecting the outside faces and the perimeter circular edge as distribution path.

For rectangular columns, if you do the same you will notice that bars are just distributed by length and don't account for the corner position.

[farzanbayat74]

Hi @ovidiu_paunescu , I hope you are doing great.

My responses to each part :

" Maybe we could define a layout by selecting stirrups. If you select a rectangular stirrup, you get 4 bars at the corners plus bars in between. If you select multiple stirrups, you get bars in corners and stirrup intersections, plus in between.

Does this make sense? "

My suggestion which is a bit different :

step 1) Add a parameter to stirrups named something like "Ruling Stirrup"

step 2) Specify number of rebars in 2 orthogonal directions. For example 5 rebars in X direction and 8 rebars in Y direction.

step 3) longitudinal rebars are distributed  in X and Y directions with respect to the geometry of the "Ruling Stirrup".

step 4) Inner stirrups and ties are added after this by the user, based on the position of the longitudinal rebars.

" How does propagate rebar factor into this? "

My suggestion for Coding this : User selects a stirrup set to be the "Ruling Stirrup" in the column or beam. Now when we propagate longitudinal rebars, Revit looks for the "Ruling Stirrup in the destination host" and then places longitudinal rebars based on the geometry of the ruling stirrup.

"Does it help to reuse reinforcement you already modeled?"

It will surely does and solves the issues that I mentioned in the previous comment.

" Some other considerations about free form rebar:

For circular columns, you can use free form rebar aligned distribution, selecting the outside faces and the perimeter circular edge as distribution path.

For rectangular columns, if you do the same you will notice that bars are just distributed by length and don't account for the corner position. "

For circular sections, yes. You are right. But for the rectangular sections, aligned command doesn't work properly and rebars are not placed at the correct places. So I think no predefined layout pattern is needed for circular ones.

[ovidiu_paunescu]

Thank you for your suggestions!

My question about propagate was more in the direction of using it to propagate the current reinforcement in columns (4 sets you need to model now + stirrups), and if propagate helps with the goal of modeling all the rebar in the structure faster.

Regarding the position of longitudinal bars it is also given by intersecting elements, or L-shaped columns, etc. You can imagine that intersecting stirrups in L column would need a longitudinal bar at their intersection, regardless of the longitudinal bar equal distribution on one of the column sides.

Regarding the aligned ffr around the rectangular section, yes, it is not taking into account anything but the distribution path, so the corner bars are not in the right place all the time.

[farzanbayat74]

@ovidiu_paunescu 

Sorry if I had misunderstanding.

[elimayro34]

Hello Autodesk Programmers. Please add this tool. Thank you.

[vcpailjames]

Autodesk is just lazy my friend.

Look at concrete cards in the "Next" tab, inside Revit Road map. Those cards have stayed in the "Next" tab during past year and they haven't moved to "In the Progress" tab. 😂

[jessi85ma_ln]

très bien 👌