topic Re: Sloping with slab tool in Modeling

Sloping with slab tool

Anonymous — Thu, 25 May 2023 15:44:50 GMT

Hi,

I fairly new to archicad and i have a question about the slab tool.

I have a round wall and i would like to make a slab from one side at the bottom to the other side on the top. How do i do this??

So from the one red cross to the other red cross. So it's sloping. The slab also has to be round.

help please

Re: Sloping with slab tool

Karl Ottenstein — Wed, 30 Mar 2011 23:11:46 GMT

Use the Roof Tool.

Being new, you'll learn that the names of the tools do not limit what you make with them. The slab tool only makes flat slabs. The roof tool makes angled slabs, with custom edge angles. So, the roof tool makes sloping floor slabs for drainage, e.g., garages, roofs that drain to central scuppers, etc.

In the example that you show, the easiest way to get the 'roof' to fit is to create it in 3D, where you'll be asked to pick 3 points to define the plane.

Cheers,
Karl

Re: Sloping with slab tool

Foti — Wed, 05 Apr 2017 19:14:08 GMT

Hello

New to this program, but this sloping slab : http://helpcenter.graphisoft.com/tips/archicad/modelling/how-to-create-a-flat-top-roof/

makes no sense to me. In the roof tool, the pitch will not go negative.

Been trying and searching for 4 days now, any help?

Thanks

Re: Sloping with slab tool

Anonymous — Wed, 05 Apr 2017 21:04:12 GMT

Hi, why are you replying to a 6 year old post?

The article you linked is from 2011, it might not be accurate 6 years later. You could try to create the roof in different portions, one piece at a time.

There might be a better method, like using a morph and then assigning it the role of a roof or something else, but this could work.

Re: Sloping with slab tool

Foti — Wed, 05 Apr 2017 21:15:13 GMT

It was the only thing I found after my days of frustration, so I replied hoping I would get a response, and thank you for responding.

So if I understand that correctly, I would have to use 6 different roof, slope each one so they align and meet where I need them?

Re: Sloping with slab tool

Anonymous — Wed, 05 Apr 2017 21:29:54 GMT

As I said, it's an option, I am not sure if it's the best or correct way to do it, there might be a way to get the slope to go negative, but the few minutes of testing I did seemed to confirm what you said. And by the way if it's a rectangle you only need 4 roofs.

If the elements of the structure aren't too many I'd go with the morph tool to get better control over everything.

Re: Sloping with slab tool

Foti — Wed, 05 Apr 2017 21:43:59 GMT

Thank you

I haven't played with the morph tool yet, will give that a try.

Re: Sloping with slab tool

Richard Morrison — Wed, 05 Apr 2017 22:37:41 GMT

Or if you are looking for a composite structure, the shell tool might be the best tool. This is something that needs to be decided on a case-by-case basis. If you have a drawing or sketch of what you are trying to accomplish, you will get better advice. You've got roofs, morphs, meshes, shells, slabs, complex profiles (beams and walls), each of which can create a roof depending on the situation, and they each come with their pros and cons.

Re: Sloping with slab tool

Foti — Thu, 06 Apr 2017 00:34:31 GMT

Hi Richard
Thank you for te extra tips wil look into all of them, just got frustrated because I'm coming from that other Bim software and I have to get my head if that procedure as something so simple as a slab on grade with drain slopes take 3 mouse cliques. Just a huge learning curve for me, but will get there. I switched because I saw the light.

Re: Sloping with slab tool

Barry Kelly — Thu, 06 Apr 2017 00:58:11 GMT

It is true a multi-plane roof can not have a negative slope.
However you can split that multi-plane roof into single roof planes and you will be able to set a negative value.

The Helpcentre article you link to was written before the multi-plane roof tool was available.

Barry.

Re: Sloping with slab tool

Laszlo Nagy — Thu, 06 Apr 2017 11:21:22 GMT

FFFFF wrote:
Hi Richard
Thank you for te extra tips wil look into all of them, just got frustrated because I'm coming from that other Bim software and I have to get my head if that procedure as something so simple as a slab on grade with drain slopes take 3 mouse cliques. Just a huge learning curve for me, but will get there. I switched because I saw the light.

Yes, you are right, Revit does this specific task better. Unfortunately, ARCHICAD currently does not have a simple way of achieving this result.
You should make a wish, so we can vote on it, support it, then send it to GRAPHISOFT.