Sloping with slab tool

[Anonymous]

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

[Karl Ottenstein]

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

[Foti]

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

[Anonymous]

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.

[Foti]

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?

[Anonymous]

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.

[Foti]

Thank you

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

[Richard Morrison]

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.

[Foti]

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.

[Barry Kelly]

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.