Modeling
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Wall and Slab Intersection in Section

Anonymous
Not applicable
How can I make a Wall and a Slab intersect properly in section?

I made a compposite wall and a composite slab with the same priorities and fills and I have "Enable Skin Priorities" switched on.

In the section window they intersect proprly only when the Slab touches the Wall. When the Slab touches the inner Composite's line they do not intersect at all!

Walll & Slab intersection.jpg
36 REPLIES 36
Anonymous
Not applicable
AFAIK it's still not possible to have composite floors intersect properly in ArchiCAD.

It would be a nice improvement to get easier 3D models...
I think Revit already does so
Afbeelding 2.png
Laszlo Nagy
Community Admin
Community Admin
Here is an article related to the topic found on Archicadwiki:
http://www.archicadwiki.com/TechNotes/Wall-Slab_Intersections
Loving Archicad since 1995 - Find Archicad Tips at x.com/laszlonagy
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Djordje
Virtuoso
You could also place the beam within the wall - as it really would be a beam, not necessarily a part of the slab. With the same cut fills, it would clear up?
Djordje



ArchiCAD since 4.55 ... 1995
HP Omen
Anonymous
Not applicable
Thank you for your suggestions! It is sad I already know them but don't like them! SEO is fine, but its more work! Beam is the right solution but it takes even mote time to model and I usually don't have a lot of time!
Here is a typical building detail I model (and draw!) in 90% of my projects. It is reinforced concrete structure with slabs without beams and brick walls with outside thermal insulation. All suggestions are welcomed!
Walll & Slab intersection II.jpg
Laszlo Nagy
Community Admin
Community Admin
I am struggling with the same problem. We probably have many similar structures in Hungary and Bulgaria.
I usually model only the Slab structure in the inside of the building. Then I place the rest of the floor as 2D in the Sections where they are visible.
I also model the exterior floor structures (e.g. floor structure of a balcony) using a separate Slab. I could not come up with a better solution yet.
Loving Archicad since 1995 - Find Archicad Tips at x.com/laszlonagy
AMD Ryzen9 5900X CPU, 64 GB RAM 3600 MHz, Nvidia GTX 1060 6GB, 500 GB NVMe SSD
2x28" (2560x1440), Windows 10 PRO ENG, Ac20-Ac27
Anonymous
Not applicable
Djordje wrote:
You could also place the beam within the wall - as it really would be a beam, not necessarily a part of the slab. With the same cut fills, it would clear up?
I totaly agree with Djordje. We are doing BIM or what?...
I only use this kind of detail in CD drawings...
In the concept phase I use a special template where I use generic composites for slabs, walls and roofs...
I also make the slab inside the building like Laszlonagy does, but without 2d patch in section.
So... When I need to detail the model I just detail the generic composites changing them with the attribute manager,
and then I place the beams with the thickness of the concrete slab.
For me it works like a charm.
Anonymous
Not applicable
Braza, you did not read my explanation! It is "reinforced concrete structure with slabs without beams". Perhaps there is another term for it in English but it is still the same - no visible beams, so no beams need to be drawn separately!

Laszlo, you mean that an (ex)Hungarian CAD company does not offer a way to model a typical building detail, used in Hungary?!
Perhaps, if you ask them in Hungarian they will hear you/us? 😉
I model the slab according to the outside boundary of the masonry, as shown on the plan snapshot, because this is the slab contour I send the Structural Engineer. On this slab I show all the holes for installations - electrical, water, sewage, etc., so it must be drawn correctly.
I do not use a separate slab for balconies when I have a structure without beams, because the slab and floor thickness are practically the same. I only model a separate slab when I have a structure with slabs and beams and the balcony slab is thinner than the floor slab.
Laszlo Nagy
Community Admin
Community Admin
kliment wrote:
Laszlo, you mean that an (ex)Hungarian CAD company does not offer a way to model a typical building detail, used in Hungary?!
Perhaps, if you ask them in Hungarian they will hear you/us? 😉
Yes, I told them. They know about it.
You know it is this kind of game: we users tell them things we need, and they will need to consider when and how to implement them, and set priorities of which features they believe are the most important. Of course, this is many time does not agree with what we think is important.
Loving Archicad since 1995 - Find Archicad Tips at x.com/laszlonagy
AMD Ryzen9 5900X CPU, 64 GB RAM 3600 MHz, Nvidia GTX 1060 6GB, 500 GB NVMe SSD
2x28" (2560x1440), Windows 10 PRO ENG, Ac20-Ac27
Anonymous
Not applicable
I'm not sure if this is what you mean.... please see attached
Is this junction OK? If not please tell me whats wrong