stairs with seperate (concrete) flight and landing

[don-matteo]

actually I am wondering, wether it's possivle modelling stairs in archicad with a seperate stairflight as precast concrete part and a stair landing made from in-situ concrete.

We need the following result in a section view:

 

 

[Red]

I would go with a morph or a complex profile unless you need a stair object for a specific reason. I still use morphs more than not for stairs versus the stair object. It has gotten better, but not there just yet.

[4dProof]

probably best to model as separate parts. The best approach I have found with the stair is to not try to get it all done in one element.
Think about it like any other building element; you wouldn't try to model an entire elevation out of a single wall. You build it as it would be built in reality; platform framed with separations for material changes, thicknesses, finishes, insulation, etc.
The stair is no different. Just because you can model a large complex stair as a single unit, doesn't mean you should (at least not in all instances).

In this case, the BIM-ness of the model would indicate that the landing is a different thing than the stair. So the landing is modeled with slabs, beams, etc. Then the stair can be a stair for each separate string. You may need to play with the plan view setting a bit to get it to show up the way you need, but it's definitely possible.

[bouhmidage]

just uncheck this tick, to seperate stairflight and landing attributes

and theese settings for junction

final result

[bouhmidage]

set your tread thicknes to 0 

[don-matteo]

@bouhmidage that already looks great, does it work with a U-shaped stair as well? or, a stair with 3 flights and 2 landings, in order to build one stair object which includes all landings and flights which geometrically all are separated from each other (maybe with a gap of 1-1,5cm?

[bouhmidage]

It works for any stair shape, 

If you need a gap of 1 cm, then, you have to model  flights and landings seperately,