topic Re: stairs with seperate (concrete) flight and landing in Modeling

stairs with seperate (concrete) flight and landing

don-matteo — Thu, 30 Nov 2023 15:15:14 GMT

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:

Re: stairs with seperate (concrete) flight and landing

Red — Thu, 30 Nov 2023 17:05:55 GMT

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.

Re: stairs with seperate (concrete) flight and landing

Patrick M — Thu, 30 Nov 2023 17:42:20 GMT

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.

Re: stairs with seperate (concrete) flight and landing

Ahmed_K — Thu, 30 Nov 2023 18:34:28 GMT

just uncheck this tick, to seperate stairflight and landing attributes

and theese settings for junction

final result

Re: stairs with seperate (concrete) flight and landing

Ahmed_K — Thu, 30 Nov 2023 18:36:52 GMT

set your tread thicknes to 0

Re: stairs with seperate (concrete) flight and landing

don-matteo — Fri, 01 Dec 2023 08:45:42 GMT

@Ahmed_K 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?

Re: stairs with seperate (concrete) flight and landing

Ahmed_K — Fri, 01 Dec 2023 09:06:43 GMT

It works for any stair shape,

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