Modeling
About Archicad's design tools, element connections, modeling concepts, etc.

stairs with seperate (concrete) flight and landing

don-matteo
Participant

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:

 

stair.jpg

 

stairdetailed.jpg

6 REPLIES 6
Red
Advocate

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.

Thanks,
Red
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4dProof
Advisor

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.

BIM solutions and trouble shooting (self proclaimed) expert. Using Archicad 26 5002 US on Mac OS 11.5.2
bouhmidage
Advisor

just uncheck this tick, to seperate stairflight and landing attributes

bouhmidage_0-1701369065601.png

and theese settings for junction

bouhmidage_2-1701369220096.png

 

 

 

 

final result

bouhmidage_1-1701369191356.png

 

AMD Ryzen 9 3900X, 32 GB RAM, RTX 3080 10 GB
Archicad 25
Windows 10 professional
https://www.behance.net/Nuance-Architects
bouhmidage
Advisor

set your tread thicknes to 0 

bouhmidage_3-1701369378515.png

 

AMD Ryzen 9 3900X, 32 GB RAM, RTX 3080 10 GB
Archicad 25
Windows 10 professional
https://www.behance.net/Nuance-Architects

@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
Advisor

It works for any stair shape, 

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

AMD Ryzen 9 3900X, 32 GB RAM, RTX 3080 10 GB
Archicad 25
Windows 10 professional
https://www.behance.net/Nuance-Architects

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