Cannot create 360° spiral staircase

[eidam655]

Hi!
I am trying to create a spiral staircase that ends on the same line as it begins (so a full 360° circle).

However, even though my Archicad draws the preview successfully, it doesn't create any geometry. 

Is there no way of doing this as one object? Does Archicad read the same start and end vertex as overlapping?

Thanks for any answers!

Operating system used: Windows 11 24H2

[runxel]

You'll probably need to fake it, being 359,99°.

[eidam655]

it's crazy to me that architecture should suffer from a software limitation

[cuba]

There are some library objects for spiral stairs..

https://bimcomponents.com/GSM/Details/16542

 

[danielk]

Yeah, this has always been a limitation: the stair tool geometry simply cannot overlap itself in plan. That is just how it was designed. 😕

But Architecture doesn't need to suffer for it, only the Architect. Here is how to do it (you practically have to use 2 stairs):
https://support.graphisoft.com/hc/en-us/articles/27687009124881-How-to-create-spiral-Stairs

But like @runxel suggested, I would also just make it 359.99 degrees. You will not see the difference really.

[jl_lt]

and boy, does he suffereth, that is, the architect 

[ryejuan]

surprisingly I thought I won't be doing any spiral staircase but to my surprise here I am and realized that the latest and greatest Archicad 29 got limitations to this compare to the staircase in lower versions that offer spiral staircase... kinda funny...

[jl_lt]

if by funny you mean your hand pressing on your forehead in disbelief to the point of stress fracture, while mechanically damaging your mouse, then yes, its very funny 

[ryejuan]

Yeah! been delaying of doing that staircase since yesterday... Now sat on it and see my options...

1. trying to resolve the issue with the new staircase (which I find it impossible to work with unless someone more knowledgeable enlighten me how it be done.)

2. model it one by one step by step which I find it more wasting time.

3. go to objects library type spiral staircase. Luckily got older versions of it that works and I end up using that one...

I just want the stair tool to do 3250 height but it won't allow me while

on the older spiral staircase which is now a library object it just simply did what I want. Save me a lot of time like less than 5mins to do vs fiddling around on the new stair tool to get what you want. Hopefully newer releases will have more simplified and intuitive way of doing things ( I doubt about that it will happen any sooner...)

[jl_lt]

been there too. the stair object in A20 worked really well for some not so complicated cases