topic Re: Curved Stair issue with construction. in Modeling

Curved Stair issue with construction.

Anonymous — Thu, 25 May 2023 14:40:50 GMT

https://gyazo.com/b9010f4eb7a7a984371970579cf8ce52

This was an issue with previous stair tool and still is on current new one. Why curved stair construction(ceiling) looks so ugly from the bottom? It should be clean and smooth curve and is really tough task to make it look good on section view.

Re: Curved Stair issue with construction.

Jan Vlach — Mon, 11 Feb 2019 18:05:08 GMT

That is rather complex problem, I belive it is dificult to program archicad to generate correct geometry in every scenario. In situations as this I would use another tool (perhaps mesh or morph) to create the bottom part of the stairs and only show risers from archicad stair tool in sections and 2D. Also it is rather unfortunte that you cannot use stair in boolean operation - if you could, you would be able to easily shedule mass of the stairs.

Re: Curved Stair issue with construction.

Anonymous — Mon, 11 Feb 2019 19:00:39 GMT

Yeah, I managed to make it look acceptable using lines and fills. It's not perfect though.

Re: Curved Stair issue with construction.

Barry Kelly — Wed, 25 May 2022 06:51:45 GMT

The underside is much better with flat landings.
It is the winder treads that really messes things up.

You can split the structure of the stair - it will remain as one complete stair.
This will give you slightly better control of the underside of the stair - especially on the landings and winders.
But you still won't get a great underside.

The best solution is to model the stair in separate sections for each flight, landing and winder.
So model one stair that is full height - just to get the settings for risers and goings and number of treads.
Using these settings, model the individual parts of the stair and elevate each section to the correct height.
You can set the end connections so all the pieces join correctly.

The down side of this is it is not one complete stair, and you will have to adjust tread numbers, walking line, break line etc., for each part.
It is possible - it just takes longer.

Barry.