spiral stair

Hello everybody,

I try to design a simple spiral stair : a central post and steps turning progressively around the post.

But after long hours I have no idea how to design the steps of the stair.

How to tell to GH that each step sould have a different angle around the central post without making a box for eah step.

If someone have an idea he will save me from this deadend

Thank you?

Attachments:

1D RAMPE BG.JPG, 59 KB

Replies to This Discussion

Permalink Reply by Chris Tietjen on January 12, 2011 at 10:45am

Maybe a start?

What are you holding in your hands in your avatar?

Chris

Attachments:

SpiralStair.ghx, 200 KB

Permalink Reply by Jonathon Broughton on January 12, 2011 at 2:26pm

armadillo?

Permalink Reply by Skkratch on January 13, 2011 at 9:07am

Thank you Chris,

the result is fully controlable, it is exactly what I need.

This picture is an Armadillo and a nice GH model to built !

Have a nice day

Paul

Permalink Reply by Danny Boyes on January 13, 2011 at 10:12am

Not realising Chris had already answered this I created something to show you, some what redundant now but here it is anyway. You can see the slight differences for yourself, and I mean slight.

Attachments:

spiralStairsDemo.ghx, 211 KB

Permalink Reply by Skkratch on January 18, 2011 at 7:30am

Thank you very much,

this tow solutions are really nice and usefull.

Have a nice day

Paul

Permalink Reply by Crispijn van Sas on January 26, 2012 at 6:56am

This script could be more useful if the minimal restictions and considerations as can you walk inbetween two steps have been scripted as well. Im adapting the script now and will let you soon know the model for a minimal stair acording to the size of the human and local restrictions by law ( variable input per country )

Good beginning btw

Permalink Reply by Bora Doker on April 3, 2017 at 3:37am

Hello,

I have an also basic question about this spiral stairs.

How can i create a spline through the midpoints of the step outer edge, just like in the image below.

I have to use it for a supportive metal plate construction instead of a core stud.

As you can see I can extract the points by dividing the curve to 2 pieces. But confused to pick a way on how to choose the midpoints with a combination of step by step. Tried to apply listing options but failed to suit a proper way for my data tree.

I used the following step for creating the stairs;

https://www.youtube.com/watch?v=DywY0NnyyaU

Thanks in advance.