Curved Stairs

[ahmadhamayil (ha2000)]

Hello! I’m trying to make curved stairs like the image below; however, I can’t seem to apply the contour using the contour command on Rhino. I would really love some help! I’m uploading the file.

stairs.3dm (3.9 MB)

[diff-arch]

I would use BlendSrf for something like this this.

[laurent_delrieu]

Hello
you didn’t ask for Grasshopper but if you want to make some changes it could be more simple. I don’t use blend here but just four points to make the transition curve.

curved side of stairs.gh (11.6 KB)

There could be many others way to make the transition, the 3d shape …

here using Sweep

You could also adapt the factor of transition

curved side of stairs sweep.gh (14.0 KB)