Curved Stairs

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)

1 Like

I would use BlendSrf for something like this this.

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 (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 (14.0 KB)