Stair under side

Hello everyone, i’m new with rhino3D


Stair.3dm (3.8 MB)

I’m trying to model a stair and i have difficulities in making the under side. I have lined op the curve, but dont know how to close it with a surface. Do anyone have an idea how to close it?

Thank you for reading this

If the curves represent a closed, non-planar boundary, you should be able to create a surface with Patch.

Hello- I think I might try a loft and then offset (OffsetSrf) the result:

On that corner piece it might take a little more doing, I’ll have a look.
Stair_Maybe.3dm (899.5 KB)
image

-Pascal

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