Organic Curved stair form

[taramay]

Hi!
I am trying to create a monolithic curved stair form around a irregular plan shape and need help on how to achieve it.

We want it to resemble an elegant smooth sculptural form (probably plaster) similar to that of Harry Seidlers.
http://thedesignfiles.net/2016/02/shell-house/

The problem is that it is not a properly round shape, and it is created from a series of ellipses, as you can see from the plan

I have been trying to use curviloft plugin and have not had much luck.
Ideally i would love if there was a plugin or something similar that can create a smooth spline in 3d, so i can follow the form of the stair down (cant use a helix as it does not follow a circle) and use that as a path to extrude via 'follow me'. Does anyone know of one?
Or any other suggestions?

Is there anyone who can help?? We have a deadline for tomorrow and am running out of time

Skp file

[pilou]

http://sketchucation.com/forums/viewtopic.php?f=388%26amp;t=65205 ?

You should post directly the image!

[pilou]

So use the Bezier Spline curves by Fredo as you have yet Stairs!
Just draw on it!
Should also works with only Native polylines!
Draw by parts and use Projections by Didier Bur! (last icon)for the Flat Bottom
Then Joint Push Pull by Fredo6
Here the idea that you can use with some variation depending of the position on the stair!
For the round floor, use JPP twice : Horizontal, then vertical!
(click image for see animation)

[pbacot]

I have an idea on a different approach using the curves you have already on the floor, extruding the outline up.

There's some things that have to worked out because your stair crosses above itself. You might also keep each flight and landing in a component, since that is how you created the plan in the first place.

Anyway this method would allow you to use your curves and not work along the steps. You might make them more refined, but that's another process.

Make faces and use joint push pull to raise the outline off the floor. Copy the curve up to the bottom (or top) of the first step. (work in a separate from the extrusion) Use Curvishear to raise the curve up. When you have the curve following the stairs as you want, position it for the lower edge and upper edge of baluster plus. Add it to the extrusion group. Use joint push pull. You can use JPP to create the inner baluster and the surface below, or you can work the inner baluster separately and use Curviloft to create the bottom faces.
I can't get the order of attachments right...

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[ely862me]

He knows how to create the wall/rail but what he wants is a way of making it grow smooth without the straights in the landings.

Curved stair form

Hi! I am trying to create a monolithic curved stair from around a irregular plan shape and need help on how to achieve it. We want it to resemble an elegant smooth sculptural form (probably plaster) similar to that of H…

SketchUp Community (forums.sketchup.com)

[pilou]

So as Box said and me in the second post above Bezier Curve Spline is its friend!