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Elliptical Stair

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If you want to model it from scratch, then I would have thought that the Helix Spiral command is the place to start. Equal Top and Bottom Radius. Ungroup it so it is just a NURBS curve. then Place it inside a group. Stretch the Group to the Elipse that you need using the Group control points, then start modelling the treads.....


I know nothing about how an eliptical staircase should be constructed, but this seems like a good place to start....

Screenshot 2023-02-19 at 17.24.53.png

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  • 1 year later...
5 hours ago, Benson Shaw said:

Not marionette, but previous thread about modeling elliptical stair might also be helpful:






Looking for something somewhat parametric at this stage though, so that I can fiddle with various options.


I've ended up using the legacy "custom stair" tool which allows a sort of ellipse made up of several curved sections joined together. Rather painful to make adjustments to but better than nothing.

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3 hours ago, line-weight said:

I've ended up using the legacy "custom stair" tool


Funny how the legacy stair tool is often the best way to tackle 'architectural' stairs with a bit more style.


This is an older but still interesting stair being 'hand drawn'  - Sorry nothing parametric about it, but once you have the 2D layout its not too much to adapt and develop to 3D 



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That's fairly much the method I've used. The limitation is that each segment has to be a whole number of treads which means that the radius can only change at points determined by whole tread-depths. This gets more problematic, the sharper the radius is. That aside though, it doesn't work too badly.

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