@pbacot said:

@chrisjk said:

, then extruded that line and thickened the extrusion.

How?

Peter

Yes, sorry - I got interrupted and neglected to come back and finish the post properly.

I used extrudeline.rb to extrude the curve and then JPP to thicken it.

I could probably have used follow-me with a section of the stair rail and this would be needed for a shaped banister.

(Of course, I also first scaled the image using the dimensions on the plan).