The curves were lofted to form a polysurface. When lofted in Rhino it generated several open polysurfaces instead of one single surface.
A single surface was generated by lofting the surfaces in grasshopper. Then iso-curve and pipe components were used to generate this iteration.
However it didnt work too well. Back to a framework of two 3 curves and definitions using line segment and pipe components.
The number of spokes or ribs, their thickness, number and orientation are varied using sliders. The height and width of the seating is varied along the z axis.
Parametrics 