U stairs without landings

Hello everyone,

I’m trying to make a U shaped staircase without landings from a U shaped curve. I have troubles to manage the angles that I want to be radiant. Do you have any idea how to make it ?

Thank you for your help !
Looy

U_shaped_staircase.3dm (566.5 KB)

U_shaped_staircase.gh (9.2 KB)

Your Rhino file is empty? So no Crv param in GH file. Better to internalize it?