Add thickness to reference splines

Hi everyone,



I think it should be easy to add thickness to splines in dynamo by sweeping but I can’t.


I have tried thicken curve node without results.


I have tried to place circles to reference points and connect them by loft surface but i can’t set them perpendicular to the normal.


Any idea to do this in dynamo :


Here is my dynamo base :



Thanks you!

Here is an example of sweep geometry on a curve. Note, you need to have profiles in 2 or more closed pieces. Revit does use single closed loops, it needs seams.