Create ground surface from curves considering the contour

Hello everyone, I am new to Dynamo Revit, I was trying to create a concrete floor on floor 1 respecting the contour of the beams and columns, that is, by panels. I have managed to extract the column and beam curves from an entire floor, but what I cannot create is a surface within these curves that surround the slab panel. I leave the dynamo file and a photo. If you could give me guidelines to proceed, I would greatly appreciate it. greetings.
crear losa.dyn (72.0 KB)

crear losa.rvt (7.3 MB)

Hi @gosthwisper not sure, is it something here you are after ?

Revit_XdYcW9h9BF

or

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hi
if you are looking for the formwork surface under the slab

cordially
christian.stan

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yeah nice :wink: and another way if that the case

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Thanks sovitek, if it is that surface that I am looking for, one that respects the contour of the columns and beams and then transforms it into a floor.
I was very grateful. Greetings and keep practicing to improve more.

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Thank you Christian.stan, for your help I will see and improve the script right now. I’ll tell you how it goes. greetings dear.

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Christian.stan
great, thank you dear. I am already understanding the functionalities of the nodes.
I am very grateful for your solution. :100: