Command merge topography

good afternoon how
I’m developing a routine to create topography following the bottom face of the floors, but my routine is generating 2x topographies. I would like to know how I can use the command below in my dynamo routine for revit 2020.

Hi @Tiago

Some old topics to look at:

CRIAR TOPOGRAFIA SEGUINDO O PISO.dyn (51.5 KB)
Uploading: CRIAR TOPOGRAFIA SEGUINDO O PISO.dyn…

dont work create double surface topo and not joined