Good day, I have a doubt about building the model through sketchup and legacity Openstudio plugin, my question is, which would be the right way to put a door (according to the attached image) if there are different thickness layers on the floor?

Good day, I have a doubt about building the model through sketchup and legacity Openstudio plugin, my question is, which would be the right way to put a door (according to the attached image) if there are different thickness layers on the floor?