If you ever need the “top” area of a ramp then you are in luck. This blog post will show you how to do it using Dynamobim. Note that you are not able to extract the area from a ramp using just Revit… especially if the ramp is curved….
Its easy and it only takes 4 nodes.
Follow the steps below in the image to get the top area of a Ramp element in Revit.