Railing on Topography

Have you ever experienced to create a railing at a topography in Revit?

Dealing withTopography in Dynamo

Topography geometry is different from most of others in Revit. It is not a surface or solid but Mesh. That's why it behaves a bit weird in Revit.(eg. Can't attach AC families at)

It's better to be converted to make use of it in Dynamo.

It's more like imitating than converting. Gather information from topo mesh, and create a Polysurface which has the same shape from it.