Hi.
I have prepared a little package to assist you. One non OOTB node = If.Equal.Return.Index.Updated (one of my fav’s) This will extract element curves, create planes, find the intersects and identify what they are. Hope this helps you with your task. 
#share
Lines Tester R17.rvt (320 KB)
(D1.3) Find Intersecting Planes.dyn (19.7 KB)
