Hi
There are two ways to do that as I know:
1- To use geometry.Doesintersect node as picture below.
but just to worn you this way may take a lot of running time if model is heavy, because you are reading all the element in the model. To solve it, you can decrease the spending time on that by adding filter rule like elements per floor.
2- To use interference check inside Revit and based on the clash report your dynamo will join the only elements that cause clashes, and this way recommended for heavy model and more accurate. if you need help with this way I can help you.
Regards