Structural engineering is my speciality but also I’m working on development Revit addins. If you are interested in RevitAPI then you are welcome on my web-site: www.bim-api.com
or YouTube Channel:
https://www.youtube.com/watch?v=7k4Hot-pPNQ&list=PLsSxuttlCdeQES4itcMl7jK4bBl6rjavo