Thank you all for sharing your knowledge and helping people with your expertise.
In my current model, the slab/floors are cutting the beams, hence the concrete volume of the beam is reduced.
Kindly see the image which I uploaded.
Is it possible to change from "Current Situation" to "Desired Situation" for all the beams and slabs in the entire project at one go, using Dynamo.
Hint; Revit command to be used: "Join Geometry" and "Switch Join Order"