How do I determine the best jbeam truss structure?

I notice that the hood of BeamNG cars have a single non-colidable node in the middle to give strength to the hood nodes, but how do I set this up properly, I imagine that each beam connecting to that central node needs to be tweaked to perfection to create the realistic metal structure of a car hood but how do you devs go about tweaking it to perfection?

It looks like it requires deep understanding of materials, but for someone like me are there some basics to go by?