Revit structure (Analytical model)

In this tutorial, I will talk about the analytical model in Revit structure.
For more videos:
Enroll in the Revit Structure free Course :
lacyna.com/hom...
Enroll in the Revit structure course from scratch for 20$ Only:
lacyna.com/hom...

[@arthurcoura1921]

For analytical model drawing, the GRID is a must? Or can I use model line?