Bridge / Catwalk over the great room strategies

[reedie2000]

What is the best practice for creating a bridge / catwalk along a tall wall overlooking a vaulted great room?

This is a common condition in my plans but I usually get a floating rail without any floor.

 

For weeks, I've had trouble getting the bridge to generate. I have a second floor with bedrooms but I can seem to get any room definition on the floor above the great room. 

 

 

 

[GeneDavis]

Have you tried creating a room using a railing for the gallery walk?