Vern,
Sweet looking project.
Those work well in areas like yours with minimal height.
The place we moved to has a 14’ ceiling in the garage just past the end of the garage door tracks and I went a bit more extreme to use the height I had available.
I buried a 6x6 fence post in the side walls and built a 5 ply beam across the entire width. I’ve got a 16’ x 9’ mezzanine I have quite loaded up.
