that's a cool rack.
But as an aside (has really nothing to do with the rack) my gym stores bars this way,
hanging from the sleeve collar vertically . . .but near the platforms.
Funniest thing, they have the Cheap 32mm bar with the huge Hex/allen bolt in the end.
So basically, every time a bar-bell was dropped, the Allen bolt would turn just a little bit.
The threads being pulled "down hill" by the weight of the bar. . . coupled with the vibrations.
I was using the adjacent platform, and then the bar came crashing down, like a ghost did it.
Big glass window right there . . .up on the 2nd story too. They're lucky nothing serious happens.
The sleeve was still hanging there, balancing ontop of the hook/rack.
It took a while for everybody to figure what happened.
No one uses those bars, because they're crap, so must've been hanging there for quite a while.
Most likely, the bar was put up there with the bolt loose I'm sure . . . but it backed ALL the way out.
As I said above, I'm not poo-poo-ing on your rack . . .
that scenario can only happen with those shitty bars + commercial gym (high volume of dropped deads and cleans, etc)
Was just funny.