specs for the horizontal bar
 

Can anyone point me to the official specs for the horizontal bar attachment? Specifically, what do the fittings at each end look like where they attach to the vertical bars. Even a good close up picture of the joint at the Manchester kickoff field would help.

PLEASE don't post unless you know the real answer.

I've already seen the drawings for the low-cost bar with pipe flanges - according to what you can make out in the rendering of the arena that isn't it.

The drawings for the center structure, 1 and 2, only show the platform and the hole for the vertical bar.

If we're going to be beat up about contact with that fitting I'd like to know what it looks like so I can design a retrofit.