Here is how I did it to hang a NEC CRT PJ using unistrut.
First I attached strut to the joists.
Then I ran treaded rod down:
Then the blue board went up (a type of sheetrock) with the strut put through - they did the RSIC same day, so I don't have any shots of the RSIC overlapping the strut, I picked a narrower strut to make sure RSIC-01 would clear it:
Close up (I later caulked the hole tighter):
Then the plaster was finished:
Then I trimmed the roads to the length needed, built more strut on the other side. Big mistake, I lined my downroads up with the mount position complicated my lateral movement. Space wider whan the PJ.
Then I realized I was off center and built this complicated apprattaus to give me flexibility on all three axises:
Check to see if level:
and then talk nice forum members into helping with the heave/setup.
Kal has some nice stuff on unistrut mounting at Curt's site. www.curtpalme.com