Alright, I need a sanity check here. I've been tasked with mounting a 64" plasma TV with an articulating mount onto a metal stud wall in the corporate boardroom. It's the quadruple-threat with no room for error.
The TV weighs 85lbs dead load. The mount, another 26lbs, allows it to be swiveled and repositioned up to about a foot from the wall. This allows it to be angled instead of hung like a picture frame.
I've done extensive research on TV mounting the last couple of days, and purchased some 3/4" plywood to anchor across 3 studs with 12 1/4" toggle bolts (4 per stud) and #14 screws to mount the TV bracket to the plywood. I've noticed a dearth of information on spec sheets when it comes to toggle bolt ratings on metal studs -- only drywall and masonry is provided. I don't know if this suggests that metal studs are a no-no or if they're some sort of in-between, though people seem to do it with success in mounting their big TVs.
The studding is 2.5" wide and 16" on centre. It's in a tower so it's not load bearing.
The plywood backing I got is 38x24 centered on the middle stud.
My concern is that the cantilevering action will cause the stud wall to fail and I don't want to be responsible for a Career Limiting Move™. Are my concerns justified?
If my concerns are justified can you suggest an method to effectively hang this?