You can imagine what 130lbs of cantilevered $3000 Panasonic 58" Plasma load could do to a brick fireplace if not attached properly.
Here I took two sheets of ¾” plywood and joined them as one using 100% coverage glue and pneumatic driven staples.
I then used 4 original (old Vizio 50" plasma) and 4 additional new 3/8” concrete anchors.
To attach the articulating mount to the plywood I used 12 flat head machine bolts, bolted through the 1 ½ inches of plywood, all with oversized washers.
I’m a slim and trim 240lbs of pure love machine, I hung off of it and got a slight groan from the wood but other than that I’m good with the mount and especially the value from Monoprice. The mount is rated at 175lbs.
I added the plywood instead of mounting directly to the brick in an attempt to share the torque loading and then in the event of a partial anchor failure the remaining anchors should assist in arresting any further movement. All this is good as long as the brick wall doesn’t pop out. If it falls, I’m going to a 19” desktop unit.