Mount TV to horizontal stud - AVS Forum
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post #1 of 5 Old 03-08-2011, 09:46 PM - Thread Starter
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I'd like to mount my 40 lb TV over the mantelpiece, using a flat-plate type mount (Simplicity SXDP3). With a stud finder, I have determined that this area of the wall has studs running horizontally, rather than vertically. (There are vertical studs to either side of the fireplace, but none in between, that I can detect.)

I'm thinking of mounting the plate with the top bolted to one of the horizontal studs, and the lower part attached to the drywall with toggle bolts. Would this be reasonable?
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post #2 of 5 Old 03-09-2011, 07:13 AM
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40 lbs? Sure.


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post #3 of 5 Old 03-09-2011, 09:11 AM
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Studs are NOT horizontally mounted. What you have found is a fireblock. The 2x4 is cut to 14.5 inches and is usually just toenailed in between 2 studs. It serves to maintain the 16OC spacing, add some additional rigidity to the wall structure and serves as a fireblock.

These are in NO WAY sufficient to support a 40 TV.

Mount a piece of 3/4" plywood a minimum of 10" wide and 18" long (painted and edged) to the wall to span 2 studs using #8x2-1/2" deck screws.(minimum of 6) then fasten the TV mount to the plywood
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post #4 of 5 Old 03-09-2011, 09:17 PM - Thread Starter
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I'm not able to locate any vertical studs in the area in question --- around 7' wide from the mantelpiece up to the ceiling. Is it possible there are none? My (admittedly cheap) stud finder detects studs at 16" separation everywhere else but there. The section of wall in question has a chimney behind it, so maybe it gets enough support from that?
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post #5 of 5 Old 03-09-2011, 10:15 PM
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It is possible that the sheetrock was fastened (glued?) to furring strips that are against masonry. That will not provide a solid mount for a TV. You need to find out positively what is behind the sheetrock.

Using a horizontal 2x4 without knowing positively HOW it is secured to the studs in the wall is taking a big chance.
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