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-   -   Question about mounting a LCD TV mount (http://www.diychatroom.com/f101/question-about-mounting-lcd-tv-mount-100253/)

pdp76 04-01-2011 02:28 PM

Question about mounting a LCD TV mount
 
I have a LCD TV that is 36lbs. With the mount, I'd say the total weight would be about 50lbs. It is a swivel arm (pan and tilt) type of arm with a pretty narrow mounting base meant to be mounted on a single wall stud.

Unfortunately, the location I want to mount it does not have a stud behind the drywall, so as a workaround, I wanted to screw in a small piece of wood against the outside of the drywall that would span between two adjacent studs, giving me a solid surface to mount the LCD arm in the exact location I want.

My question is, how thick should this piece of wood be and what type of wood would be good? Or any better overall ideas?

CplDevilDog 04-01-2011 03:58 PM

The manufacturer of the mount often has recommendations in the lit regarding the situation. Check online.

If none available, I would go with a piece of 1x pine. Use at least 2.25" cabinet screws (assuming 1/2" drywall) through to the studs. I would go one screw about every 3" in each stud, maybe 3 per side. Don't put them so close together that you risk splitting the 2x4.

I would hang gym weights on the mount up to 45lbs before setting the TV.

pdp76 04-01-2011 05:09 PM

No, the manufacturer didn't have any information on this in their lit, but I figure my workaround is a pretty common one people use, considering the small piece of wood will be hidden behind the TV. Even so, I might paint it white anyway just to make it that much more stealth.

Well, thanks for the quick and straight to the point answer, I appreciate it! Off to buy a 1x pine board I go!

<*(((>< 04-01-2011 05:14 PM

How many holes are in the frame mount for the TV? If the TV and mount really only weights 50 lbs. then I would get several good size Toggle bolts (aka moly bolts) and secure it that way. Even in 1/2" drywall you don't even need that big of moly's to secure 50 lbs. I believe 1/8" moly's are rated at 50 lbs. in drywall. I would upsize them to maybe 1/4" and use 4 or so.

50 lbs is not that much to support and toggles do a good job.

pdp76 04-01-2011 05:27 PM

Quote:

Originally Posted by <*(((>< (Post 621447)
How many holes are in the frame mount for the TV? If the TV and mount really only weights 50 lbs. then I would get several good size Toggle bolts (aka moly bolts) and secure it that way. Even in 1/2" drywall you don't even need that big of moly's to secure 50 lbs. I believe 1/8" moly's are rated at 50 lbs. in drywall. I would upsize them to maybe 1/4" and use 4 or so.

50 lbs is not that much to support and toggles do a good job.

There are only 3 holes in the mount, two within an inch of each other and the third about 2.5 inches away... so I don't think drywall mounting is feasable. Plus, the other side of the wall is a bathtub, and if the wall ever got any moisture damage, the drywall would crumble just like that so I decided against it. Thanks for the tip though!

pete0403 04-03-2011 04:31 AM

Quote:

Originally Posted by <*(((>< (Post 621447)
How many holes are in the frame mount for the TV? If the TV and mount really only weights 50 lbs. then I would get several good size Toggle bolts (aka moly bolts) and secure it that way. Even in 1/2" drywall you don't even need that big of moly's to secure 50 lbs. I believe 1/8" moly's are rated at 50 lbs. in drywall. I would upsize them to maybe 1/4" and use 4 or so.

50 lbs is not that much to support and toggles do a good job.

This is not such a good idea, having installed these for Best Buy for awhile, i know that the only real secure way is to go into wood...please never use the drywall to support any mount for over the size of a computer monitor.

While the toggle bolts may be rated to hold 50 Lbs, you have to think about the torque lever effect of the TV on the mount (especially this swing arm type) as well as the owner possibly moving the TV around sometimes. This could cause failure over time and I wouldn't want to risk having my TV fall off the wall.

CplDevilDog 04-03-2011 06:05 AM

Have to agree on that. I think anytime you are dealing with any hollow wall anchor, the working strength is assuming that the load is directly parallel to the surface (i.e. Picture frame). Once you throw that levering action in, watch your toes!

Willie T 04-03-2011 07:34 AM

Agreed. Stay away from ANY hollow wall fasteners!

They are perhaps OK for towel bar hangers and picture frames... sometimes shelving units that will hold little weight, but that's about it.


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