mounting lcd with only one metal stud...

[boaby]

Well thanks to static i've just found out my studs are metal instead of wood, id like to run one more thing by you guys.

Above is a mockup in illustrator of my plans to mount an lcd on the wall, the dashed outlines indicate where the studs are. An important point here is that to get the tv centred horizontally on the wall, only one stud is available. To utilise the second stud to the left would have the tv off-centre which isn't what im after

Above is a pic of the wall plate which should hopefully make my question clear. Given the weight of tv&mount is around 25kgs, do you guys think 2-in-the-stud-on-the-right and 4-dry-wall-anchors will be sufficient, or am i taking too much of a risk?

any advice appreciated.

 

[Static]

Ok one Hilti light anchor HLD can hold about 8kg in gypsum panels for example.
http://www.hilti.co.uk/holuk/modules/prcat/prca_navigation.jsp?OID=-19863&fview=1
Meaning at bear minimum you should use 3 of these with appropriate screws and washers etc. Personally i would put in as many as possible, so maybe aim for about 10 fixings into the board and a couple of self tapping metal screws into the metal stud. Unsure the HLD anchors are at least 90mm apart.

 

[Richard C]

I don’t know the pull out strength of drywall fixings but, personally I wouldn’t chance it; even if they were strong enough, I would think there is a risk that the side of the wall board that’s unsupported may even start to bow outwards under the weight!

3 months ago I mounted a 42 inch plasma (don’t know the weight but its heavy!) onto a conservatory wall. It’s the original outside wall & I used 12mm plasterboard with a skim coat over 30mm battens & hid all the service cabling in ducts, terminating in outlets behind the screen. Where the screen is mounted I screwed a large piece of 30mm plywood to the wall between 2 vertical battens using 6 off 100mm x no12 screws so this would support the wall board flush with the battens. The screen bracket fixings (8 off) go through the wall board & the plywood backing board, into the brickwork behind.

If I was doing it, I think I would cut a way a section of the wall board behind the screen so I could get something a little more substantial to fix to behind there, refix the board, tape & skim over the join.

 

[boaby]

cheers for the replies guys. that sounds like a heavy-duty install richard, guessing that plasma is as good as part of the wall! on the note taping and skimming - how hard/time consuming is that ?

i was planning on redecorating sometime, maybe i should play it safe and wait till then which would be a good time to strengthen the target wall.

 

[Richard C]

cheers for the replies guys. that sounds like a heavy-duty install richard, guessing that plasma is as good as part of the wall! on the note taping and skimming - how hard/time consuming is that ?

I actually used the wall bracket manufacturers recommended number of fixing plugs but with longer screws to go through that extra 45mm. I admit that 8 is probably OTT but its only holes & considering what the plasma cost me (it's not at the budget end of the market), it's really not worth the risk!

Re taping & skimming; with all the plastering work I'm having to do on our property renovation, I’m getting rather experienced now but it's probably not as difficult & time consuming as you would think to cut out a piece of wall board & put it back. Do it carefully & you could probably use the same piece of board & just skim over the joints; you just have to be brave & have a go!