Mounting heavier TV with lever arm, drywall.

Tummen86 · 17 Dec 2019 at 3:33 PM

Hello!

I am going to mount a TV that weighs 23.9 kg with a wall bracket on a wall consisting of 13 mm drywall and 45 mm studs.

The wall bracket is this one:
https://www.komplett.se/product/112...ord-och-vaggfaste/iiglo-vaggfaste-tv-tvw1442#

The lever effect is thus based on the maximum length from the wall and the depth is specified at 47 cm from the wall.

I was planning to mount this with 4 metal expanders M6 (molly). Or am I completely off track?

French screws for mounting were included, 8x90 mm. Therefore, I felt that my idea was a bit flimsy...

roli · 17 Dec 2019 at 3:41 PM

What do you mean by "expanderbult" M6? Is it like a "Molly bolt" or equivalent?

The provided mount must be attached to the wall studs for it to hold. If the mount's holes don't fit, you first need to attach a plywood board or equivalent to the wall's studs, which you then screw the mount to.

noupe · 17 Dec 2019 at 3:43 PM

Are you only going to screw into the studs? If you can make it fit with the bracket, then you're all set with a regular wood screw. Alternatively, you can attach a wooden board that you fix to the studs and paint it the color of the wall. Then you screw the bracket into this.

Patzie · 17 Dec 2019 at 3:43 PM

Expansion bolt should be used in concrete, so they probably won't be a success in drywall, I would have screwed a piece of thicker plywood, or something else, into two studs, then fasten mounts to the wooden board
Edit second on that

Tummen86 · 17 Dec 2019 at 3:46 PM

P Patzie said:
Anchor bolts should be used in concrete, so they likely won't be successful in drywall. I would probably screw a piece of thicker plywood, or another material, into two studs, then attach the mount to the wooden board.
Edit: beaten to it

Obviously wrote it wrong, corrected now.

Meant metal expander "molly".

Tummen86 · 17 Dec 2019 at 3:48 PM

N noupe said:
Are you only going to screw into the studs? If you can get it to fit with the bracket, you're good to go with regular wood screws. Alternatively, you can attach a wooden board that you secure to the studs and paint in the color of the wall. Then, you screw the bracket into this.

At first, I was thinking mollies, but now I'm doubtful that's enough?

The bracket doesn't cover the studs (cc60).

Is my only option then to install studs on the outside of the wall?

noupe · 17 Dec 2019 at 3:48 PM

T Tummen86 said:
Wrote it wrong, corrected now.

Meant metal expander "molly".

Purely statically, four Mollys can probably hold your TV, but with the movements, they will likely come loose. Not a good solution. You've got three identical answers, so you know what to do anyway

noupe · 17 Dec 2019 at 3:50 PM

T Tummen86 said:
Initially, I thought of using molly bolts, but now I'm unsure if that's sufficient?

The mount doesn't cover the studs (cc60).

Is my only option then to attach studs on the outside of the wall?

No, not studs. A thin board of something like plywood or other wood that you paint the same color as the wall. The board spans two studs and is attached with four screws. Then you attach the mount to that.

icho · 17 Dec 2019 at 3:53 PM

if you hit a stud with a wood screw, you're good to go with using metal anchors on the others.
Otherwise, I think you should cut open the drywall and place a short piece behind it, then patch and paint so it's invisible. Not put up an extra board to screw into. Maybe if you live in a worn rental, but I think you might as well do it properly since you're at it.

Tummen86 · 17 Dec 2019 at 3:53 PM

N noupe said:
No, not studs. A thin sheet of, for example, plywood or other wood that you paint the same color as the wall. The sheet goes over two studs and is attached with four screws. Then you screw the mount into it.

Studs on one side of the mount and Molly on the other? Or am I just playing with fire?

Another thought, avoid painting and mess.
A nice glue board 18 mm, do you think that holds?

Finndjävel · 17 Dec 2019 at 3:55 PM

At least two screws must be able to be attached to the stud with proper wood screws? Relying solely on a drywall might not be good, even if you use molly bolts. The mounting and the plugs will probably hold, but it might happen that the entire board breaks.

noupe · 17 Dec 2019 at 4:00 PM

T Tummen86 said:
Studs on one side of the mount and Molly on the other? Or am I just playing with fire?

Another idea, avoiding painting and mess.
A nice 18 mm laminated board, do you think it will hold?

As long as the screws attach to the board, it will work fine. Unsure of what the definition of a laminated board is?

Screw plus Molly: the screws in the stud won't come loose, so to speak, the question is more whether the drywall will get damaged over time. An alternative is to center the board over a stud with 2-3 screws if you really want to keep its size down.

davveno1 · 17 Dec 2019 at 4:03 PM

If you hit studs with one side of the bracket, it will stay in place.

Thomas59 · 17 Dec 2019 at 4:28 PM

Snap Toggle M6 plasterboard anchors support 100kg each in single plasterboard. No problem holding your TV. I've tested it myself. Also installed overhead cabinets in the laundry room with 2 Snap Toggles per cabinet in single plasterboard. Tested hanging from the fixings (over 100kg) without issues.

https://www.toggler-uk.com/toggler-snaptoggle-heavy-duty-plasterboard-fixings-bm6.html

Available in well-stocked hardware stores.

Tummen86 · 17 Dec 2019 at 4:47 PM

Thomas59 said:
Snap Toggle M6 drywall anchor supports 100kg each in single drywall. Holds without issue for your TV. I have tested it myself. Also installed overhead cabinets in the laundry room with 2 Snap Toggles per cabinet in single drywall. Tested hanging myself on the fixture (over 100kg) without any problem.

[link]

Available in well-stocked hardware stores.

Hi, I looked into these Snap Toggles since I haven’t used them before. Unfortunately, the information I found says they require 48mm of free space behind the board. That's still 3mm too much.