Tips on plugs for fire double plasterboard

[putte22]

Hello.
I'm going to help a friend assemble a vertical wall bed in a couple of weeks. The kind you attach to the wall and pull down when it's time to sleep. I don't have much info, but I know it's 15mm fireproof plasterboard doubled, so the wall is 30mm thick. Naturally, you can't find any studs, or they don't fit sideways. As far as I know, Molly bolts don't exist for 30mm thickness? Would Thorsman Duomax work, perhaps?

 

[kenneth5828]

Metal expander, available in single, double, and sometimes triple.

 

[tergo]

M5 handles 30 mm
https://www.google.com/search?q=mol...oKHfzYAo0Q_h0wA3oECA4QCg#imgrc=8CWawldB7_zTWM

 

[putte22]

Yes, look, you learn something all the time. I didn't know that Molly could handle different spans. I thought single, double, triple were fixed measurements.

 

[Thomas59]

Molly plugs should be avoided as much as possible, for all kinds of reasons. If you need a fastener that can handle varying wall thickness and withstands significantly higher loads than Molly, you should use togglers (there are several different manufacturers).

http://www.imexab.se/toggler_plugg_skruv.html

 

[putte22]

I'm not a huge fan of Molly either. Maybe the Max duo is a better option then. Absolutely, toggler and Hilti are equivalent, but it feels like a slightly excessive option!! And it feels a bit off to buy a whole box just to use 4 of them.

 

[putte22]

Found some info online regarding fastening, and it seems like we need to rethink and try to find studs anyway. A model of the bed, which I suspect it is, involves screwing angle irons on top of the cabinet and into the wall. Seems like it will put a considerable amount of stress on the wall. If they are loose angles, as I didn't think, we should probably be able to get two or three of them into the studs. If we can find the studs, that is. I've tried searching with a detector on another occasion, but since it's 30mm gypsum, I suspect the detector doesn’t reach that depth. Guess I'll have to perforate the wall with screws before finding the first stud.

 

[witten]

Then there is the possibility of installing new studs on the wall that you screw into the bottom plate and top plate. Not so pretty maybe, but a solution if the studs are positioned incorrectly today.

 

[putte22]

I think it's a big no no to have visible studs on the wall. I don't know if there are detectors that can take 30mm gypsum to find the studs. And if they are "regular" angle irons, they should be movable sideways on the cabinet to fit the studs. My friend can't pick it up until three/four weeks from now, so it's just speculation about the installation, but as usual, it'll probably be a panic to mount it right away.

 

[Stickan56]

[image] Hi there.
I am going to help a friend install a standing wall bed in a couple of weeks. The kind that you screw into the wall and fold down when it's time to sleep. I don't have much info, but I know it's 15mm fire-rated gypsum double, so the wall is 30mm thick. Obviously, you can't find any studs, or they don't align sideways. As far as I know, Molly bolts for 30mm thickness don't exist, right? Would something like Thorsman duomax work?

Here's another one
https://www.essve.com/globalassets/import-resources/875654.pdf

Stickan

 

[maxad]

Molly plug should be avoided for all possible reasons. If you need a fastening that can handle varying wall thickness and much higher loads than Molly, you should use togglers (there are several different manufacturers).

[link]

Hi,
I'm quite new to drywall since we've lived in a lightweight concrete house for half of our lives.
I was going to hang a painting weighing 6-7kg so I got a recommendation for Acrobat (molly?) at the store.

Tried to install it last night which went okay after a bit of fiddling, initially the plug spun around instead of staying fixed when tightening the screw, but I had to loosen it to hang the painting and then it was loose again, until it almost burrowed into the wall and then it was tight.
Still didn't dare to hang the painting on it after reading your post so I'm curious about why or if it was only concerning TS's purpose?

 

[Thomas59]

Hello,
I'm quite new to plaster walls since we've lived in lightweight concrete houses half our lives.
I was going to hang up a picture weighing 6-7kg, so I got a recommendation for an Acrobat (molly?) at the store.

I tried to put it up last night which went okay after a bit of fiddling, first the plug spun to stay tight when I tightened the screw, but I needed to loosen it to be able to hang the picture and then it was loose again until it almost dug into the wall and then it held tightly.
I still didn't dare to hang the picture on it after I read your post, so curious about why or if it was only for the OP's purpose?

Welcome to the curse of the Molly plug. If you're okay with a big ugly hole in the plaster wall, then it's arguably okay in certain cases (but for hanging pictures it's directly unsuitable), but you should use the special pliers that are available to fold out the "wings" of the plug. It can also be done without pliers if you're experienced. Otherwise, as in your case, the plug spins and makes an ugly hole.

As you've already noted, the function of the Molly plug relies on the plug's screw being tightened. If you loosen the screw, there's basically nothing holding/stabilizing the plug. My advice in your case, since you've already made an ugly hole, is to find a small hook/picture hook that you can screw in with the Molly plug you already have.

Otherwise, there are special picture hooks for plaster walls that can easily handle 6-7 kg. For example this one: https://www.clasohlson.com/se/Gipsk...xMGbITM9rCCgzH9-jxqEofoGikXz_BIgaAr1DEALw_wcB

from Clas. It can handle 25kg and does minimal damage to the wall.

 

[Matti_75]

Hello,
I'm quite new to drywall as we've lived in a lightweight concrete house for half of my life.
Wanted to hang a painting weighing 6-7kg and got a recommendation for Acrobat (molly)?) at the store.

Tried to put it up last night which went okay after some fiddling, initially the plug spun until it was fastened when tightening the screw. However, I had to release it to hang the painting and then it was loose again until it almost ate into the wall which made it secure tightly.
I still didn't dare hang the painting on it after reading your post, so I'm curious about why or if it only applied to TS's purpose?

For such a light mounting, I would go for Hw pro instead.

 

[Thomas59]

For such light mounting, I would go for Hw pro instead.
[image]

Sure. It easily handles the load from a painting, but it's simpler to just buy a small hook and fasten it with the molly already in the wall. The advantage of the picture hook from Classe is that it can be mounted without tools, makes a minimal hole (just over 1mm) in the wall, and is easy to remove without damaging the wall.

 

[maxad]

Welcome to the curse of the Molly plug. If one is okay with a big ugly hole in the drywall, it can be somewhat acceptable in certain cases (but for picture hanging, it is directly unsuitable), but then you should use the special tool available to expand the plug's "wings." It can also be done without the tool if you are experienced. Otherwise, it ends up like in your case, where the plug spins and creates an ugly hole.

As you have already noted, the functionality of the Molly plug depends on the screw being tightened. If the screw is loosened, there is essentially nothing holding/stabilizing the plug. My advice in your case, since you already have a big hole, is to find a small hook/picture hook that you can fasten with the Molly plug you already have.

Otherwise, there are special picture hooks for drywall, which can easily handle 6-7 kg. For example, this one: [link]

from Classe. It can handle 25kg and causes minimal damage to the wall.

Thanks for the tip, it certainly looked easier to handle.

This is how the plug looks today, I noticed it's not even fixed and you can pull out the plug to what I assume are the wings that have opened.
Used a special tool to get the wings out. Should I even dare to hang the painting on it?