Thin wall that can support Elfa system?

[carlpett]

I have torn down an old wardrobe to replace it with a new wall-mounted Elfa system (the model with rails that hang from) in the hallway. During the demolition, it turned out that the wardrobe also acted as a partition wall against the kitchen... On the back of the wardrobe, they had simply placed a plasterboard and called it done.

Now I need to put up a new wall between the kitchen and the hallway. The problem is that there isn't much space to do this. I have measured a bit and concluded that I can have a maximum of 55 mm thick wall between the rooms to fit both the wardrobe interior and the fridge/freezer on the other side of the wall. So, it won't be possible to build a normal wall "by the book" with studs and panels on both sides.

The option I am leaning towards right now is to install a sturdy L-profile in aluminum on the floor and ceiling and then have a solid MDF panel (about 35 mm) attached to the profiles. However, I am unsure how much weight the MDF can support hanging this way. The entire interior, plus items placed on the shelves, are likely to be quite heavy, perhaps a few hundred kilograms?

Will it work? Is there any other good way to put up such a thin wall that can still handle the weight?

 

[pelpet]

I would think that a screwed and glued sandwich of two 13 OSB or plywood boards with 28x70 in between works excellently. It should be stiff and good. Alternatively, you replace 28x70 with 22mm floor chipboard.

 

[carlpett]

Hello,
Thanks for the suggestion! A few questions Do you mean board/rule/board, or? Then I don't quite understand how that fits with "sandwich"? But if that's what you meant, how does the durability between the rules turn out? If one were to just take two construction plywoods of 13 mm and glue them together, i.e., without the rule, how does that affect the strength?

 

[pelpet]

I meant board-board-board.

I would think that two OSB glued together would work too, but chipboard in the middle is better. OSB is flexible and can bend. If you glue two OSB, it will likely become much less flexible. It could probably work well with two OSB in terms of strength, but there might be a risk of bending. A chipboard is essentially rigid, so I think OSB-chipboard-OSB should be completely rigid and also have very high strength. Just floor chipboard on its own is stable enough for floors that can take quite a high point load without flexing.

The metal profiles that you screw up should also counteract bending.

 

[Göran.W]

Common 13 mm plasterboard can withstand 25 kg per fastening point, so you don't need overkill materials for it to hold. Common 45x45 studs cc 30 and 9 mm plasterboard will hold if you screw the Elfa tracks into the studs.

 

[thomas33]

These wall-mounted ELFA brackets hang from the metal strip that is screwed up near the ceiling. Therefore, the load on the wall should be minimal. Instead, it is the attachment points for the ceiling strip that must withstand the weight that will be on the shelves, and there should be a construction that supports this.

 

[pelpet]

Regular 13 mm gypsum board can withstand about 25 kg per attachment point, so you don't need any overkill material for it to hold. Standard 45x45 studs at 30 cm centers and 9 mm gypsum board will suffice if you screw the Elfa tracks into the studs.

If you want to be on the safe side, you could choose a 170x45 stud that the track hangs from. That should be enough to support several hundred kilos.

 

[Göran.W]

The question is where a few hundred kilos are.
A track of 120 cm with 5 screws in a 45x45 regel holds well over 100 kg.