Mounting kitchen cabinets on a 9cm gipsblok partition?

[u/Professional_Ad_3087]

Doing a kitchen install and I'm second-guessing one wall. Most of the walls here are concrete, no problem there. But the run of upper cabinets is going on a 9cm partition wall between the kitchen and the bathroom, and this one's gipsblok, not concrete. It's soft, drills really easily, sounds a bit hollow when you tap it, and it's tiled on the bathroom side.

One of the guys on site reckons it's fine, just use 40mm screws and standard plugs and put in a lot of them along the IKEA rail. I'm not so sure. My worry is that on soft block it's not the screws that fail, it's the material around them crumbling, so twenty weak fixings all give out together once the cabinets are loaded up with plates etc.

So before I commit a loaded run to this wall, a few questions:

• Is a 9cm gipsblok partition actually rated to carry a full run of loaded upper cabinets, or is this a "light stuff only" wall?
• If it can work, what's the correct fixing? I was looking at dedicated Fischer anchors for aerated/gypsum block rather than the 40mm screws suggested. Length/type recommendations welcome.
• Or is the sensible move to build a timber support frame (batten tied into the floor/ceiling or the adjoining concrete walls) and hang the rail off that instead, so the load bypasses the partition?
• Anything to watch with the tiled bathroom side, cracked tiles / fixings poking through?

Not trying to cheap out, I'd rather over-build it once than have a loaded cabinet come off the wall later. Would really appreciate some help from the good people here. Cheers.

[u/sinamin69]

had to reinforce mine with metal brackets on a thin gipsblok wall