alt Hacker NewsThey aren't; they're for aircrete.
https://www.buyrigifixonline.co.uk/rmd.pdf
> 43kgf (shear load)
That seems really low for shear. The M8 Rigifix say 245 kgf for 1mm displacement in shear.
Also I slightly misremembered the rating for pull-out - actually in 34 kgf, and they are applying a fairly generous 15% safety factor (i.e. tested ultimate strength was 224 kgf). But still, it sucks that you can't just use a normal wall plug and have to worry about this sort of thing.
Hmm that's impressive for a single plug fixing. The above for fix-v is from their load table at https://fiproductmedia.azureedge.net/media/Load%20Tables/Loa...
That's 0.43 kN which is 430N or ~43kgf. Comparing to the rigifix table they are using a heavier aircrete and a smaller safety factor, which would take fix-v up to 80kg but that's still a big difference. I wonder if there is a testing methodology difference, as usually resin fixings are considered stronger than plug fixings.