I plan to attach some studs to a concrete ceiling and I'm a bit unsure about which fastener would be best.

Previously, I have used concrete screws for walls, but the forces are a bit different when hanging in the screw's direction.

I can't find any information about the axial load capacities of these two fasteners.
Does anyone have an idea about this?
 
Thank you for the quick and good response MaxPax!

I had apparently confused spikexpander with expanderspik :o

It was expanderspik I meant in my question actually, but the first link answered it. Apparently, the expanderspik can handle only a tenth as much as the concrete screw, which makes sense.

The reason for my question is that I had never seen expanderspik before, but it said it was intended for attaching spikläkt for ceiling panels.

/P
 
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