Attaching a ceiling track to a wood wool board

[xei]

Hello,

I'm planning to install a curtain rail on the ceiling, but I'm unsure if it's possible and how to proceed.

Most of the ceiling is concrete, but when I tap near the facade, it sounds like a lighter material.
Somewhere between gypsum and wood in sound.
I found a detail from the building permit (from 1945) that indicates a 50 mm träullsplatta (wood-wool slab) on the underside of the concrete in that area. (see attached detail)

Does anyone have experience with this?
Can I attach the curtain rail to the träullsplatta, or is there a risk that it's too porous?
If it's possible, which drill and plug are recommended to use?

Thanks in advance!

 

[Centano]

It is not possible to fasten into the träullsplattan, so you have to fasten into the concrete behind.

 

[xei]

You cannot attach to the wood wool board; instead, you have to attach to the concrete behind.

Thank you for the answer!

I checked with neighbors and the property manager, and the response was that it shouldn't be any problem to attach to the wood wool board.

In theory, it sounds strange, but I have to trust the experiences from the area.
It must be some board with relatively high density and not so porous.
We'll see if it falls down