suspended slab?

Hello, I have just bought a 1970's property in Lalor which the ensuite is to be gutted as in pics but I have never heard about a suspended slab and i cant seem to find too much information about them.

from what I can see it appears to be layered as corrugated iron>concrete>loose sandy mortar stuff>fiberous layer>tiling

could somebody please assist me as to what these layers more accurately are.

thanks advance.

Hi abidale Welcome to the forum
It's hard to tell from that distance
But It looks like a composite (Concrete+ chicken wire + Steel formwork) suspended slab ?
It looks too thin..were the floor tiles cracking?

Tiles werent cracking but there are/ were leaks and moukd so it was all comingniut. Ill take some better pics tommorrow for better detail

Looks like simply a sand/cement screed for the tiles which could be over a fibro sheet floor or a concrete slab. Hard to tell as SBG says. Take a torch and climb under the house and you should be able to tell whether it is a timber sub-floor or suspended concrete slab. There is also the possibility that the rest of the house has timber sub-floor eg bearers on brick piers with joists and timber flooring over the top and that there is a concrete slab only under the wet areas like this bathroom and maybe the laundry.

Stewie