Strata, common property and a false ceiling

Happy said:

This might put too much pressure on the walls, but arched support before is straightened and bend the other way will take quite a load.
Idea can be run past engineer to calculate what sort of beam across the room has to be put to hold that weight.

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Bottom line with these creative ideas is you would lose to much head height and cost a fortune (not practical).

RazzaDazza, just go ahead and do it. If you start about mid-day (noise is less noticeable) and you are organised, you could probably drill all the holes in less than an hour.