Pet @ www.gymratz.co.uk wrote:

I was just browsing the same subject last night and came across the
following
http://www.domesticsoundproofing.co....ofing/rbar.htm

They admit its somewhat flexible, which isnt best. Fitting 2x2 or
preferably 2x3 just below the existing ceiling, not connected to it,
and PBing would be at least as good.

NT