"bub" wrote in message
oups.com...

On a slightly off-topic note - how much weight would cause a problem in
a typical house? I have a vocal booth (like an oversized phone booth)
in my spare room, which weighs somewhere in the region of 320kg with
somebody standing in it. It has a large flat surface (approx. 1.6m x
1.6m), so the weight is distributed quite evenly. The ceiling hasn't
caved in yet, but is this too much?



This should answer that question for you:
http://www.diydoctor.org.uk/projects...ring_walls.htm .