"Mike" wrote in message
...

Didn't realise you required that depth, BUT, about a thousand years ago
when
I was in Shipbuilding, the Wireless Offices were 'ringed' with a copper
strip about such dimensions, in order that all Radio equipment could be
'grounded' ie earthed. The half inch strip was taken from each piece of
Radio equipment to this massive strip. THEREFORE, this strip must still be
available :-))

I didn't suggest that it wasn't, did I? :-)

Mary