On Fri, 24 Sep 2004 21:24:59 +0100, a particular chimpanzee named
"G&M" randomly hit the keyboard and
produced:

Mine wanted calculations for a 80 cm opening over a doorway (2 standard
100*65 lintels)

With point loads on them or less than three courses of masonry over
them, perhaps? Pre-stressed lintels require the composite effect of
the masonry over them to work satisfactorily. Perhaps asking for
calcs was a way of proving to someone who argues every point that they
won't work.

Or maybe you've just ****ed him off something rotten.
--
Hugo Nebula
'What you have to ask yourself is, "if no-one on the internet wants
a piece of this, just how far from the pack have you strayed?"'