On Wed, 18 May 2005 15:42:56 +0100, in uk.d-i-y Grunff wrote:

Perry Gunn wrote:

I want these shelves to support my AV equipment and the heaviest unit
is the amplifier which comes in at about 13 kilos! So I think that I'm
going to need some pretty thick glass! My 'wets finger and holds it in
the air estimate' was to go for at least 25mm glass.

How do you figure that? Our bathroom scales have a (toughened) glass
platform 8mm thick, and a maximum capacity of 150kg.

I know that when I wanted some rectangular shelves shortened a few
years ago that they can't cut toughened glass and I thought that
thicker untoughened glass would be easier to get hold of


Does anyone know how to calculate the required thickness of glass (or
at least have some experience to provide a better guesstimate)

I think that this is the least of your worries - I'd be surprised if you
had any problems with 6mm glass. Much more of a problem is going to be
supporting the glass. How deep do you intend your battens to be? I would
think you need at least 20mm support on both sides. Are you plastering
to that depth?

I was planning to cut out some of the brick and recess the batons into
the brickwork