On Tue, 16 Nov 2010 12:38:10 +0000 Stephen wrote :
I have used ikea cupboards in the past that used these dowel screws
but only to hold the top on. the shelves were supported by metal
"tabs" pushed into holes in the side.

Yes, Billy bookcases have the shelves supported on studs pressed into
holes in the bookcase sides. You can buy extra shelves if you need
them and they come with support studs.

--
Tony Bryer, Greentram: 'Software to build on' Melbourne, Australia
www.superbeam.co.uk www.eurobeam.co.uk www.greentram.com