My first thought is your going to get quite a bit of expansion and
contraction with that wide of a hardwood top and I would want to have a web
frame under the center section as well as the sides that provides support
and a way to connect that allows the top move; otherwise you risk it
cracking on you. You have the back side covered but appears nothing to tie
to in the front. Either a divider in the front or a complete top web frame
would be the direction I would head in.. I would also incorporate some
cross members into the web frame for attaching the keyboard tray.

"DJ Delorie" wrote in message
...

Still working on my new desk: http://www.delorie.com/wood/desk/

Today's question is about supporting the center section of the top.
The primary support will be along the seam, held together with draw
bolts (although there's an arch across the widest part to help reduce
sagging). I want something along the seam that will align the
sections vertically as well as support the center section. My
original idea was just biscuits, but now I'm thinking floating tenons
would be better. Comments? Ideas? Suggestions?