In article , Al
wrote:

Building a couple corner computer desks for the SWMBO and I. Plans call for
MDF with laminate on both top and bottom for Tops (American Woodworker,
Oct), but I have 3/4 birch ply on hand and think it might have less sag over
time without the bottom laminate and 2 coats of finish. I've never put
laminate on the bottom of anything I've built and never had a problem, I
put several coats of finish to seal the wood.

So what I'm wondering, over time will MDF or Birch ply sag more? The only
weight on back section will be the monitor, yeah we're still with crt's.
Those lcd flat screens sure look nice, but, I was happy with my Radio Shack
Model I.

I did a few different things on this desk and will post when about finished
on abpw. If anyone else is building this desk I hope you show us what you
are doing.

Al in WA

Hi Al,

I haven't seen the plans, but from past
experience, I think that the birch ply is
a better choice. If the span is 24-30 inches,
you have nothing to worry about. If in doubt,
run a couple of strips of the ply underneath and
thn double up on the edge detail so it looks like
1.5 inches.

I still have a CRT monitor too, so don't despair.

Lou