The Sagulator I think was a good indication. I plugged in the values for
Douglas Fir, used 600lbs load (3x the expected), load concentrated in
center (vs distributed)......and it came up with a 0.1 inch deflection. The
sag limit of L/360 is 0.11. So that sounds like it should be plenty strong
with margin.

Thanks again for the great input!



"RayV" wrote in message
oups.com...
Try one of these:

http://www.awc.org/calculators/span/...eversecalc.asp

http://www.awc.org/calculators/span/...rcalcstyle.asp

http://www.woodbin.com/calcs/sagulator.htm

If I read your post correctly you have a 2x12 being used as a shelf.
If this is correct, probably none of thes will give you what you want
to know but may point you in the right direction.