From: "Ron La Plante" <rlaplant(--nospam--at)degenkolb.com>
Date: Mon, 31 Jan 2000 08:26:52 -0800
The American Plywood Association has a free help line:
1-253-620-7400. I have found it very helpful.
Also, regarding # of ply's, 1/2" plywood can be purchased in 3,4, or 5 ply
layups and each has different span characteristics, however, the lower of the
three values are published in the UBC span tables.