I make extensive use of 'Sign Board' for bee equipment.  Under normal
conditions *it will not warp.*  It is, of course, a plywood specfically made
for outdoor conditions.

Mike said "1/2" plywood is supposed to be 7/16".  Actually, I have always
understood it is supposed to be 15/32".  In my experience normal grades of
plywood vary from 13/32" to 15/32" (sometimes within a single sheet), but
'sign board' is right on at 15/32".

Lloyd

-- 
Lloyd Spear
Owner Ross Rounds, Inc.
Manufacture of equipment for round comb honey sections,
Sundance Pollen Traps, and producer of Sundance custom labels.
Contact your dealer or www.RossRounds.com

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