"Jim" writes:
The modulus of elasticity would be about 2,000,000 psi. Sorry to say, my
manuals only cover hardwoods such as oak, hickory, and maple; thus I cannot
give you a better answer than this.. However, the construction of the
plywood has no influence on the modulus of elasticity. But the construction
certainly affects the moment of inertia, and therefore, the maximum stress
and the maximum deflection.
Jim

Based upon looking at some calculators and skimming the analytical
paper cited in another response, it seems like Baltic Birch plywood
would have an MOE of 1/2 to 2/3 that of the Baltic hardwood number
that you quoted.

Also, if I am understanding you correctly, then I think you are
incorrect in saying that the construction of the plywood doesn't
effect the MOE -- in fact, per the article mentioned in another
response, the transvers-oriented plys contribute only minimally to the
stiffness. So much so that when there are only a small number of plys
there is a significant difference in MOE between plywoods with the
face grains oriented parallel vs. orthogonal.