"Lou" wrote in message
ups.com...
Does anyone have the knowledge of what the weight difference is between
1 square ft. of 3 mil. plywood and 1 square ft. of 1/2" styro core
composite?
Or maybe someone could give me the weight of the 1 square ft. of 1/2"
styro core composite?

The weight difference between Okume or Mahogany plywood and that of Finnish
Birch is significant as well.

Rich S.