replying to DerbyDad03, Iggy wrote:
You'll have to visually inspect them both. Rumor has it that the Lumber Yard
still gets the furniture-grade plywood with a decent veneer thickness, I
haven't found this to be true at 2 of the Lumber Yards around me. HD's
however, is too thin to ever be refinish sanded.

Otherwise, 5/8's is definitely plenty and even too much for the carcass. 3/4
is at best only okay for the shelves, real wood planking would be a vast
improvement. But, if you choose the 3/4, then you should angle iron or
c-channel the front and back edges to avoid the inevitable future sag.

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