>Considering that the plywood I had gotten at the local home improvement store
>would not lie flat <snip> The 7/16 version is stiff enough that it can support
>my heft with nary a bend on two foot center supports
> Bill Winans
> Yes, there is 5/8" plywood. But unless you want to support it every 12 inches
> or so, get 3/4" plywood. The 5/8" will sag between supports, but 3/4" will
> not unless your supports are farther apart than 17 inches
> Dick Karnes
Gents...I think the "sagging factor" is as much dependent on the quality of the
material as with the thickness of the sheet. Sheets of plywood of the same
thickness have much variation in sagging due to the number of plys, type of
wood, glue used, patched knot holes, etc. Not being a wood expert, I cannot
say which is best, but I can say that the typical Home Despot probably does not
carry the very best possible quality. Whether you need that level of quality
depends on the underneath bracing and support. But this is not the place to
"go cheap" since everything you build on top of it will either sag or hold firm
depending on what is used for a foundation. Going to a furniture grade of
plywood is as good as it gets. Good luck...Ed L.
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