I have some 4' x 10' Red Oak Plywood (from an auction sale), furniture grade. Would it be foolish to use plywood for the main part of a dining room table, and then use solid oak such as 5/4 flat, about 4" wide flat with a 3/4" groove for the plywood, and then another 5/4" oak vertically: I found turned ballisters at a local Habitat ReStore for $25 each that I would like to use as legs. So the table (hopefully could seat 10) would be approx 4'7" wide x 10'7" long. Is a 5/4 x 10' sturdy enough to support the table with four legs, or do I need 2x4 or 2x6 to support the sides with four legs?
So my main question is: would it be foolish to use plywood for the main tabletop; finished with five coats of polyurethane?
Thanks for the advice!
Barry
--some woodworking experience, but haven't made a big table before--