I am planning to have a piece of granite countertop 2' x 8' outdoor like the below photo.
I could run two (2) 2x4 on the side of the 4x4 posts to make the bottom materials 7" wide. Then lay the outdoor plywood (black color ones) on top. The granite will be on top of the plywood.
(photo doesn't show the plywood)
Is this "setup" strong enough to support? The 4x4 are mounted on top of deck beam and joists. So those are OK. I am wondering if I need to do three rows of two 2x4 each (total of six 4x4) instead of using three 4x4.
Is there regulation / best practice on the two 4x4 on the side in term of how far from the granite edge? I am thinking about 3" from the edge. That leaves me 1.5" plywood overhang. And then another ~1.5" for the countertop bevel edges. So basically, I should try to get the 4x4 as close to the side edges as possible, right?