We worked through several table leg design ideas and came up with a single pedestal type design using some salvaged 6 x 8's from some of the old build ings they have demo'd.
Here are pics of the first of three I will build.
The leg pedestal is tenoned into the cross member foot. The upper cross bea m is sitting in a slot in the top of the pedestal. Three long lags up into the table and 3/8" bolts through the tenon and cross member.
Everything oiled with clear exterior fence type oil.
I cheated the top of the table up to 32" which is higher than the typical 3 0" and I will lower the benches from 18" to 17" to account for the 6" thick ness of the table top to allow room for thighs when seated.