I'm planning on building a covered patio about 8' x 8', 6' high. I'm thinking of 4 posts encased with concrete to a depth of 4'. Is that deep enough? How much concrete should surround each post? Do I need more than 4 posts? I'm in central California (no snow, hot in summer 95-105 degrees, temps usually drop to 40's in the winter), in case you guys need that info to help me. Under the patio I'll be laying bricks or paver stones. As for coverage, I'm thinking a lattice initially, then I'll probably lay some aluminum or plastic cover on top of the lattice. Purpose of this structure is to give some of my potted plants shelter from the elements. If you guys have any links/info/photos/drawings I'd really appreciate it. My handyman ability is average (have done mostly everything around the house and on cars), just nothing this large.