Thanks for your reply. Although I think the single 4 x 4 post in concrete will be enough, I was planning on tying that post to the adjacent post which is about 6 feet away with a treated 2 x 4. I was thinking on attaching the 2 x 4 about 1 foot above the ground on the adjacent post, and attaching the other end, about 1 foot from the top of the supporting host. I was thinking that would help spread the weight of the gate over to posts. I am actually looking forward to this project. I love to weld.
