A bit sloppy, but it's the best I could do on Microsoft Paint. We're using 4x4x10 ft posts as the corners and braces for our run, and we were planning on putting them about 3 feet deep into the ground and securing them with cement. My dad is an engineer, and he said that we need to put them 4 feet into the ground, not 3, due to the frost line-and that we'd be better off using asphalt grindings or gravel to fill in around the posts.
What has worked for you?? I figured 3 feet deep would be plenty.