Setting post within concrete? how huge? how low? setting post for privacy fence in raining ohio

setting post for privacy fence in raining ohio
Answers:    30 inches deep this is to get you below the frost flash to keep posts from heaving (lifting up) and twice as wide as your post if using 4x4s eight inch hole beside it a little wider at the bottom
I set them 3 ft deep 1 ft widespread on bottom 2 ft on top make your holes as narrow and insightful as possible 8ft at least 20inch min 24 max