Round Posts
| Diameter |
Area |
%age of 4" post |
Breaking Force |
%age of 4" post |
| 2.5" |
4.91 |
39% |
238 lbs |
25% |
| 3" |
7.07 |
56% |
408 lbs |
42% |
| 3.5" |
9.62 |
77% |
650 lbs |
67% |
| 4" |
12.57 |
100% |
970 lbs |
100% |
| 5" |
19.64 |
156% |
1893 lbs |
195% |
| 6" |
28.27 |
225% |
3268 lbs |
337% |
Posts should have approximately 1/3 of their length in the ground