Does anyone out there know how to calculate the wind load on a wooden fence? I have used 12 foot 4 x 4 pressure treated posts set in 4 feet of concrete spaced 8 feet apart. The concrete was poured in a 12 inch in diameter concrete tube. I used a strong concrete mix in the ratio 3:2:2. I want to use the full length of the posts that project above the concrete (8 feet) to construct a solid board (1/2 inch spacing between boards) privacy fence. However, before I do decide to use the full 8 feet rather than cutting the posts to some shorter length, I would like to know what the wind load will be on such a fence. There must be some kind of formula out there somewhere to tell me how to do this. I can calculate the weight of the concrete no problem and the weight of the actual fence (dead load) is relatively easy to obtain as well. I'm not concerned that the concrete will crack or uproot(?). What I am concerned about is whether the 4 x4 's can break. I was planning on using three 2 x4 rails for each section attached to the posts with fence clips (similiar to 2 x4 joist hangers). Thanks in advance for any help you might be able to provide.