I am trying to determine the required foundation design for a business street sign. The sign is 10 feet tall and is 8X10 feet supported by 2 posts into the ground. The soil is typical for middle Georgia. The weight will be minimal. I suspect I would first need to calculate the wind load, then the foundation required to prevent it being blown over. I don't have any experience with this type of design, so PLEASE explain carefully. I am new to this site and any help would be appreciated. John