I am building a pole barn and would like to stack firewood between the poles under a shed roof attached to the side of the barn. These are 6" x 6" poles set about 3' in the ground. Do I need to worry about the load that my wood stacks will have on these poles? Surely the lateral loads won't be that much if I only stack 8' tall. The poles are 12' apart. If this IS a concern, what can I do to mitigate the problem? Do I need to leave a BIG space between the rows of wood or can I place the rows tightly against each other? Lastly, is there a problem if I stack directly on the gravel floor ro do I need to place something underneath the rows of wood? Thanks for your sage advice.