Thanks a million Jacques. I think you're spot on on the size of the columns. I think 16" will be much better. How deep, in your opinion, should the footer for the columns be? Stacking two 4x8x16 hcb was my way of making a 16" tall wall (something decent) to plaster the mfg stone to in between the columns. If the 8x8x16's are much stronger I can use that. Thanks again.
