I just recently completed a Unilock patio in my backyard with 3 columns constructed out of the Uni-lock Dimensional stone. At the time of the design of the patio I hadn't planned to build a pergola. Now with the columns in I decided I would like to place a 4X4 post in the center of the columns and build a triangle pergola.
My question is, does the 4x4 post have to be in a sonic tube and buried underground?? My stone column is about 40" high so my plan was to fill the center of the column with cement, set my post and start constructing the pergola
We face all 4 seasons where I live.