I'm about to start planning/building a "test" column that will be part of a bigger picture. Aesthetically I know what what to expect, but I'm looking for input on the structural aspect of construction. The column needs to be 10' tall. they will need to be able to support a moderate load on top (pergola). Veneer over CMU or solid masonry? I'm thinking CMU, but not sure of the type of anchor support I will have? How would you spec your footing? Is 3'X3' overkill, or should I go smaller? I would like to have 2'6" X 2'6"