Each column has a steel armature inside it that is bolted to the slab/grade beam. Affectionately called ‘aliens’ for their many appendages, the armature is an awkward looking thing, until it is hidden by the stonework. The armature to the left is more involved as it has arms that extend to the outside of the column to support the gate as well as the gate operator. The armature allows us to center the gate on the column; in many cases a gate is set at the back of or behind the column as a convenience to the builder. We just thought it looked better in the center of the column. The stonework is structural, with only the steel armature- and some conduit- inside it. I think it gives a stronger, more integral look than a standy-up veneer. Almost all the material is sandstone from Tennessee, which is colorful and easy enough to square off for a clean edge.
Conduit runs through the center of each column for future lamps. Since it wasn’t in the homeowners plans as we built, we set a secondary cap on top, to cover the conduit and protect the opening from the weather. Should lamps be desired, the topmost capstones will be removed and the wiring can be installed with minimal fuss.