Square PermaCast Columns are available in plain, recessed panel and fluted shafts. Our fluted square columns are cast fluted, resulting in a crisp, deep and architecturally correct Ionic flute. Fluted columns are available in a wide range of sizes from 6" through 16" square. The columns are a composition of cast glass-reinforced polymers with exceptional strength and durability. Priming and painting with an oil-based or latex coating is all that is necessary after installation. They exceed requirements for flame spread and smoke density nationwide.