Black Rock Fireproof Column’s outer shells provide a clean, smooth round, square and rectangular shapes (along with customized shapes and sizes) which are ideal for window wall construction in hospitals, schools, dormitories, cafeterias, shopping centers, and other areas where exposed columns are used. Our steel strength makes Black Rock columns the premier choice for parking garages, including garage doorways with added protective options. Structural WF, pipe, and HHS squares and rectangular shapes meet ASTM standards and all outer shells are coated with standard metal primer (unless specified otherwise) prior to shipping. SP-6 sandblasting and high-performance coatings are readily available.