Staircases of metal; buildings, transportable, of metal; greenhouses of metal, transportable; transportable buildings of metal; pillars of metal for building; buildings materials of metal, namely, metal boards, metal panels, metal partitions, and metal fascia, metal canopies, awnings of metal, drywall corner bead of metal, stair nosing of metal and portable metal levees; framework of metal for building; roof gutters of metal; windows of metal; wall tiles of metal