metallic building materials, namely, metal building panels, metal roofing, metal decking boards, metal ceiling panels, metal door and window frames and casings, metal boards for flooring, metal beams, girders and joists, metal sheets and plates; metallic materials for civil engineering, drainage, erosion, soil control and landscaping purposes, namely, metal panels, metal beams, girders and joists, metal sheets and plates; structural materials made from metal, namely, frameworks of metal for b...