19 Reinforcing materials, not of metal, for building; huts; non-metal swimming pools; building materials, not of metal, namely soffits; folding doors, not of metal; concrete building elements namely, blocks, bricks, posts, poles, slabs, panels; framework, not of metal, for building; partitions, not of metal; non-metallic advertisement columns; transportable non-metal buildings; cornices, not of metal; angle irons, not of metal; roof coverings, not of metal; paving slabs, not of metal; staircases, not of metal; window plate glass, for building; concrete poles; palings, not of metal; signaling panels, non-luminous and non-mechanical, not of metal; building panels, not of metal; floors, not of metal; wood and concrete beams; roofing, not of metal; lattice work, not of metal; and window glass for building