19 Railway sleepers, not of metal; railway sleepers of wood; synthetic materials of rigid urethane resins and glass fibers for building, construction and water treatment purposes; reinforcing materials, not of metal, for building; pressure receiving boards for prevention of earth collapse or landslide, of synthetic materials of rigid urethane resins and glass fibers; gap covers for railways of synthetic materials of rigid urethane resins and glass fibers; building timber; resin compound board for building, construction and water treatment purposes; paving blocks, not of metal; non-metal building materials, namely, plates, sheets, corrugated panels, rain gutter system in the nature of eaves and downpipes; building materials not of metal, namely, curing plates, lattices, roof crosspieces, joists; non-metallic rigid pipes for building; asphalt, pitch and bitumen; non-metallic transportable buildings; [ monuments, not of metal; building materials, namely, plastic pipes and fittings; pipes of earthenware or cement; roadmaking materials, namely, non-metal platform; chimney pots of non-metal; building materials, namely, natural and artificial stones, cement, lime, mortar, plaster and gravel, clay or cement pipes; ] products for the construction of roadways, namely, asphalt, pitch, bitumen; transportable buildings of non-metal; building plastic materials, namely, pipes, gutters, roofing tiles, roof flashing, roof trusses, door panels, fencing panels, roofing panels, ceiling panels, floor panels, wall panels; portable non-metal buildings; doors and windows in plastic materials; [ ceramic building materials in the nature of bricks and refractory blocks; linoleum building materials, namely, plates, sheets, panels, and tiles; asphalt; diving platforms not of metal; boards and powder of inorganic fiber, not of asbestos, namely, fiberboards and glass powder for building purposes; ] moldable wood for building, construction and water treatment purposes; moldings, not of metal, for building; non-metal tiles, panels, boards used for roofing and paving and for use in building roads, bridges, pergolas, balconies, and ceilings; manufactured timber; exterior wall, not of metal, for building; synthetic wooden stop logs for building, construction and water treatment purposes; plastic conduit for drainage and irrigation