19 Reinforcing materials not of metal for building purposes; non-metallic rigid and flexible tubes for building; transportable buildings, not of metal; concrete walls for building; refractory shapes, not of metal; frameworks not of metal for building; non-metal architectural mouldings and finish trim; wall linings, not of metal, for building; beams, not of metal; non-metal concrete reinforcement products, namely, spacers; door casings, not of metal for concrete construction, namely, casings, casing elements, casing pipes of plastic materials and cardboard; door casings, not of metal for concrete construction; nonmetallic construction materials, namely, auxiliary building materials for reinforced concrete and masonry construction, namely, spacers, distance pieces for reinforcements, connecting pieces, namely, adapter sleeves for structural sleeves and connecting sleeves for crimp pins or keyed joints of structural steels, air space anchors, wall cramps for facades and for insulating material; wooden scantlings, namely, small timbers used in carpentry construction; non-metal roofing; non-metallic drainage pipes; non-metal cornices; gratings, not of metal; non-metal building arbors; wall panels not of metal; construction elements not made of metal, namely, supports; non-metal wall-mounted panel units for partitioning; staircases, not of metal; stair treads, not of metal; ceiling panels, not of metal; concrete building materials, namely, prefabricated concrete parts for erecting building works; non-metal gates, doors and windows; non-metal roofing; prefabricated building elements for erecting buildings and building structures of concrete, steel-reinforced concrete and prestressed concrete, namely, bridges and building supports, wall, facade and roof elements, columns and pillars, basins, floats, pontoons, prefabricated houses and prefabricated garages; concrete building materials for cable conduits and heating ducts, namely, moulded blocks for cable conduits, heating ducts and cable pits; building materials, namely, pre-cast concrete wall forms for use in urban civil engineering; concrete building materials, namely, railway ties, masts and poles of steel-reinforced concrete and prestressed concrete; non-metallic reinforcements for concrete and wood building construction, namely, plates, rods and bars used for reinforcement connections, cantilever plate joining elements, stair joint elements, expansion joint elements and reinforcement cages; reinforcement nets, namely, agricultural nets for erosion control; reinforcement mats, namely, erosion control mats; prefabricated non-metal buildings; prefabricated non-metal structures with flexible covers for agricultural, commercial or industrial storage; reinforcing materials not of metal for building purposes, namely, punched sheer reinforcements and reinforcing elements of fiber composite material for concrete; reinforcing materials not of metal for building purposes, namely, tension elements of fiber composite material for ground and rock anchors; non-metallic post-tensioning construction components, namely, anchors, nuts, sleeves, washers made of plastic material; asphalt, pitch, and bitumen; bitumen for building purposes, mortar and asphalt felt for building, concrete building blocks; concrete, cement, mortar; sand, gravel, ready-mixed concrete; non-metal construction materials, namely, xylolith; bituminous coating composition for roofs; clay roofing tiles; sandstone for building purposes, marble, natural stones; non-metal tiles; building glass; window glass; building glass; insulation glass for building purposes; window glass not for use as vehicle windows; non-metal pipe fittings, namely, end caps for pipes