19 Scaffolding, not of metal; structural parts of scaffolding, not of metal; Mobile scaffolding, not of metal; Staircases, not of metal; Ramps, not of metal; Scaffolding boards, not of metal; Scaffolding floors, not of metal; Trestle columns, not of metal; access platforms as scaffolding, not of metal; Balustrades, not of metal; prefabricated non-metal structural parts of scaffolding for erecting scaffolding, work platforms, mobile working platforms, bleachers, stages, podiums, roofs and roof structures, dismountable halls and buildings; Work platforms, bleachers, stages, podiums, not of metal; Mobile working platforms, not of metal; Roofs and roof structures, not of metal; Dismountable halls and buildings, not of metal; Traverse systems, not of metal, namely, trusses used as show and event technology, exhibition stand equipment and event decoration; protective wall elements not of metal, namely, non-metal wall panels, non-metal wall cassettes in the nature of removable wall panels, non-metal door elements in the nature of non-metal door panels and non-metal door frames to be mounted on protective walls, non-metal connection rails in the nature of guard rails, non-metal corner cassettes in the nature of removable non-metal corner fittings to be mounted in protective walls, non-metal holders for wall cassettes in the nature non-metal fittings and for affixing removable door elements and removable wall panels, non-metal gap ledgers in the nature of horizontal panels for bridging gaps between scaffolding and protective walls; Fences, not of metal; Scaffolding spindles, not of metal; Lattice girders, not of metal; Scaffold couplers, not of metal