Wood, semi-worked; Building timber; Wood veneers; Plywood; Water-pipes, not of metal; Drain pipes, not of metal; Balustrades, not of metal; Palings, not of metal; Ducts, not of metal, for ventilating and air-conditioning installations; Balcony enclosures, not of metal; Non-metal wire fencing; Aviaries, not of metal; Scaffolding of wood; Latticework, not of metal; Scaffolding, not of metal