19 Non-metallic construction materials; wall elements, prefabricated wall elements, girders, planks, plates, framework constructions and special constructions of wood, wood beams, beams of laminated wood, framework beams of wood, wooden formwork beams; construction elements for concrete formwork, framework constructions and constructions made of wooden stanchions for formwork sheets for concrete, formwork panels not of metal; wooden scaffolding; formwork panels of wood combined with another material substituting wood, also combined with metal; formwork elements made of wood combined with another material substituting wood, also combined with metal; formwork panels made of plastic