Construction, Ceilings, ceiling slats and ceiling panels, metal, Metal constructions for the building industry, Non-structural metal fabrications for ceilings, Roofing, wood, Timber, wooden products, machinery and equipment for the woodworking industry, Roofing elements, wood and metal, prefabricated, Roof decking, composite wood and plywood, Woodwork, structural, Building elements and sections, wooden, prefabricated