alloys of common metal; aluminium; construction materials of metal; building materials of metal; buildings of metal; buildings, transportable, of metal; ceilings of metal; common metals and their alloys, ores; unwrought or semi-wrought common metals; doors of metal; folding doors of metal; frames of metal for building; greenhouse frames of metal; greenhouses of metal, transportable; hinges of metal; ladders of metal; mounting frames of metal for solar panels; outdoor blinds of metal; platforms, prefabricated, of metal; poles of metal; prefabricated houses [ready-to-assemble] of metal; scaffolding of metal; signboards of metal; swing doors of metal; transportable buildings or structures of metal; casement windows of metal; window frames of metal; windows of metal