Balustrades, metal, plastic covered, Metal constructions for the building industry, Construction, Staircase and staircase equipment, metal, Staircases, metal, Balustrades, railings and safety guards, metal, Footbridges, metal, Staircases, external, metal, and fire escape staircases, Non-structural metal fabrications for walls and facades, Balconies and balustrades, metal, prefabricated