Awnings and canopies, metal, Metal constructions for the building industry, Construction, Balustrades, metal, plastic covered, Shutters, blinds, awnings and curtains, metal, Staircase and staircase equipment, metal, Girders and beams, metal, H shaped, Balustrades, railings and safety guards, metal, Staircases, external, metal, and fire escape staircases, Scaffolding, metal, tubular