Structural steel as perforated plates and perforated sheets; structural steel as perforated plates and perforated sheets for walls, wall claddings, facades, facade claddings, fences, partitions, window coverings in the nature of outdoor blinds of steel, roof coverings, floors, roofs, ceiling panels, shelf brackets, grilles, windows and doors as well as building cladding, and building joint connectors, all the aforesaid goods made of steel; plated structural steel as perforated plates and perf...