6 Metal construction products; Metal decking; steel decking; Decking boards of metal; Metal decking boards; Decking of metal; joists of iron or steel; metal nuts; metal washers; metal cell closures; metal butt strips; zee closures; metal finish strips; metal pour stops; metal girder fillers; metal reveal lok hangers; fasteners, namely, screws; Steel frames for building; Steels in the form of sheets, plates, foils and reels