metal building materials, products, and elements, namely, access-hole covers and man-hole covers; rails and handrails; tubular handrails; stanchions; balustrade; staircases; stair treads; flooring; kickplates for flooring; fencing; barrier fences; grates and grating; and floor, wall, roof, safety, drainage, sump, trench and gully grates and grating, all of the aforementioned goods being goods made of metal