Metal construction materials, namely, springs, spring mounts, spring hangers, seismic mounts, bracing, flex connectors, floating floors, solar panel mounts, pipes, pipe fittings, HVAC ducts, metal fasteners, namely, bolts, nails, rivets, screws, nuts, clips, washers, lock washers, straps, clamps; containers of metal for containing pressurized chemicals, gases and liquids