6 Metal building materials, namely, metal wall panels; non-electric cables, non-electric wires and chains, all of metal; working platforms, namely, prefabricated metal platforms, metal formwork tables, metal scaffolding platforms; space dividers of metal, namely, metal crowd control barriers, metal barriers for pedestrian traffic control, portable metal free-standing barriers, metal wall panels; metal beams; metal barriers for pedestrian traffic control; bridge units of metal, namely, prefabricated metal bridges, metal railings for bridges, prefabricated metal platforms; prefabricated bridges being structures of metal; framework of metal for building; arch frames of metal for use in construction; structural platforms in the nature of prefabricated platforms of metal; mobile partitions made of metal, namely, mobile metal guard barriers for traffic, mobile metal crowd control barriers, mobile metal barriers for pedestrian traffic control, mobile metal partitions for building; welded wire mesh; wire nets; road humps being speed bumps of metal for slowing traffic; metal speed bumps; structural joint connectors of metal; structural frames of metal for building; structural steels; platforms, prefabricated, of metal; fences and railings of metal; racking being structures of metal for supporting cables, namely, metal cable trays for supporting cables used in bridge, road, and building construction; metal holders for signboards; metal signs and signboards, non-luminous and non-mechanical, used for route showing or publicity purposes