Metal building materials including; ceiling, wall, floor systems and grids, wall braces, wall system channels, building boards, wall system channels with integrated adhesive, metal wall coverings, metal cladding panels for walls, metal framing and components, building board finishing beads and sections, metal wall connectors, devices of metal for use in reinforcing walls and concrete, acoustic panels, fire rated access panels, acoustic studs, framing for walls, modular prefabricated steel framing, metal access covers, parts of prefabricated metal walling, prefabricated partition walls of metal, prefabricated wall structures of metal and fittings for the aforesaid goods