COLLAPSIBLE METAL SCAFFOLDING AND COMPONENTS THEREOF, NAMELY STEEL PLATFORMS, STEEL CHAINS, FASTENING CLIPS, RAILS, RAIL TRACKS, PLATFORMS, NON-ELECTRIC CABLES, PIPES, ANGLE IRONS, BARS, BRACKETS, FLANGES, POSTS AND RINGS OF METAL, BOLTS, RIVETS, CHAIN CLIPS, PLATE FASTENERS, LADDERS, STAIRCASES, HOOKS, HINGES, GUARD RAILS, GIRDERS, AND MANHOLES