Common metals and their alloys; ores of metal; building materials of metal; building products of metal; metal structures; articles made of common metals for handling, lifting or restraining loads; articles made of common metals for transporting loads; transportable structures of metal; metal containers; materials handling bins of metal; materials handling containers of metal; containers of metal (storage, transport); containers of metal adapted to dispense their contents; containers made of metal for mounting on vehicles; metal skips; hoppers (non-mechanical) of metal; metal troughs; metal tanks (containers); crates of metal; chests of metal; hoisting apparatus (block and tackle); structures of metal for supporting purposes; support plates of metal; supporting arms of metal (fixed or articulated); frames or sub-frames of metal; frames of metal for containers; metal rails or tracks; chutes of metal (other than parts of machines); gravity conveyors (chutes) of metal