Abstract: Apparatus for moving a plurality of pallets loaded with building block and being supported in a vertical stack in parallel relation to one another. Uncured molded block is supported on pallets which are serially advanced on a conveyor toward an unloader. Pallets are arranged in a vertical stack for engagement with an unloader spade assembly having a plurality of laterally extending spades one above the other. The spades are constructed to support and lift the pallets when each is positioned under a corresponding pallet and the spade assembly is shifted upwardly. A transfer carriage is mounted on a track above the spade assembly for lateral shifting movement with the spade assembly being suspended therefrom. A pivot shaft is mounted on the transfer carriage for pivoting about a vertical axis and includes a driving end connected to the spade assembly for pivoting the spade assembly about the axis. Rollers are mounted on the transfer carriage.