than groove 66 in the specific embodiment illustrated the ribs 58 and 62 are 1 2 34 wide rib 603 4 34 wide and grooves 64 and 66 are 5 8 34 and 21 8 34 wide respectively and each is 1 4 34 deep when the pallets 30 which like pallets 10 are non reversible are stacked one on top of the other as in fig6 the ribs and grooves on the boards urge the pallets in a precise staggered orientation and the pallets are designed to stack only top deck to bottom deck in a column in fig8 this particular stacking arrangement is suggested the lower deck 40 39 of the topmost pallet 30 39 shown registers with the upper deck 38 34 of the middle pallet 30 34 and similarly the lower deck 40 34 of that pallet registers with the upper deck 38 39 39 39 in the lowermost of the three pallets 30 39 39 39 shown it will also be noted that pallet 30 34 in the stack of fig8 has been reversed 180 u00b0 with respect to the pallet 30 39 and 30 39 39 39 in order to achieve the alternately stepped or staggered arrangement as shown in fig8 that is while the bottom boards 36 34 in pallet 30 34 are oriented so that their middle ribs 60 are closer to the left side edge of each board as shown in pallets 30 39 and 30 39 39 39 the middle ribs 60 in the board 36 39 and 36 39 39 39 respectively are closer to the right side edges of those boards consequently when the pallets are stacked in the manner suggested top pallet.