In some plant, the board is handled on pallet, and a depalletizer is necessary upstream the line. The fork lift or the transpallet releases the stacks with pallet on the floor, and a conveyor equipped with pusher, pushes the stacks on the line. The wooden pallet left on the floor can be handled, by the operator or by a robotic grip hand which built a stacks of wooden pallets. There are many alternatives, for instance the same handling can be done on conveyors and using the pallet dispenser to build the stacks of wooden pallet.