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Today's competitive food and produce markets require better understanding of the design of packaged, palletized products in order to minimize product damage during shipping, maintain quality, control costs, and address promotional and environmental concerns. To further define important design parameters, the effects of shipment vibration on palletized products were measured. The premise of this study was that the natural frequencies of the palletized product should be different from those of the vehicle in order to decrease resonant behavior that may lead to packaging failure. The study was conducted in two stages. First, the natural frequencies of the product itself were examined, then the natural frequencies of fully loaded truck trailers were investigated. A description of analytical and experimental methods for evaluating packaging design and suggestions for ways to avoid resonant excitation are presented.