A system, method, and apparatus for palletizing cargo on a rack for shipment are provided. The system generally includes a tiered rack having a base tier, a support framework extending from the base tier, and a second tier adjustably attached to the support framework. The system may further include a plurality of lower frame support members positioned longitudinally across the bottom of the base tier, and a plurality of pneumatically actuated rollers spaced to cooperatively engage the plurality of lower frame support members, the rollers being selectively extendable from a plurality of raised tracks positioned longitudinally along a floor of the railcar, where the rollers are configured to pneumatically extend past an upper surface of the track when actuated and allow for linear motion thereover.