A system is provided for maintaining a minimum separation between a first pallet positioned on a first rack and a second pallet positioned on a second rack. The system comprises a double back stop that includes a first back stop attached to the first rack to prevent lateral movement of the first pallet beyond the first back stop. The double back stop also includes a second back stop attached to the second rack to prevent lateral movement of the second pallet beyond the second back stop. A minimum distance is maintained between the first and second backstops such that the minimum separation is maintained. The double back stop also includes a middle section to connect the first back stop to the second back stop. Methods are also provided for forming the double back stop and for maintaining the minimum separation between the first pallet and the second pallet.