Dunnage Bags
Dunnage bags are air-filled pouches that can be used to stabilize, secure and protect cargo during transportation. Dunnage bags are placed in the voids between the cargo items. Dunnage bags can be used in all modes of transportation; road, railway, ocean or air.
Originally rubber bags were used to brace pallets inside trucks. They evolved into kraft paper bags with a plastic bag interior. As metal strapping became less popular, many companies now use polyethylene or vinyl- based bags because of their low cost. It is important to match the size of the bag to the void. If this does not match, the bags will not function properly, with potential for damage to cargo and people.
Starting in the 1950s, several US railroad freight carriers started rostering boxcars equipped with load-securing devices to prevent shifting during transit. These cars were usually labeled "Damage Free" or simply "DF". The interior equipment helped to eliminate the need for customer-supplied dunnage.
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