What is the purpose of dunnage in cargo handling?

Dunnage plays an essential role in cargo handling, and in this context, it specifically refers to materials used to support, protect, or secure cargo during transport. When lumber is placed under pallets, it serves various functions, including providing a stable foundation that helps distribute the weight of the cargo evenly. This support prevents shifting during transit, which is crucial for maintaining the integrity of the cargo.

Additionally, using lumber as dunnage facilitates airflow underneath the pallets, which is particularly important for temperature-sensitive goods. This helps in reducing moisture buildup and prevents spoilage. It also aids in protecting the pallets and cargo from damage due to contact with the ground or other surfaces.

Thus, dunnage is not merely about covering or cushioning, as implied by the other options; its primary purpose is to offer structural support and stabilization for the cargo while it is being transported.