Abstract: Systems and methods for loading and transporting freight and dunnage on railcars are disclosed. An illustrative method of loading freight onto a railcar for transport can include the steps of attaching a number of lower support members to a floor or deck of the railcar, loading a lower tier of freight components onto the lower support members, loading a number of upper support members onto the lower tier of freight components, loading an upper tier of freight components onto the upper support members and releasably fastening the lower and upper support members to the lower and upper tiers of freight components. Each of the support members can be releasably fastened to the freight components via a number of coupling members, allowing the freight components to be easily loaded onto and unloaded from the railcar.