A mobile carrier includes a generally planar cargo platform. The mobile carrier includes first and second opposed side rails, each side rail having a portion extending outwardly from the cargo platform, the opposed side rails being adjustably coupled to the cargo platform such that multiple distances between the outwardly extending portion of each side rail may be respectively maintained. The mobile carrier includes first and second opposed end rails, each end rail having a portion extending outwardly from the cargo platform, the opposed end rails being adjustably coupled to the cargo platform such that multiple distances between the outwardly extending portion of each end rail may be respectively maintained. The mobile carrier includes a rod. A receiving structure is configured to maintain the rod at multiple respective positions relative to the receiving structure, the rod and the receiving structure being separable from one another.