A frame assembly for a container trailer includes a longitudinal component having a plurality of locating constructions. The frame assembly also includes a plurality of cross-members, each of which includes a locating construction for mating with a locating construction of the longitudinal component. The locating constructions of the cross-members and the locating constructions of the longitudinal component are located, sized and arranged so that a locating construction of each cross-member may be mated with a locating construction of the longitudinal component to position the cross-members with respect to the longitudinal component.