Abstract: A tractor-trailer combination carries cargo holders which extend across the cargo compartment of the trailer, bearing at their ends against the trailer side walls to thereby confine cargo when the compartment is less than fully filled. When not in use, the cargo holders are stored in a rack which may be attached to the back of the tractor cab or to the underside of the trailer bed. The rack includes a pair of spaced apart carrier bars having notches which receive the cargo holders and retaining arms which close the ends of the notches in the bars and retain the holders in those notches.