A rack for transporting planar sheets of material includes permanent members made of a hollow tube that is perpendicularly affixed to the bed bottom at a point adjacent to one of the bed side walls. The permanent members are also affixed to the horizontal flange by a clamp. Also provided are vertical, removable members each having two vertical posts held in a parallel relationship to each other by one or more spacers affixed near a top portion. The two vertical posts are spaced far enough apart as to straddle one of the bed side walls. The two vertical posts include a shorter inboard post and a longer outboard post. The shorter inboard post fits snuggly within one of the permanent members and the longer outboard post has a foot extending outwardly and away from the vehicle at a bottom end distal from the spacers.