a guide arrangement for a conveyor track includes a guide bar portion arranged along at least a part of each side edge of a plate device forming the center part of the conveyor track , each guide bar portion being of an inverted generally l - shaped configuration for engaging over a corresponding edge portion of an article such as a freight container to be conveyed therealong . a plurality of rollers are provided in respective openings in the plate device adjacent the guide bar portions , to support the article above the plate device . each roller has an enlarged portion at its outward end for guiding the edge of the article to be conveyed , thereby to hold it at a spacing from the respectively associated guide bar portion .