a series of interconnected guide rails more specifically as illustrated in fig2 the conveyors 22 and 24 each have an outer guide rail 44 and an inner guide rail 46 typically fabricated out of round steel tubing attached thereto in the preferred embodiment the auxiliary conveyor 50 is provided with guide rails 70 and 72 that are adapted to correspond with the guide rails 44 and 46 to form continuous rails for guiding the bridge conveyor 30 along the conveyors 22 50 and 24 in particular an outer guide rail 70 is rigidly attached to the side of the auxiliary conveyor 50 at an elevation that is above the outer guide rails 44 located on the conveyors 22 and 24 in addition an inner guide rail 72 is rigidly affixed to the auxiliary conveyor 50 and is adapted to substantially correspond with the inner guide rails 46 that are normally attached to conveyors 22 and 24 the inner guide rail 72 has an arcuate shape that is adapted to guide the discharge end 15 of the mobile articulated conveyor 14 in a radius that substantially corresponds with its normal turn radius in the preferred embodiment an identical pair of guide rails.