Abstract: This invention relates to an apparatus for racking sheet materials characterized by an open-sided generally box-like rack having opposed sets of horizontally-disposed guiderails arranged in stacked relation one above the other to define tray tracks along the inside of the front and rear walls thereof. Slat-bottomed double-ended trays are mounted on the tracks for independent movement from a retracted position essentially centered within the rack to either one of two extended positions overhanging a side of the latter. Tray transfer means are provided for each tray accessible in the center of one end of the rack operative upon actuation, to drive a particular tray in either direction between its retracted and extended positions. A tool carriage is mounted on vertically-disposed tracks on the end of the rack with access to the tray transfer means for movement therealong into alignment with any of the tray transfer means.