UNEX Span-Trak Deck Track Decking converts existing single-deep pallet rack into carton flow racks in minutes. Decks install onto existing 1-1/21-5/8" step beams without any toolsa"no shelves, hangers, or supports are needed. To install, set front beam to desired elevation and rear beam at higher elevation. Track length must match upright (out-to-out) dimensions. Rollers provide superior carton flow for first-in first-out inventory control. Maintenance-free construction features galvanized steel side channels and -3/4" diameter aluminum rollers. Appropriate for lean manufacturing.