Super Innovative Sliding Storage Racks for Slabs and Bundles with custom built racks available Rack Engineering Division’s NEW vertical Glide-Out easily and safely stores slabs of marble, stone or granite. The most expensive materials can be stored in a high-density area while being at your fingertips for viewing and showing to your clientele.   Built for slabs as large as 60 inches high and 144 inches long, up to 2000-pound capacity per shelf. Two inches shelves glide our easily and safely.