The storage for repair parts and back-up case storage is integrated into the Speedi-Bilt Rivet Rack tire mezzanine. The parts shelves, on the lower level, have a drop-in particle board surface and are easily adjusted by the employees, with just a hammer, when their requirements change. No nuts and bolts are required for the rivet rack parts shelving. Wider shelf spacing allows room for a computer workstation in the rack system.