Space Saver industrial grade boltless shelving utilizes low profile beams to provide more storage space between shelves. Double Rivet Beams at top and bottom of unit form a rigid structure on our boltless shelving. Choose between standard duty 450 lb. shelf capacity units or heavy duty 600 lb. shelf capacity units. Space Saver boltless shelving units are priced based on 6', 7' or 8' unit height and 4, 5 or 6 shelf units. The 450 lb. shelf capacity units utilize 1/2" particle board decking while the 600 lb. shelf capacity units include 3/4" particle board decking.