Integrate slotted style uprights and beams into your existing slotted pallet rack system. New and used slotted pallet rack features 1 1/2" slots on the outside corners of the upright with 3” centers. Beams most commonly connect to uprights with a connector clip, though some beams do not require the connector clip. We carry the brand specific, used Sturdi-Bilt pallet rack, in stock.