Pallet rack clips for Unarco Sturdi Bilt pallet racking Supports Unarco Sturdi Bilt pallet rack beams Effectively locks beams into upright frames Replacement clips for Unarco Sturdi Bilt pallet rack The Unarco Sturdi Bilt Pallet Rack Clip may be one of the most recognizable clips in the pallet rack industry. Unarco Studri Bilt Pallet RackingIt features a simple two-prong hook design that connects the beam to the upright frame with a secure connection. Since the 1950's, UNARCO has been manufacturing pallet rack systems, starting with the Sturdi-Bilt pallet rack design. The upright frames of a Sturdi-Bilt pallet rack system are similar to standard teardrop uprights, although the frame-to-beam connection is very different.