Unbraced conventional pallet racks are structures intended for the storage of goods (commonly palletized); they are composed of vertical uprights, horizontal beams, and braces, connected together to form a steel skeleton-like structure. Figure 1 displays an isometric view of a pallet rack, highlighting the two directions to be considered in the structural analysis: down-aisle and cross-aisle. The lateral behavior in the cross-aisle direction depends on the shear flexibility and capacity of the upright frames, composed of uprights and braces (Figure 1); single transverse bolts are commonly used to join uprights and framing elements (braces).