Narrow-aisle high-bay racking is generally a specialized storage solution derived from heavy-duty selective racking. The rack structure is similar to standard pallet racking, requiring only the addition of floor-mounted guide rails. These rails are typically installed between rack rows using angle steel guides, or as recessed floor rails. Narrow-aisle high-bay racks generally use turret forklifts (tri-lateral forklifts) to access pallets. Forklifts do not need to turn when accessing pallets; only the forks rotate. Therefore, the reserved aisle width is generally between 1600mm and 1900mm, which is sufficient. Warehouse space utilization can reach up to 80%, and picking efficiency can be maximized. It is an ideal choice for operations pursuing FIFO (First-In, First-Out) and high storage capacity.