| Selective Pallet Rack | General warehouses with many product lines, mixed pallet sizes, and frequent picking. | Approximately 500–2,500 kg per pallet position, subject to beam size, frame height, and design calculations. | Low to medium; typically uses one pallet position per depth. | Excellent; every pallet is directly accessible. | Suitable for FIFO or LIFO, depending on warehouse procedures. | Requires correctly rated frames and beams, pallet overhang control, upright protection, aisle clearance, anchoring, and clearly posted load limits. | Low | Best flexibility and easiest inventory access. |
| Double-Deep Pallet Rack | Higher-volume storage where the same product is stored in multiple pallets and moderate selectivity is acceptable. | Approximately 500–2,500 kg per pallet position. | Medium to high; two pallet positions are stored deep. | Good for the front pallet; rear pallets require reach equipment. | Generally LIFO unless dedicated operating procedures are used. | Requires reach-truck compatibility, accurate pallet placement, deeper frame design, rear-pallet visibility, and careful aisle planning. | Medium | Improves floor utilization without fully enclosed lanes. |
| Drive-In Pallet Rack | Large quantities of similar products with low SKU variety and relatively stable inventory turnover. | Approximately 500–1,500 kg per pallet position, depending on rail span and design. | High; pallets are stored several positions deep. | Limited; forklift enters the storage lane. | Primarily LIFO; drive-through versions can support FIFO. | Requires guide rails, entry protection, controlled forklift speed, lane alignment, pallet quality checks, and strict prevention of rack impacts. | Medium | High density with fewer aisles and reduced floor area. |
| Push-Back Pallet Rack | High-density storage of multiple pallets per SKU where fast individual pallet access is not essential. | Approximately 500–1,500 kg per pallet position. | High; commonly two to six pallets deep. | Good from the operating aisle, but not direct access to every pallet. | Usually LIFO. | Requires compatible pallet dimensions, correctly set carts or rollers, end stops, lane-level load control, and operator training to avoid excessive impact. | Medium | Combines high density with relatively fast loading and retrieval. |
| Pallet Flow Rack | Perishable goods, batch-controlled inventory, and operations requiring systematic FIFO rotation. | Approximately 500–1,500 kg per pallet position. | High; deep lanes reduce the number of required aisles. | Good; loading and picking sides are separated. | Excellent FIFO performance. | Requires roller selection matched to pallet type, speed controllers, lane separators, end stops, pallet inspection, and routine cleaning of moving components. | High | Reliable stock rotation and efficient order-picking flow. |
| Cantilever Rack | Long, bulky, or irregular products such as timber, pipe, metal sections, panels, and furniture components. | Approximately 250–1,500 kg per arm, depending on arm length and column design. | Medium; storage density depends on product length and arm spacing. | Good; products can be loaded from the front without vertical uprights blocking access. | FIFO or LIFO, depending on handling practice. | Requires balanced loading, arm and column capacity checks, end stops where appropriate, floor anchoring, and protection from forklift collisions. | Medium | Handles long loads more effectively than conventional pallet rack. |
| Carton Flow Rack | Manual piece-picking, order assembly, small cartons, totes, and fast-moving products. | Approximately 50–250 kg per shelf or lane, depending on configuration. | Medium to high for small-item storage. | Excellent; cartons are replenished from the rear and picked from the front. | Excellent FIFO performance. | Requires suitable roller pitch, lane dividers, ergonomic working height, replenishment access, shelf load labels, and stable support for totes or cartons. | Medium | Improves picking speed and order accuracy for small items. |
| Mobile Pallet Rack | Facilities with expensive floor space, moderate access requirements, and a need to reduce fixed aisles. | Approximately 500–2,500 kg per pallet position. | Very high; rack rows move to create a single operating aisle. | Good, but only one or a limited number of aisles may be open at a time. | FIFO or LIFO, depending on rack layout and warehouse procedures. | Requires floor load verification, rail alignment, anti-crush protection, emergency stops, access controls, seismic review where applicable, and regular maintenance of drive systems. | High | Maximizes storage capacity where floor area is costly. |
| Pallet Shuttle Rack | High-volume, high-density pallet storage with repeated movements of similar products. | Approximately 500–1,500 kg per pallet position. | Very high; deep lanes are served by powered shuttle carriers. | Good for lane-based storage; direct access varies by lane arrangement. | FIFO or LIFO, depending on lane design and shuttle operating mode. | Requires compatible pallet dimensions, shuttle charging and retrieval procedures, lane stops, sensors, remote-control safeguards, rack protection, and planned maintenance. | High | Reduces forklift travel inside deep storage lanes. |
| Mezzanine-Supported Storage Rack | Warehouses needing additional vertical storage, floor-level work areas, or multi-level carton and component storage. | Approximately 250–1,000 kg per square metre for many light- to medium-duty systems; engineering verification is required. | Very high vertical utilization, subject to building height and fire code. | Good for manual storage; access depends on stairs, lifts, conveyors, or gates. | FIFO or LIFO, depending on the handling system. | Requires structural engineering, building and floor-load checks, guardrails, toe boards, stair design, pallet gates, emergency egress, lighting, and local fire-code compliance. | High | Adds usable storage or work space without expanding the building footprint. |