As a premier China double deep racking system supplier, Guangzhou Heda Shelves manufactures precision-formed, structural-grade steel systems designed to bridge the gap between pure 100% selectivity and hyper-dense cubic utilization. Browse our standard and specialized assemblies below.
Integrates double deep base bays with overhead multi-tier picking levels. Engineered for 300–1,000 kg/m² floor loads.
Back-to-back 2-deep configuration yielding up to 60% aisle consolidation. Precision 75mm pitch adjustable beam locks.
Hybrid double deep and shuttle integration rated down to -25°C. Electrostatic epoxy finish resisting freeze-thaw condensation.
Heavy-gauge Q235B upright frames with dual-depth guide rails for pantograph double-reach forklifts. 4,500 kg bay capacity.
Engineered impact-absorbing polymer buffer shields and deck liners. Eliminates point-pressure deformation on fragile bottom skids.
Universal boltless teardrop connectivity with self-locking safety pins. Fast regional installation for rapid distribution deployment.
Heavy roll-formed box beams paired with 11-fold omega upright profiles. Rigorously tested under ISO 9001 load compliance standards.
Versatile storage modules for peripheral picking bays, fulfillment order buffering, and maintenance repair operations (MRO).
Double deep pallet racking is not merely selective racking doubled up; it is an engineered compromise between spatial footprint and dynamic reach mechanics. Understanding its structural physics is paramount for warehouse safety and longevity.
Double deep configurations require pantograph-reach or telescopic-fork lift trucks. When reaching into the second pallet depth (typically 1,100mm to 1,400mm past the inner frame), the forklift's combined center of gravity shifts forward dramatically. In structural design, beams must be calculated to resist not only pure vertical dead loads but the dynamic impact oscillations induced as long-reach pantographs deposit loads at extreme elevations up to 11 meters.
Under international standards including EN 15512 and RMI MH16.1, racking beam deflection must not exceed L/200, with premium cold-storage specifications demanding L/250. HEDA box beams utilize continuous submerged arc automated seam welding and interlocking 3-, 4-, or 5-claw high-tensile connectors. This eliminates the risk of torsional rotation during asynchronous loading where the back pallet is loaded while the front position remains vacant.
Consolidating four pallet depths into a single double-sided bay run doubles the concentrated point-loading transferred into the concrete warehouse floor slab. HEDA engineers carry out Finite Element Analysis (FEA) to verify baseplate dimensions, ensuring floor pressure remains beneath the slab’s ultimate bearing capacity (typically 40 to 60 kN per footplate), while calculating chemical anchor shear resistance under Zone 3 and Zone 4 seismic acceleration profiles.
Every cubic meter of cooled air in a temperature-controlled cold room carries direct, continuous refrigeration costs. Conventional selective pallet racking leaves over 60% of warehouse floor area dedicated exclusively to empty forklift aisles. By installing double deep racking, operators immediately eliminate two out of every five service aisles.
This layout yields an instantaneous 30% to 45% increase in pallet storage density without requiring the massive capital outlay and motorized infrastructure associated with automated shuttle cars or crane-driven ASRS. For 3PL contractors and FMCG cold warehouses handling 2 to 4 pallets per SKU, double deep represents the optimal thermodynamic and capital efficiency balance.
Procurement decisions require clear visibility into volumetric efficiency, throughput cycles, and capital requirements. The following benchmark compares double deep racking against other industrial storage typologies for standard 1,200mm × 1,000mm pallet footprints.
| Racking System Type | Pallet Access Selectivity | Floor Space Utilization | Forklift Aisle Requirement | Relative CAPEX / Position | Inventory Rotation Logic |
|---|---|---|---|---|---|
| Standard Selective Racking | 100% Direct | 35% – 42% | 3,000mm – 3,400mm (Standard) | Baseline ($) | FIFO / LIFO Independent |
| Double Deep Pallet Racking | 50% Direct | 55% – 65% | 3,100mm – 3,500mm (Double-Reach) | 1.15× – 1.25× Baseline | FILO / LIFO (2 Pallets/SKU) |
| Drive-In / Drive-Through | < 15% Direct | 65% – 75% | Forklift enters rack lane | 1.35× – 1.60× Baseline | Strict LIFO / FIFO |
| Push-Back Cart Racking | Lane Face Only | 60% – 70% | 2,900mm – 3,200mm | 2.20× – 2.80× Baseline | LIFO (2–5 Pallets Deep) |
| Radio Shuttle Automation | Channel Face Only | 75% – 85% | 3,000mm (Shuttle moves in lane) | 3.20× – 4.50× Baseline | FIFO & LIFO Flexible |
| Very Narrow Aisle (VNA) | 100% Direct | 50% – 58% | 1,650mm – 1,900mm (Guided) | 1.80× – 2.40× Baseline | Full FIFO Compliance |
Founded in 2001, Guangzhou Heda Shelves Co., Ltd. operates a specialized 30,000 m² manufacturing plant with over 300 experienced engineers and technicians. With monthly production output exceeding 30,000 tons of structural racking, we manage every production phase under rigorous ISO 9001:2015 and European CE safety certification protocols.
Unlike secondary suppliers using scrap or variable-yield slit strip coils, HEDA double deep components utilize certified Q235B and Q355B structural cold-rolled steel sourced directly from tier-one Chinese mills (Baosteel, Shougang). Our profile cross-sections undergo continuous computerized monitoring to guarantee uniform thickness tolerances within ±0.05mm across all 11-fold omega upright columns.
For chemical, pharmaceutical, and high-humidity environments, we implement a comprehensive 9-stage pre-treatment wash. Automated pickling and ultrasonic phosphating eliminate all mill scale, microscopic oxides, and oil residues, followed by an electrostatic thermosetting epoxy-polyester powder coat baked at 180°C–200°C. This delivers an impermeable 70–90µm dry film thickness resistant to salt spray, caustic cleaners, and mechanical abrasion.
Industrial supply chain directors are no longer purchasing static steel racks in isolation. Future-proof double deep systems require structural agility to interface with robotics, smart sensors, and fluctuating ESG energy benchmarks.
The global shortage of certified double-reach forklift drivers is accelerating adoption of automated guided reach trucks (AGVs). Modern double deep racking now integrates ground magnetic tracks, optical retro-reflective targets on uprights, and laser deflection sensors on bottom beams, ensuring automated machines seat pallets at depth with millimeter precision.
Smart warehouses are incorporating piezoelectric strain gauges and MEMS accelerometers into critical double deep load-bearing uprights. These nodes continuously stream vibration, impact, and micro-deflection data to warehouse management systems (WMS), alerting facilities management the moment an accidental forklift mast strike exceeds yield thresholds.
International ocean freight volatility has prioritized volumetric packaging density. HEDA engineers have redesigned double deep upright bracing profiles into interlocking knockdown assemblies. This design maximizes 40HQ container cube utilization to over 92%, substantially reducing shipping freight costs per pallet position to global ports.
Energy-intensive cold stores are utilizing computational fluid dynamics (CFD) modeling on double deep bay profiles. By specifying specialized ventilated wire-mesh decking instead of solid timber or steel panels, operators enhance vertical convective airflow around dual pallets, slashing compressor power consumption by up to 22%.
From raw material buffering to regulated pharmaceutical distribution, discover how customized double deep architectures solve complex logistics bottlenecks.
In facilities operating at -18°C to -30°C, structural steel risks low-temperature brittle fracture. HEDA engineers formulate high-impact ductile Q355D steel grades treated with low-temperature impact-resistant powder polymers, preventing micro-fissuring around punch slots and connection claws.
Storing 200-liter chemical drums or IBC liquid containers creates concentrated rolling and static loads. We equip double deep bays with integrated secondary steel channel cradles, spill-retention sumps, and anti-spark galvanized grating ensuring full environmental and occupational compliance.
Auto assembly supply hubs experience severe pallet weight variation from light plastics to 2,500 kg steel engine blocks. HEDA double deep systems integrate custom-welded structural cross-ties, backstop beam fences, and aisle guide angles to protect high-tonnage storage racks against forklift mast over-travel.
Structural safety in seismic zones and high-hazard storage requires verifiable testing documentation. Guangzhou Heda Shelves Co., Ltd. holds third-party audited credentials recognized by international building regulators, consulting engineers, and underwriting bodies worldwide.
Certificate No: 2435-CPR-8605159
Audited factory production control (FPC) validating cold-formed structural steel racking tolerances, weld integrity, and cyclic deflection limits under European construction products regulations.
Certificate No: 18624Q00169R0M
Comprehensive quality management protocol covering raw material procurement traceability, continuous automated dimensional checks, and standardized structural testing through 2027.
Heavy Metal Free Coatings
Certified free from lead, mercury, cadmium, and hexavalent chromium. Ensures our powder finishes are safe for direct installation inside food manufacturing and pharmaceutical logistics centers.
CE Attestation (EN 15512)
ISO 9001:2015 Registered
RoHS Environmental Standard
Export Structural Verification
Direct answers to the critical engineering, operational, and commercial questions raised by warehouse general managers, supply chain directors, and structural consultants.
Double deep racking increases net pallet storage capacity by 30% to 45% compared to standard single-selective racking within the identical warehouse building footprint. Standard selective racking requires an operating aisle for every two rows of pallets. Double deep configurations position two rows back-to-back on either side of the aisle, effectively eliminating 50% of the aisles otherwise required for single-row access. This reduces the aisle floor area footprint from ~60% down to approximately 35%–40%, dedicating substantially more cubic volume to active storage.
Double deep racking requires either a pantograph reach truck (a scissor-mechanism reach system) or a forklift equipped with telescopic hydraulic forks. Pantograph trucks extend the fork carriage forward into the second bay depth. Forklift capacity must be derated by the equipment manufacturer; for example, a 2,000 kg rated truck may safely handle only 1,000 kg to 1,200 kg when fully extended at heights above 7.5 meters due to the shifting load center from 600mm to 1,400mm.
Double deep operates under 50% immediate pallet selectivity and functions on a Last-In, First-Out (LIFO) or FILO basis per individual storage lane. To retrieve the back pallet, the front pallet must first be removed and temporarily staged if it holds a different SKU. For this reason, double deep racking is ideal for operations storing 2 to 4 pallets per SKU, or for fast-turnover FMCG, cold chain food distribution, and batch-staged industrial products where entire production lots are moved together.
Because the forklift operator's line of sight is partially obscured when placing the rear pallet at higher elevations, HEDA strongly recommends three structural safety features: heavy-duty pallet support bars (2 to 3 per pallet position) to prevent bottom skid fracture, rear backstop beams or offset pallet safety stops to establish a positive physical stop, and structural floor guide rails or inductive wire guidance inside working aisles to minimize mast sway and eliminate rack upright collisions.
Yes, provided the structural uprights have sufficient load-bearing capacity to support the higher total tonnage. Conversion involves repositioning existing frame rows together using specialized 200mm to 300mm row spacers, adjusting beam heights, and installing pallet support bars. HEDA engineers can evaluate your current beam profile drawings and concrete slab thickness to determine if re-profiling or reinforcement is required.
To provide a fully calculated engineering design within 24 hours, our design team requires: (1) Warehouse architectural drawings (CAD or PDF) showing column grids, building perimeter, and dock locations; (2) Building clear height to the lowest overhead obstruction or sprinkler head; (3) Pallet specifications (width, depth, overall height including cargo, and maximum gross weight); (4) Model and specification sheet of your planned double-reach forklift; and (5) Specific environmental factors such as operating temperature or seismic design parameters.
All HEDA racking components pass through an automated 9-stage pre-treatment line featuring chemical pickling to remove microscopic surface scale followed by zinc-iron phosphating to seal the steel matrix. We apply electrostatic thermosetting powder coatings baked at 200°C to achieve a resilient 70–90µm surface layer. For open port sheds, fertilizer distribution sites, or severe coastal environments, we provide hot-dip galvanized steel components with coating thickness exceeding 65µm under ISO 1461 standards.
Standard manufacturing lead time is 15 to 25 business days depending on total project tonnage. We package frames, beams, and accessories using precision wooden dunnage, protective plastic wrap, and high-tensile steel strapping engineered to maximize 20GP and 40HQ container cube utilization. A standard 40HQ container typically accommodates 22 to 25 tons of racking components, lowering your landed freight cost per pallet position.
Yes. Every overseas shipment is accompanied by complete, numbered assembly drawings, 3D exploded diagrams, component cross-reference packing lists, and step-by-step video installation manuals. For major warehouse installations, HEDA can dispatch senior installation engineers on-site to direct local rigging teams, verify vertical plumb tolerances, and sign off on anchor torque validation.
HEDA double deep racking systems come with a standard 5 to 10-year structural warranty against steel fracture, weld shear, and manufacturing defects when loaded according to engineered specifications. We issue stamped load capacity plaques to be affixed to each bay aisle, specifying maximum beam pair loads and bay capacity limits in full compliance with EN 15635 and OSHA warehouse safety guidelines.
Collaborate directly with Guangzhou Heda Shelves Co., Ltd.'s structural design engineers. We will analyze your warehouse drawings, floor slab load criteria, and forklift fleet to deliver a compliant, cost-optimized CAD layout and formal bill of materials within 24 hours.