China Best Cantilever Pallet Racking Factories & Supplier

The decision is dictated by three primary factors: uniform distributed load (UDL) per arm, impact potential from handling machinery, and total system height. If your unit load per arm exceeds 1,000 kg (e.g., solid steel round bars, heavy sheet plate packs, precast concrete beams) or your warehouse utilizes heavy counterbalanced internal-combustion forklifts with high impact risks, structural hot-rolled H-beams (Q355B / ASTM A36) are mandatory. The thicker web and flange walls provide superior plastic deformation resistance and torsional stability. Conversely, if handling lighter materials under 800 kg per arm (such as PVC conduit, aluminum extrusions, wrapped timber moldings, or furniture frames) with specialized guided reach trucks, cold roll-formed cantilever offers superior economy, lower building dead-loads, and flexible 75mm clip-in adjustment increments.

Cantilever arms act as horizontal cantilever beams fixed at one end to the upright column. According to ANSI MH16.1 (RMI) and European standard EN 15512 / FEM 10.2.02, deflection under full rated Uniformly Distributed Load (UDL) must not exceed L/180 to L/200, where L represents the clear length of the arm from the column face to the tip. More importantly, cantilever arms are fabricated with an intentional upward incline angle (typically 2.0° to 2.5° from horizontal). This built-in camber compensates for mechanical deflection under full rated load, ensuring the arm remains above the horizontal plane and preventing cargo from sliding off the front edge during loading or unloading.

Yes. This is achieved by installing transverse cantilever accessories across adjacent arm levels. The two most common configurations are heavy-duty welded steel wire mesh decking and formed steel shelf panels (smooth or perforated for fire sprinkler water penetration). Alternatively, pair of tubular or roll-formed pallet support rails can span the arms perpendicular to the aisle, providing standardized pallet nesting pockets. This hybrid versatility allows high-bay facilities to manage seasonal inventory changes without reconfiguring structural uprights.

Unlike standard selective pallet racks where vertical column loads are primarily axial compression, cantilever racks exert immense overturning moment forces at the column base plate due to the unbraced cantilevered loads. Generally, medium-duty systems require a minimum 150mm to 200mm reinforced concrete slab with a compressive strength of C25/30 (3,000–3,500 psi). Heavy-duty structural systems with arm loads above 1,500 kg or upright heights exceeding 6 meters typically mandate a minimum slab thickness of 250mm to 350mm (C30/37 or 4,000+ psi) with dual-mat steel reinforcement. Chemical anchor bolts (such as Hilti HIT-HY 200 or Fischer injection systems) are specified with embedment depths of 140mm to 220mm to prevent anchor cone pullout under dynamic wind or seismic overturning moments.

Standard electrostatic indoor powder coating is insufficient for outdoor exposure. For outdoor storage yards, port logistics, or chemical storage facilities, we perform hot-dip galvanizing according to ISO 1461 / ASTM A123. The entire fabricated steel element (uprights, arms, bases, and diagonal bracing trusses) is immersed in a molten zinc bath at approximately 450°C (842°F), creating a metallurgically bonded zinc-iron alloy coating with an average thickness of 85μm to 110μm. This delivers 25 to 50 years of maintenance-free cathodic sacrificial protection, preventing rust even if scratched by forklift tines. For mild outdoor climates, zinc-rich epoxy primers combined with architectural-grade UV-resistant polyester powder coatings offer an alternative solution.

Before shipping, our QA department issues a comprehensive Quality Verification Dossier: (1) Mill Test Certificates (EN 10204 3.1) verifying the chemical composition and yield/tensile strength of the steel coils and H-beams; (2) Automated powder coating / galvanizing thickness measurement logs and cross-hatch adhesion test results; (3) Non-Destructive Testing (NDT) reports for critical robotic welds; (4) Dimension inspection sheets recording column punch hole pitch tolerances within ±0.5mm; and (5) Complete photographic packing reports documenting steel bundle strapping, pallet dunnage, and container weight balance.