China Wholesale Heavy Duty Longspan Racking Supplier & Exporters

While standard pallet racking is engineered primarily for full unit-load pallet placement using counterbalanced or reach forklifts, Heavy Duty Longspan Racking is optimized for manual piece-picking, bulky non-palletized cargo, or multi-sku storage bins. Longspan systems utilize broad horizontal beams with integrated drop-in shelves (such as galvanized steel panels, wire mesh decking, or high-density particle board).

However, industrial longspan systems borrow structural roll-formed upright engineering from pallet rack designs, allowing individual shelf capacities ranging from 300 kg up to 1,500 kg per level, making it the perfect middle ground between standard commercial shelving and heavy selective pallet bays.

UDL ratings stipulate that weight must be spread evenly across the full width and depth of the beam pair, rather than concentrated on a single focal point. Allowable load capacity is determined according to RMI and FEM specifications, where maximum allowable deflection must not exceed L/200 (length divided by 200) for standard applications, or L/300 when interfacing with sensitive automated picking machinery.

When requesting quotations, always clarify your actual packaging dimensions, pallet footings, and whether dynamic impact forces from manual loading will occur, so that our engineering team can apply appropriate safety factor margins (typically 1.5 to 1.65).

Yes. One of the strongest advantages of heavy-duty longspan design is modular multi-tier adaptability. Because our upright profiles are cold-formed from high-yield structural steel coils, the lower column sections can be engineered with sufficient residual axial load capacity to support intermediate catwalk walkways, handrails, staircases, and pallet drop gates.

This allows fulfillment operators to double or triple their usable floor storage square footage inside high-cube warehouses without the enormous expense of pouring new concrete or commissioning independent structural steel mezzanine columns.

For standard temperature-controlled warehouses, our electrostatically applied thermoset epoxy-polyester powder coating provides superior scratch resistance and aesthetic longevity. However, for cold-storage environments (-25°C), outdoor staging areas, or coastal regions with high ambient salinity, we recommend either Hot-Dip Galvanizing (HDG) conforming to ASTM A123 / EN ISO 1461, or pre-galvanized zinc-coated steel coil profiles.

Galvanized steel develops a self-healing zinc carbonate patina that resists micro-corrosion and stops oxidation from propagating beneath the surface coating even if impacted by heavy material handling machinery.

To produce an optimized CAD warehouse proposal and load cert sheet, our engineering group requires:

• Building architectural drawings showing column grid locations, overhead truss clear heights, and service door locations.
• Slab specifications including concrete compressive strength (typically 20-30 MPa minimum), floor thickness, and rebar positioning.
• Cargo load definitions (length x width x height, net weight, center of gravity, and storage unit types).
• Local seismic acceleration factors (Ss, S1) or postal code to ensure appropriate anchor baseplate calculations.