OEM/ODM Longspan Racking Manufacturer & Exporters

While selective pallet racking is engineered primarily for direct forklift access carrying heavy unitized pallet loads (typically 1,000 kg to over 4,000 kg per level), longspan shelving is optimized for medium-to-heavy manual loading, carton storage, split-case picking, and irregular bulk items (typically 300 kg to 1,000 kg per level). Longspan utilizes specialized step beams or z-beams designed to carry drop-in steel panels, wire mesh decks, or timber shelves flush with the top beam flange, providing a continuous flat bearing plane. Both systems share heavy-duty cold-formed upright profiles and boltless hook-in connector geometries, allowing seamless combination in multi-tier picking architectures.

Load calculation is not a simple theoretical calculation of steel yield point; it factors in beam span deflection limits, beam-end connector moment-rotation stiffness, and global frame buckling stability. Under European standard EN 15512 and American RMI MH16.1 specifications, beam deflection under design load must strictly not exceed L/200 (1/200th of clear horizontal span length). Upright frames are calculated using second-order non-linear elastoplastic analysis incorporating floor anchor shear resistance, upright baseplate rotational spring stiffness, and operational load safety factors ($γ_F = 1.4$ to $1.5$). Every custom OEM configuration is validated via physical laboratory destructive testing to substantiate finite element modeling.

Yes. As an authentic manufacturer operating 35,000+ m² of automated production, our OEM/ODM service includes custom upright profiling (depths from 400 mm to 1,500 mm; continuous heights up to 12 meters), beam lengths customized to the exact millimeter, and customized steel deck thicknesses (0.6 mm to 1.5 mm with formed underside stiffener ribs). Additionally, our automated dual-booth electrostatic powder coating lines provide full corporate color customization according to RAL color swatches, along with laser-engraved buyer logos, customized capacity load rating plaques, and barcode location label bracket provisions.

For sub-zero cold chain facilities (down to -24°C / -11°F) and uncontrolled coastal distribution hubs, standard commercial paint systems are vulnerable to flaking and rapid oxidation. We supply two specialized finishing methodologies: First, hot-dip pre-galvanized structural steel (strip steel processed according to EN 10346 with zinc coating weight up to Z275 g/m²), which provides sacrificial galvanic rust immunity. Second, a heavy-duty cold-temperature modified epoxy-polyester powder coat formulated with plasticizers that prevent micro-cracking and brittleness caused by thermal shock contraction during room-to-freezer transitions.

Steel storage equipment is heavy and bulky; freight charges can represent 15% to 30% of total delivered project cost if packing is poorly managed. Our logistics department utilizes automated 3D parametric container stuffing software. Upright frames can be shipped knocked-down (uprights and diagonal/horizontal bracings bundled compactly in high-density nested cubes) for local bolt-together assembly, or pre-welded if ocean volume allows. Beams are stacked in interlocking wood-dunnaged steel bundles banded with high-tensile steel strapping. This engineering packaging routinely achieves container payload utilization exceeding 25 to 27 metric tons per 40ft High Cube container, reducing ocean freight cost per kilogram by up to 38%.

In seismic regions (such as the US West Coast under ASCE 7/IBC, Japan, Chile, or Southern Europe under Eurocode 8), longspan and pallet racking must function as an engineered structural system. Key design criteria include enlarged seismic anchor baseplates with multi-hole chemical or wedge anchor bolting, higher steel grade alloys with guaranteed elongation properties (S355JR / Q355B with $A_5 ≥ 20\%$), spine back-bracing vertical trusses, and heavy-duty frame-to-floor anchor engineering. Our in-house technical team provides stamped structural calculation reports detailing modal spectrum response, dead load dynamic distribution, and base shear parameters for municipal building permit approval.

Under fire safety codes such as NFPA 13 (Standard for the Installation of Sprinkler Systems), solid continuous shelves (such as solid timber or unperforated steel sheets) wider than 20 sq ft (1.9 m²) can act as umbrella shields, preventing overhead fire sprinkler water from reaching lower storage levels. For racks exceeding these boundaries, warehouse designers must either incorporate in-rack sprinkler lines or utilize permeable decking. We manufacture drop-in galvanized wire mesh decks with open waterfall channels and perforated steel shelves with 50%+ certified open surface ratios, permitting uninhibited water penetration and ventilation while fully supporting loose cartons.

All our heavy-duty and longspan racking structures carry a 5-year comprehensive manufacturer quality warranty against material defects, weld fractures, and premature coating failure. In alignment with EN 15635 (Steel static storage systems – Application and maintenance of storage equipment), we recommend establishing a tiered inspection regimen: weekly visual inspections by warehouse safety personnel, monthly documented safety log reviews, and an annual thorough technical audit conducted by a qualified rack inspector. We maintain permanent digital records of every production run through Traceability 4.0, enabling exact replacement matching of damaged uprights or beam components decades after commissioning.