In high-density modern supply chains, Longspan Shelving Racks represent the critical bridge between lightweight boltless shelving and heavy-duty selective pallet racks. Engineered specifically for manual carton picking, intermediate bulky loads, and multi-tier mezzanine picking environments, our longspan systems eliminate center columns to maximize uninterrupted horizontal storage space.
Fabricated entirely in-house at our Ajman Free Zone facility in the UAE, Signature Racking Systems engineers custom longspan systems tailored to exact structural load ratings (from 300 kg to over 1,200 kg per shelf level, UDL). With cold roll-formed upright frames, stepped load beams, and precision drop-in steel or wire mesh decking, we provide global procurement directors, warehouse planners, and regional logistics facilities with end-to-end design, fabrication, and structural integrity certified under international standards.
Choosing the correct profile geometry, upright gauge, and shelf infill is paramount to warehouse safety and operational picking speed. Below is our engineering selection breakdown across four core configurations.
Designed with 55x47mm roll-formed uprights and 50x30mm step beams. Ideal for e-commerce fulfilment, retail backrooms, and automotive spare-parts distribution. Compatible with chipboard or flush galvanized steel deck panels.
Engineered with 80x60mm high-yield steel frames and double-stepped box beams with integrated bottom retainers. Equipped with ribbed GI decking panels designed to prevent heavy industrial component deflection under concentrated point loads.
Leverages full vertical building height (up to 9 meters). Upright columns act as structural building blocks supporting high-load walkway corridors, safety handrails, and pallet drop gates without requiring primary structural I-beam columns.
Utilizes precision butterfly or trapezoidal punch patterns along the 50mm pitch. Allows completely tool-less shelf reconfiguration within minutes as SKU dimensions fluctuate. Ideal for 3PL facilities with fast-changing inventories.
| Component Parameter | Standard Specification | Heavy-Duty Specification | Engineering Compliance Note |
|---|---|---|---|
| Upright Post Profile | 55 mm x 47 mm x 1.5 mm cold-rolled steel | 80 mm x 60 mm x 2.0 mm structural Q235B/S355 | EN 15512 axial compression tested with footplate anchoring |
| Beam Cross-Section | 50 mm x 30 mm Step Beam (1.5 mm thickness) | 60 mm x 40 mm to 80 mm x 50 mm Box Step Beam | Vertical deflection restricted strictly to ≤ L/200 under max UDL |
| Clear Span Widths | 1,000 mm / 1,200 mm / 1,500 mm / 1,800 mm | 2,000 mm / 2,200 mm / 2,400 mm / 2,700 mm | Custom lengths manufactured via in-house CNC roll-forming lines |
| Bay Depth Options | 400 mm / 500 mm / 600 mm | 800 mm / 900 mm / 1,000 mm / 1,200 mm | Allows back-to-back configuration joined by row spacers |
| Decking Surface Types | Pre-galvanized ribbed steel panels (0.7 mm – 1.0 mm) | Electrowelded wire mesh decks / 18 mm MDF / GI Gratings | Wire mesh satisfies NFPA 13 sprinkler water penetration requirements |
| Surface Finish & Coating | 180°C Electrostatic thermoset epoxy-polyester powder | Hot-dip galvanized (HDG) or zinc plated for extreme damp | Corrosion resistance verified via standard salt-spray protocols |
Global procurement heads are navigating rising freight rates, tightened sustainability mandates, and aggressive order fulfilment targets. Here are the macro procurement trends reshaping how longspan storage systems are sourced internationally.
Modern B2B enterprise procurement teams are prioritizing supplier Environmental Product Declarations (EPDs). Sourcing is shifting away from heavy, over-engineered hot-rolled profiles toward high-yield, cold-formed structural steel alloys (such as S350GD and S420MC). By leveraging higher yield strength, roll-forming lines produce thinner-walled profiles that achieve identical load-bearing capacity with 18% to 24% less total steel weight. This directly lowers raw material procurement costs and reduces ocean freight shipping emissions.
Longspan shelving is no longer viewed as purely static warehouse furniture. International 3PL and omni-channel fulfilment centers increasingly require wide-span bays designed to operate seamlessly alongside Autonomous Mobile Robots (AMRs) and automated sorting bots. Modern procurement specifications dictate base clearance heights suitable for robotic drive-units, zero bolt-head projections on aisle uprights to avoid optical sensor interference, and flush deck dividers for bin-location automation.
Disruptions in global ocean shipping lanes and unpredictable container transit times have led multinational corporations to pivot toward agile, regional manufacturing hubs. Direct fabrication out of the UAE (Ajman Free Zone) offers strategic transit access connecting the Middle East, East Africa, South Asia, and European ports within 10 to 18 days. Working directly with an integrated fabricator eliminates middleman markups, gives procurement managers real-time factory floor visibility, and slashes lead times from months down to weeks.
Longspan shelving engineering is evolving beyond simple beam-to-column interlocking. Discover the latest metallurgical, mechanical, and safety innovations driving modern warehouse designs.
Engineers utilize high-precision 3D FEA stress simulations to model torsional buckling and shear deflection on beam-to-upright connection claws. This ensures structural safety under asymmetrical hand-loading conditions prior to roll-forming.
Modern wide-span beams feature 3-claw and 4-claw cold-stamped connectors engineered with an engineered taper angle. The heavier the payload placed upon the shelf, the tighter the connector wedges into the upright pitch, preventing beam dislodgement.
Advanced upright profiles are stamped with dual-gauge steel thickness along critical lower axes. This permits direct vertical field splicing, allowing warehouse managers to convert single-level longspan shelving into a two-tier or three-tier catwalk system without structural demolition.
Prior to powder coating, components undergo automated multi-stage degreasing and zirconium nanocoating. This green chemical treatment delivers superior paint adhesion, scratch resistance against picking crates, and over 500 hours of salt spray endurance.
Signature Racking Systems F.Z.C is an established manufacturer based in Ajman Free Zone, UAE, with over two decades of engineering excellence. We control the complete value chain from raw coil intake to on-site testing.
Our veteran structural engineers have completed hundreds of successful logistics projects across the GCC, Africa, and international markets.
Equipped with specialized CNC cutting, automated upright punching lines, roll-forming mills, CO2 robotic welding, and automated powder coating ovens.
From CAD layout design and structural load calculation to overseas container flat-pack export and trained professional on-site installation teams.
Every longspan beam, upright post, and decking panel is manufactured under strict ISO quality management protocols for guaranteed dimensional tolerance.
Direct technical answers to the most common engineering and sourcing questions submitted by warehouse operations and international procurement leaders.
While pallet racking is engineered for forklift-placed unit loads weighing 1,000 kg to over 4,000 kg per pallet, Longspan Shelving Racks are built specifically for hand-loaded inventory, cartons, tote boxes, and unconventionally shaped items. Longspan uses lighter cold-formed upright profiles and recessed stepped beams that hold flush drop-in panels (such as galvanized steel decks or wire grids). This creates wide, continuous shelf openings (up to 2,700 mm) without center front posts, providing pickers with unobstructed manual access at human ergonomic heights.
UDL assumes that the total weight of the goods is distributed evenly across the horizontal surface of the shelf rather than concentrated at a single point or along the front beam. Under international standards (including EN 15512 and FEM 10.2.06), the maximum allowable deflection of a horizontal beam under full UDL must not exceed L/200 (where L is the clear length between upright frames). For example, a 2,400 mm beam subjected to an 800 kg design load will have a maximum center deflection of no more than 12 mm under full test load, returning to zero permanent deflection upon unloading.
The optimal decking depends on your storage environment, cargo, and fire code requirements:
Yes, provided the upright frames are specified with appropriate structural compressive capacity during the initial design phase. By engineering base uprights with heavier gauge steel (typically 2.0 mm thickness) and anchoring base plates directly into the reinforced concrete slab, the same uprights can be extended vertically to support intermediate floor joists, staircases, and heavy-duty walkway grating. This enables expanding facilities to double their picking surface without leasing additional warehouse space.
To produce an exact load-engineered quotation and 2D/3D CAD layout, our design team requires: (1) Warehouse architectural drawings showing clear ceiling heights and column positions, (2) Overall product/carton dimensions (Length x Width x Height) and individual piece weights, (3) Required load capacity per shelf level (e.g., 500 kg UDL), (4) Number of storage levels per bay, (5) Aisle width constraints based on your manual hand-trolley or order-picker fleet, and (6) Destination sea port for knock-down export freight calculations.
All longspan racking components manufactured at our Ajman Free Zone factory are knock-down packaged for optimal sea freight utilization in 20-foot GP or 40-foot High Cube containers. Upright frames are either flat-packed or pre-bolted into nesting bundles, step beams are interleaved with protective plastic film and banded with high-tensile steel strapping, and deck panels are stacked on wooden skids with corner edge protectors to eliminate transit scratching and maximize offloading efficiency on site.
Signature Racking Systems is trusted by multinational 3PL operators, military warehouses, manufacturing plants, and retail enterprises. Here is what warehouse directors say about our engineering accountability.
Signature engineered and fabricated custom heavy-duty longspan shelving racks for our central parts distribution center. The load calculations were precise, and the galvanized decking handles continuous steel bin friction without chipping. Outstanding service and engineering accuracy.
Tariq Al-MansoorLogistics Director, Automotive Supply Hub
The speed of production at their Ajman factory gave us a significant lead time advantage over importing from the Far East. Our 4-tier longspan catwalk picking mezzanine was designed, delivered, and anchored on schedule with zero disruptions.
Sima BanerjeeOperations Head, Regional 3PL Facility
As an international procurement consultant, direct factory accountability is everything. Signature Racking provided full mill test certificates for the steel coils, CAD drawings, and export packing lists with zero surprises.
Waseem MominSupply Chain Procurement Director
Send your warehouse dimensions or inventory picking requirements. Our technical sales engineers in Ajman will prepare a comprehensive CAD layout and factory-direct quotation within 24 hours.