Warehouse operators frequently encounter goods that defy conventional storage categories. Special shape goods—items that are not rectangular, cylindrical, or uniformly shaped—present unique handling difficulties. Examples include automotive body panels, aircraft wing spars, boat hull sections, timber trusses, and industrial machinery components. These items often have protrusions, varying cross-sections, or fragile surfaces that cannot tolerate stacking. Herochu has developed a heavy-duty long cantilever racking system specifically for special shape goods storage. This article explores the engineering principles, adjustable support options, load containment strategies, and warehouse layout considerations for facilities dealing with non-uniform products.

Defining the Challenge of Irregular Goods

Standard pallet racks assume goods can be placed on flat decks or between horizontal beams. Special shape goods violate this assumption. An aircraft wing spar, for example, may be 15 meters long with a tapered width and multiple attachment points. Storing such an item on a flat rack would require custom cradles, and even then, access to the entire length for inspection or retrieval would be blocked by rack uprights. Cantilever racking solves this by eliminating front obstructions entirely. However, standard cantilever arms with flat top surfaces are still insufficient because irregular goods often require point supports at specific locations along their length. Herochu addresses this through a modular support system that attaches to the cantilever arms, allowing custom cradles, rollers, or adjustable pads to be positioned exactly where needed.

Adjustable Support Technologies

The core innovation in the Herochu special shape goods rack is the adjustable support interface. Each cantilever arm is drilled with a pattern of 16 mm diameter holes at 50 mm centers along its top flange. Into these holes, operators can insert removable support posts of various heights and shapes. Options include flat rubber pads for finished surfaces, V-shaped rests for rounded components, roller conveyors for sliding items into position, and clamping fingers for items that must be secured against movement. The support posts are secured with spring-loaded pins, allowing reconfiguration in under one minute per post. For extremely irregular items, Herochu offers a laser templating service where the customer provides a 3D scan of the product, and Herochu fabricates custom support cradles that match the product’s exact geometry.

Long Span Design for Extended Lengths

Special shape goods are often longer than standard industrial materials. Boat hull sections can exceed 20 meters. Wind turbine blade segments reach 30 meters or more in storage. Herochu’s heavy-duty long cantilever racking is engineered for spans up to 24,000 mm between columns, with multi-bay configurations available for even longer items. Achieving such spans requires careful attention to arm deflection. Herochu uses a truss-style arm construction for lengths exceeding 3,000 mm. Instead of a solid steel bar, the arm consists of an upper and lower chord connected by diagonal web members, similar to a bridge truss. This design provides high stiffness-to-weight ratio, allowing arm lengths of 4,000 mm while limiting deflection to L/300 under full load. For comparison, a solid bar of the same weight would deflect nearly twice as much.

Heavy Duty Loading Parameters

Special shape goods can be extremely heavy despite their irregular shapes. A single mold for automotive stamping may weigh 8,000 kg. An industrial turbine housing may exceed 12,000 kg. Herochu’s heavy-duty cantilever racking accommodates these loads through reinforced column sections and dual-arm configurations. Each storage level can be fitted with two parallel cantilever arms, effectively doubling the load distribution points. The maximum load per level is 5,000 kg for standard configurations, but custom designs can reach 10,000 kg per level using SS401 steel with increased thickness. For the heaviest items, Herochu recommends a four-arm configuration where two arms on each side of the column support a common crossbeam, creating a platform rather than individual arms. This platform can then accept custom cradles or direct placement of the special shape good.

Column Height and Vertical Clearance

Many special shape goods have significant vertical dimensions. A large industrial fan housing may be 2,500 mm tall, requiring equally tall column sections to provide clearance above the stored item. Herochu columns are available in heights up to 12,000 mm, with vertical clearance between levels adjustable from 600 mm to 1,500 mm. For items that exceed the clearance between fixed arms, Herochu offers a variable-position arm system where arms can be moved to any height without tools. This system uses a cam-lock mechanism similar to pipe clamps, allowing an operator to release, slide, and relock an arm in under 30 seconds. This is particularly valuable for warehouses that store a rotating inventory of different special shape goods, each with unique height requirements.

Load Containment and Security Features

Irregular goods are more likely to shift during seismic events or accidental impacts compared to regular loads. Herochu incorporates several containment features into the special shape goods rack. Removable load bars can be inserted across the front of each level, creating a barrier that prevents items from rolling or sliding off the arms. For items that must remain absolutely stationary, ratchet straps can be anchored to tie-down points welded to the column flanges. Each column has four tie-down points per level, with a working load limit of 500 kg per strap. For high-value or delicate special shape goods, Herochu offers an optional enclosure system consisting of mesh panels that close off the front of each storage bay, preventing unauthorized access or accidental contact from passing forklifts.

Warehouse Layout and Material Flow Integration

Storing special shape goods often requires rethinking the entire warehouse material flow. These items are typically moved by overhead crane, gantry crane, or specialized lift equipment rather than standard forklifts. Herochu works with warehouse designers to position cantilever racks so that crane coverage overlaps all storage positions without dead zones. For very long items, a transfer aisle at the end of the rack allows cranes to reposition along the length of the rack. This is particularly important when special shape goods are stored horizontally but must be rotated vertically for installation or processing. Herochu offers powered turntable bases that rotate the entire rack assembly by up to 180 degrees, presenting the opposite side of the rack to the crane without moving the stored items individually.

Durability Under Harsh Conditions

Many special shape goods are stored in non-climate-controlled environments such as outdoor laydown yards or semi-enclosed warehouses. The Herochu racking system is available with a complete hot-dip galvanized finish, providing corrosion protection even in coastal or high-humidity locations. All fasteners are zinc-plated grade 8.8. The UHMW arm pads are replaced with stainless steel rollers for outdoor applications where sand or grit would embed into plastic surfaces. For cold storage warehouses operating at -30°C, Herochu uses low-temperature impact-tested steel certified to EN 10225, preventing brittle fracture that could occur with standard steel grades.

Conclusion

Special shape goods demand a storage solution as unique as the items themselves. Herochu heavy-duty long cantilever racking delivers this through adjustable support interfaces, extended spans, heavy load capacity, and flexible column heights. Warehouses handling irregular products will find that this system reduces damage, improves accessibility, and adapts to changing inventory profiles. Custom engineering support is available for items that exceed standard parameters, ensuring that even the most unusual special shape goods can be stored safely and efficiently.