Automatic Storage Solutions for Metal Pipe: Herochu High-Density Intelligent Warehouse

Metal pipe and profile storage has long been constrained by two physical realities: the irregular geometry of long materials and the immense floor space required for traditional racking. Conventional warehouses using cantilever racks or floor stacking typically achieve storage densities of 1.5 to 2 tonnes per square meter at best. The Herochu automatic storage solutions for metal pipe break this limitation through a fundamentally different mechanical architecture—one that eliminates fixed aisles in favor of a gantry-operated, multi-depth vertical tower system.

The core of the Herochu system is a loading and unloading gantry robot that travels on floor-mounted linear guide rails. Unlike automated storage and retrieval systems (AS/RS) designed for pallets, this gantry spans the entire width of the storage zone, with a maximum span of 25 meters in multi-tower configurations. The robot carries a lifting carriage powered by chain drive transmission, identical to the vertical lifting mechanism—a design choice that simplifies spare parts inventory and maintenance procedures. Vertical lifting speed is rated at 9 meters per minute, while horizontal inlet and outlet movement reaches 12 meters per minute. These speeds are deliberately moderate. Higher speeds would induce load sway in long, slender profiles, increasing cycle times due to settling delays. At the current speeds, the system achieves 15 to 20 picks per hour under typical mixed-profile operation, which is comparable to much faster systems because settling time is virtually eliminated.

The storage structure itself consists of profile material racks arranged in vertical towers, with each tower containing multiple storage levels. The number of layers is configurable between 8 and 13, depending on factory ceiling height and the maximum profile length being handled. Standard profile lengths accommodated are 6015 mm, 6020 mm, and 6025 mm—common dimensions for structural steel, aluminum extrusions, and industrial tubing. Each storage level has a load capacity of either 3 tonnes or 5 tonnes per layer, selectable during system design. The combination of up to 13 layers and 5 tonnes per layer gives a single tower a theoretical maximum static load of 65 tonnes, but the practical operating limit is lower due to dynamic factors and the need for retrieval access.

What distinguishes automatic storage solutions for metal pipe from general-purpose automation is the handling of geometric diversity. Round pipes roll. Square tubes stack but shift laterally. I-beams have asymmetric weight distribution. Angle irons nest unpredictably. The Herochu system addresses this through an optionally selectable profile support system. Each storage level can be fitted with a different support profile: V-shaped supports for round pipes and tubes, flat supports for solid bars and square sections, wide-flange supports for channels and I-beams, and comb supports for bundled small profiles. A single installation might have V-supports on level 1 for 6-inch schedule 40 pipe, flat supports on level 2 for 50mm square bar, comb supports on level 3 for bundles of 12mm rebar, and wide supports on level 4 for C-channels. The warehouse control software (WCS) maintains a precise map of which profile type is assigned to which level and directs the gantry accordingly.

The load capacity claim of 500 tonnes stored within approximately 200 square meters is not marketing exaggeration. This density calculation assumes standard 12-meter bar length and 10 storage levels, with narrow aisles between towers reduced to the minimum width required for gantry carriage travel. Traditional racking would require aisles wide enough for forklift turning radius—typically 3.5 to 4 meters. The Herochu gantry travels on fixed rails and does not turn, so aisle width is determined only by the clearance needed for profile extraction, typically 1.2 meters. This reduction in aisle width alone doubles linear storage density. Combined with vertical stacking up to 13 levels and the elimination of fixed rack beams (the gantry places profiles directly onto supports), the system achieves a volumetric efficiency that no traditional pallet rack or cantilever system can match.

Installation considerations are practical. The main structure has high load-bearing capacity and is constructed from welded steel sections with baked enamel or galvanized finish. Guide rails are precision-ground and anchored into a reinforced concrete floor. The system can be configured to store single profiles or bundled profiles of different types without hardware changes—only software reconfiguration. Bundling is particularly useful for small-diameter pipes or bars where individual handling would be too slow. The gantry’s fork or gripper attachment can be swapped or adjusted, but the standard configuration uses a set of retractable arms that engage the profile from below, lifting it off the supports. For bundled profiles, the arms are wider and have a comb-like structure that distributes lifting force across the entire bundle width.

From an operational perspective, the Herochu automatic storage solution integrates with upstream and downstream processes through inbound and outbound stations. These stations are simple roller conveyors or fixed tables where operators or forklifts place incoming profiles. The gantry picks from the inbound station, reads a barcode or RFID tag (or performs dimensional verification using laser sensors), then deposits the profile into the assigned storage location. Outbound retrieval is the reverse: the gantry fetches the requested profile and places it on the outbound station. For high-throughput operations, multiple gantries can operate on the same rail system with collision avoidance zones managed by the WCS.

Maintenance requirements are low. Chain drives are enclosed and lubricated automatically. Linear guide rails have wipers to exclude debris. The only regular consumables are the polyurethane wear pads on the gripper arms and the chain lubricant. Mean time between failures (MTBF) for the gantry system exceeds 8,000 operating hours based on field data from installations in heavy fabrication environments. Mean time to repair (MTTR) is under 4 hours for most components, with the control cabinet and drives being modular replacements.

For factories currently using floor stacking or manual cantilever racks, the transition to automatic storage solutions for metal pipe typically reduces floor space dedicated to storage by 60 to 70 percent and eliminates forklift traffic in the storage zone entirely. Forklift-related product damage—a major cost in profile handling—drops to near zero. The ROI calculation is straightforward: square footage savings valued at local industrial real estate rates, plus labor savings from eliminated search and retrieval time, plus damage reduction. Most installations achieve payback within 18 to 30 months.

Herochu offers turnkey implementation including site survey, foundation design, system installation, and WCS configuration. The company also provides a remote monitoring service that tracks system performance and alerts maintenance staff to developing issues such as chain wear or guide rail misalignment before they cause downtime.