• Load Capacity: While standard arms handle 600-1000kg, the motorized system is reinforced to support heavy layers of steel plate, with specialized configurations available for loads exceeding standard limits.
• Customization: Herochu understands that sheet metal comes in various sizes. Therefore, the arm length, layer height, and overall rack dimensions are fully customizable.
• Control Systems: The motorized units can be integrated into existing warehouse management systems or operated via independent control panels, offering flexibility in automation levels.

Warehouse operators traditionally separate pallet racking from cantilever racking. Pallet racks handle unit loads on pallets. Cantilever racks handle long, irregular items. Herochu erases this boundary with the telescopic cantilever pallet rack storage rack, a system that combines the load flexibility of cantilever arms with the density objectives of pallet racking. By adding manual telescopic functionality to heavy-duty cantilever arms, Herochu creates a storage solution that handles palletized goods, long tubes, steel plates, and bundled pipes within a single rack footprint. The key differentiator is the retractable arm, which deploys only for loading and unloading, then retracts to collapse the rack’s working aisle.

The structural foundation of the Herochu telescopic cantilever pallet rack storage rack is the upright column frame, fabricated from structural H steel or square tubing per GB-T Q235 and Q345 standards. Multiple frames connect using adjustable diagonal flats and heavy-gauge connecting bars. The connecting bars serve an additional purpose in this configuration: they act as backstops for pallets, preventing over-insertion when using a forklift rather than a crane. Base lengths customize from 1200 mm to 2200 mm, arm lengths deploy from 500 mm to 1000 mm (or up to 3000 mm for special orders), and story heights adjust between 440 mm and 940 mm. Active height between arms ranges from 250 mm to 800 mm.

How does a telescopic cantilever pallet rack storage rack function differently from a standard pallet rack? In a standard pallet rack, the forklift must enter the rack bay to place a pallet. This requires wide aisles and careful alignment. In the Herochu system, the forklift or crane remains in the main aisle. The operator extends the telescopic arm out from the column face, directly toward the forklift. The forklift places the pallet or bundle onto the extended arm. The operator then retracts the arm, pulling the load flush against the column frame. The aisle width no longer needs to accommodate the pallet depth plus forklift turning radius. It only needs to accommodate the retracted arm plus the forklift’s front overhang.

Load capacity per arm reaches 600–1000 kg, identical to Herochu non-pallet telescopic racks. However, the telescopic cantilever pallet rack storage rack often operates with two arms per pallet for stability. A standard 1000 mm x 1200 mm pallet requires two arms spaced 800 mm apart. Herochu provides adjustable arm mounting brackets that slide along the column to achieve exact spacing. For pallets with damaged or uneven bottom boards, the telescopic arms can be fitted with optional cross-planks to create a solid deck. For pipe or tube storage, the same arms work without cross-planks, preserving the open design.

The space savings from using a telescopic cantilever pallet rack storage rack versus a traditional selective pallet rack are substantial. A selective pallet rack with a 1200 mm deep pallet requires an aisle width of at least 3200 mm for a standard counterbalanced forklift. The Herochu system with 1000 mm telescopic arms requires only a 2000 mm aisle because the forklift never enters the rack footprint. Over a warehouse with 50 aisles, this difference converts 60,000 mm of aisle width into usable floor space. That space can be used for additional rack rows, increasing total pallet positions by 40-50% without expanding the building.

Herochu offers substantial customization for the telescopic cantilever pallet rack storage rack. Number of layers ranges from two to seven. Column heights exceed 6.5 meters for high-bay warehouses. For cold storage applications, Herochu can specify low-temperature lubricants and corrosion-resistant coatings. For cleanroom environments, sealed winch mechanisms prevent particulate generation. The manual winch operates smoothly with gloved hands, and an optional electric motor drive is available for very tall racks where operators cannot easily reach the winch handle. OEM modifications accommodate non-standard pallet sizes, unusual load geometries, or integration with automated guided vehicles.

Safety features include positive arm stops, a self-locking winch brake, and guide rollers designed to prevent binding under eccentric loads. The telescopic cantilever pallet rack storage rack from Herochu also includes provisions for anchoring to the warehouse floor. Given the high moment forces generated when a 1000 kg load is fully extended, floor anchors are mandatory for all but the lightest-duty configurations. Herochu provides anchor point specifications and installation drawings. On-site instruction is available for complex installations, and design services can produce seismic-rated versions for earthquake-prone regions.

Backup services from Herochu include spare parts availability, remote troubleshooting, and field service for major repairs. Free samples of the telescopic arm mechanism can be shipped to potential buyers for testing, with the buyer covering delivery costs. For companies considering a large-scale deployment, Herochu offers a design consultation to determine optimal arm length, column spacing, and aisle width based on the specific forklift or crane fleet. The goal is always the same: maximize storage density without sacrificing access speed or safety.

Operational benefits extend beyond space savings. The telescopic action reduces forklift travel distance. Each retrieval requires only a short move from the main aisle to the extended arm, rather than a deep entry into the rack bay. This reduces forklift operating hours and tire wear. It also reduces the risk of rack damage because the forklift mast never contacts the column frame. Herochu has documented 30% faster cycle times in warehouses that switched from selective pallet racks to telescopic cantilever pallet rack storage rack systems.

In summary, the Herochu telescopic cantilever pallet rack storage rack eliminates the traditional trade-off between load flexibility and storage density. It handles pallets, tubes, plates, pipes, and bundles with equal ease. It reduces aisle width requirements by 40% or more. It works with existing forklifts and overhead cranes without modification. For warehouse managers facing space constraints or SKU proliferation, this system offers a clear upgrade path from conventional pallet racking. Herochu provides the engineering, customization, and support needed to deploy telescopic cantilever pallet rack storage rack systems in any industrial environment.

Pipe storage presents a unique material handling problem. Pipes are long, heavy, prone to rolling, and difficult to stack without damage. Fixed cantilever racks improve organization but still require wide aisles for access. Herochu has developed telescopic cantilever shelving for pipe storage that solves the aisle-width problem while maintaining full crane compatibility. This system allows individual arms to extend out from the column face—typically by 100% of their retracted length—creating a temporary loading platform directly under an overhead bridge crane. After loading, the arms retract, pulling the pipes into a compact, stable storage position.

The operating sequence defines the value of telescopic cantilever shelving for pipe storage. First, the operator turns a manual winch connected to the selected arm level. The arm slides outward on precision guides until it reaches its fully deployed position. Next, an overhead crane moves a bundle of pipes directly above the extended arm. The crane lowers the pipes onto the arm, which has been designed with a slight upward tilt or pipe-retention features to prevent rolling. After the crane disengages, the operator reverses the winch, and the arm retracts, bringing the pipes flush against the upright column frame. The entire process takes less than two minutes per arm level.

Herochu constructs each unit with a focus on stability during the extension and retraction cycle. The upright column frame uses welded square tubing with internal guides that maintain arm alignment under eccentric loads. When the arm extends fully with a 1000 kg pipe bundle, the moment force on the column increases significantly. Herochu counters this by specifying base lengths proportional to arm extension. For a 1000 mm deployed arm length, the base length must be at least 1800 mm. Adjustable diagonal flats connect multiple column frames together, distributing the overturning force across the entire row.

Load capacity for Herochu telescopic cantilever shelving for pipe storage is rated at 600–1000 kg per arm. This rating applies to both the extended and retracted positions. However, dynamic loads during extension require additional safety margin. Herochu uses GB-T Q345 steel for all load-bearing arm components, with 45# carbon steel for the winch drum and gear train. The winch mechanism includes a self-locking brake that prevents uncontrolled retraction if the operator releases the handle. For heavier pipe applications, Herochu offers an electric motor option, though the manual winch remains the most common choice for its simplicity and reliability.

Space utilization improves dramatically compared to static cantilever racks. Standard fixed-arm shelving requires aisle widths of at least twice the arm length to allow crane access. For a 1000 mm arm, that means a 2000 mm aisle. Herochu telescopic cantilever shelving for pipe storage reduces the required aisle width to just the retracted arm length plus clearance for the crane hook, typically 1200 mm total. Over a 100-meter-long rack row, this difference saves 80 square meters of floor space. That space can house additional rack rows, increasing total storage density by 60% or more according to Herochu field measurements.

Customization options abound. Arm lengths range from 500 mm to 1000 mm as standard, but Herochu can extend arms up to 3000 mm for oversized pipe diameters. The number of layers per column ranges from two to seven, with story heights adjustable between 440 mm and 940 mm. Active height between arms varies from 250 mm to 800 mm, accommodating pipe diameters from small tubing to large-diameter steel pipe. Column height can exceed 6.5 meters for facilities with high ceilings. Base lengths customize from 1200 mm to 2200 mm, with longer bases required for taller or heavier configurations.

Safety features extend beyond the winch brake. The telescopic cantilever shelving for pipe storage from Herochu includes end stops that prevent arm over-extension. Guide rollers are sealed and greased to prevent jamming from pipe scale or dust. Each arm level operates independently, allowing mixed-height pipe storage on the same column. For example, a facility might store 200 mm diameter pipes on the bottom level with 600 mm active height, 100 mm pipes on the middle level with 400 mm active height, and 50 mm tubing on the top level with 250 mm active height. This flexibility is impossible with fixed-arm systems.

Installation and support from Herochu includes detailed installation drawings and optional on-site instruction. For complex layouts involving multiple rows and crane interference zones, Herochu design services create a full 3D layout. Free samples of the telescopic arm mechanism are available, allowing potential buyers to test fit and operation before committing to a full purchase. OEM customization is offered for special pipe diameters, unusual building geometries, or integration with existing conveyor systems. Backup services include spare parts availability and remote troubleshooting.

For pipe storage yards currently using floor stacking or simple pallet racks, the upgrade to Herochu telescopic cantilever shelving for pipe storage delivers immediate benefits. Floor stacking damages pipes through crushing and scratching. Simple pallet racks lack the length support needed for long pipes, leading to sagging and bending. Herochu shelving supports pipes along their full length (or at multiple points) and keeps them separated by arm level, eliminating contact damage. The retractable arms also reduce the risk of crane-to-rack collisions because the crane never needs to enter the storage footprint.

In high-throughput facilities, the time savings from telescopic access add up. A pipe retrieval that takes five minutes from a static rack (including maneuvering the crane) takes two minutes from a Herochu telescopic system. Over 50 retrievals per day, that saves 150 minutes of crane time, directly improving throughput. For any facility handling long pipes with overhead cranes, Herochu telescopic cantilever shelving for pipe storage offers a proven, durable, and highly space-efficient storage solution.

Heavy-Duty Materials and Construction

Electric Expandability for Maximum Reach

Corrosion Protection for Harsh Environments

Tailored Solutions for Specific Profiles

• Arm Configuration: Arms can be straight, inclined (2°~4°) to assist with loading, or fitted with specific retainers.
• Dimensions: The base length can vary from 1200mm to 2200mm, and the overall height can be adjusted to fit the warehouse clearance.
• Levels: Users can specify anywhere from 2 to 7 levels, depending on the height of the goods and the lifting height of their cranes.

Versatility Across Industries

Structural Integrity and Design

The “Roll-Out” Mechanism Explained

Installation and Scalability

The Electric Advantage in High-Throughput Environments

Safety First: Protecting Goods and Personnel

Optimizing Vertical Space

Durability in Demanding Applications

Pipe and tube storage is notoriously difficult. Round profiles roll off flat surfaces. Long lengths require wide aisles for access. And traditional cantilever racks with fixed arms force warehouses to dedicate entire bays to a single pipe diameter. Herochu solves these problems with the heavy-duty cantilever racking storage rack equipped with an electric telescopic pipe cantilever – a specialized arm design that combines a V-shaped saddle, powered extension, and pipe-specific safety features.

Why Pipe Needs a Specialized Cantilever Arm

Standard cantilever arms have flat or slightly inclined top surfaces. When storing pipes, these flat surfaces allow pipes to roll sideways unless restrained by dividers or rubber mats. Worse, when an operator retracts a telescopic arm with pipes on it, the pipes can shift and fall between arm sections. Herochu’s pipe cantilever uses a formed steel saddle with a 120-degree included angle, lined with replaceable polyurethane pads. The saddle prevents rolling and centers the pipe automatically. For bundles of small-diameter pipes (e.g., conduit), the saddle can be fitted with removable dividers that create individual channels.

The telescopic function is critical for pipe because pipe lengths vary widely. A single rack might store 6-meter pipes on the bottom level and 2-meter offcuts on the top level. With fixed arms, the top-level arms would extend uselessly into the aisle. With Herochu’s electric telescopic pipe cantilever, each arm retracts independently, matching its projection to the actual pipe length stored.

Electric Telescopic Mechanism for Pipe Loads

Pipes present a unique challenge to telescopic mechanisms: they are round and can rotate. If a pipe rotates during arm extension or retraction, it can bind against the saddle or fall off. Herochu addresses this by using a slow-speed, high-torque electric drive. The extension speed is limited to 30 mm per second (compared to 100 mm per second for general-purpose arms). This gives any pipe movement time to settle. Additionally, the saddle includes a spring-loaded detent at the rear – a small raised bump that pipes must roll over to exit the back of the arm. This detent acts as a passive brake.

The telescopic sections themselves are made from seamless round tubing rather than square tubing for pipe cantilevers. Round sections have no corners that could catch a pipe’s edge. The outer tube is 114 mm diameter with 8 mm wall thickness; the inner tube is 89 mm diameter. A nylon bushing between them eliminates metal-on-metal contact. The extension is driven by a ball screw inside the inner tube, protected by a flexible rubber bellows. The ball screw provides smooth, precise motion and is self-locking, so the arm holds position without a separate brake.

Structural Design of Heavy-Duty Cantilever Racking for Pipe Storage

Pipe bundles are heavy. A typical bundle of 6-meter Schedule 40 steel pipe (2-inch nominal diameter) weighs approximately 500 kg. Herochu’s heavy-duty cantilever racking storage racks are built to handle multiple such bundles per level. The upright frames are double C-channel sections back-to-back, welded to a base plate. Each upright has a capacity of 10,000 kg total distributed load. The cantilever arms attach to the uprights using four M20 bolts per arm – not the common pin-and-hole method – because the vibration from loading pipes can loosen pins over time.

The base is critical. Herochu uses a full-width base beam rather than separate footplates. This beam spans the entire width of the rack (typically 1200 mm to 2200 mm) and is made from 250 mm H-beam. It distributes the load across multiple floor anchors, preventing point loading that could crack concrete. For outdoor pipe yards, the base is hot-dip galvanized after welding, with drain holes to prevent water accumulation.

Cross braces between uprights are tubular steel with flattened ends, bolted rather than welded. This allows the rack to be disassembled and moved. For racks taller than 3 meters, Herochu adds horizontal sway braces at each level, creating a rigid box structure.

Electric Control System for Pipe Handling

The electric telescopic pipe cantilever uses a wired remote with an analog joystick rather than push buttons. The joystick gives variable speed control – the further the operator pushes, the faster the arm moves. This is essential for pipe because the operator may need to creep the arm forward to align a pipe with an overhead crane hook. The remote also has a dedicated “pipe unload” mode: when activated, the arm extends 50 mm, pauses, then continues. The initial 50 mm jostle helps settle pipes that have shifted during storage.

For warehouses with multiple pipe diameters, Herochu offers an auto-sensing option. A laser distance sensor on the arm measures the actual pipe length after loading. The system then stores that length in memory and automatically retracts the arm to the minimum projection needed for that bundle. On subsequent retrievals, the arm extends only to that length, saving time and space.

Application: Pipe Distributor Case Study

A Midwest pipe distributor storing 10,000 tons of carbon steel pipe in lengths from 1.5 to 12 meters replaced their floor storage with 20 Herochu heavy-duty cantilever racking storage racks, each with 4 levels of electric telescopic pipe cantilevers. Before the upgrade, retrieving a specific pipe required moving other pipes with a forklift, causing damage and taking an average of 15 minutes. After installation, a single operator uses a remote to extend the correct arm, the overhead crane lifts the pipe bundle, and the arm retracts. Average retrieval time: 1.5 minutes. The distributor reported a 40% increase in throughput and a 90% reduction in pipe surface damage.

The telescopic feature also enabled them to store offcuts efficiently. Previously, cut pieces shorter than 3 meters were thrown into scrap bins because they were too short for the fixed-arm racks. With Herochu’s retractable arms, they now store offcuts on the top levels with arms retracted to match the shorter lengths, recovering material value.

Specifications and Customization

All Herochu heavy-duty cantilever racking storage racks come with SGS and ISO certification. The powder coating process includes a two-stage pickling treatment that creates an oxidation film for superior adhesion – a method Herochu says no other manufacturer matches. Lead time is 20 days for custom orders.

Safety and Maintenance

Pipe storage racks require regular inspection of the polyurethane saddle liners. Herochu designs them to be replaceable without removing the arm from the rack – simply unbolt a retaining plate and slide the old liner out. The ball screw drive should be greased every 6 months via a built-in zerk fitting. The electric motor has a thermal protection switch that automatically resets when cooled.

For facilities subject to seismic activity, Herochu offers base isolation pads that allow the rack to sway up to 50 mm without tipping. This is especially important for pipe racks, which have a high center of gravity when fully loaded.

Conclusion

The heavy-duty cantilever racking storage rack with electric telescopic pipe cantilever is not a generic product adapted for pipe – it is a purpose-engineered system where every detail, from the V-saddle to the ball screw drive, addresses the unique challenges of tubular products. Herochu delivers this system with full customization, short lead times, and certifications that assure quality and safety. For pipe distributors, fabrication shops, and construction material suppliers, this rack transforms a problematic storage category into a competitive advantage.

Storing heavy-duty long loads—such as steel beams, concrete pipes, or marine-grade lumber—requires more than just a sturdy rack. It demands a system that can safely extend and retract under extreme bending moments, maintain alignment over lengths exceeding 15 meters, and withstand the abuse of daily forklift or crane operations. Herochu’s electric telescopic cantilever system addresses these challenges with a heavy-duty design that combines telescopic steel tubes, a robust electric drive, and a frame engineered for dynamic loading.

What Makes a System “Heavy-Duty” for Long Loads?

The term “heavy-duty” is often overused. For Herochu, it means each cantilever arm is rated for a minimum of 1000 kg at full extension, with a safety factor of 2.5x based on yield strength. More importantly, the system is designed for long loads—those with length-to-width ratios exceeding 10:1. Such loads create high lateral forces if the rack is not perfectly level, and they require precise synchronization between multiple arms to avoid twisting.

Herochu’s electric telescopic cantilever system uses a master-slave synchronization approach. One master arm on each upright contains the drive motor and position sensor. Up to four slave arms on the same side are mechanically linked via a torque tube or, in more advanced configurations, independently driven with electronic synchronization. This ensures that when the master arm extends, all slave arms move in unison, keeping the long load horizontal and preventing binding.

Telescopic Cantilever Architecture for Heavy Loads

Traditional telescopic cantilever arms for light duty use C-shaped channels or thin-walled tubes. For heavy-duty applications, Herochu fabricates arms from rectangular structural steel tubing with wall thicknesses of 6 mm to 10 mm, depending on capacity. The telescopic sections are not simple square tubes inside square tubes—they use a captured roller bearing design. Each stage rides on eight hardened steel rollers (four per side) that run in machined tracks. This reduces friction and eliminates metal-to-metal sliding, which would cause galling under heavy loads.

The extension mechanism is a double-strand roller chain driven by a hydraulic motor or, more commonly, an electric linear actuator. Herochu prefers electric linear actuators for heavy-duty telescopic cantilever systems because they provide precise position feedback via an integrated encoder. The actuator pushes a crossbar that connects to the innermost tube, which then pulls the intermediate tube through a cable-and-pulley arrangement. This “push-pull” method achieves up to 3:1 extension ratios—for example, a 1-meter collapsed arm can extend to 3 meters.

For the heaviest applications (e.g., storing 12-meter-long steel I-beams weighing 2 tonnes per pair of arms), Herochu offers a dual-actuator configuration. Two linear actuators, one on each side of the arm, work in parallel. A load-sharing controller ensures they extend at identical speeds, preventing racking. This design has been tested to 2000 kg per arm at 2.5 meters extension.

Structural Frame for Long Load Stability

A cantilever rack is only as strong as its upright column and base. For long loads, the uprights must resist not only the vertical load but also the moment created by the load’s center of gravity being far from the column face. Herochu’s heavy-duty system uses tapered H-beams for uprights, with flange widths of up to 200 mm. The base is a welded assembly of H-beam and channel sections, with outriggers extending 1.5 times the maximum arm extension. For example, if the arm extends 2 meters, the outrigger length is at least 3 meters. These outriggers are bolted to the floor using 20 mm diameter anchor bolts.

Cross bracing is critical. Herochu uses X-bracing with turnbuckles for preload, eliminating any sway. In systems taller than 4 meters or in seismic zones, additional horizontal diagonal braces are installed at every level. The result is a rack that deflects less than L/400 under full load, where L is the arm extension.

Electric Drive and Control Features

The electric telescopic cantilever system can be operated via a handheld controller with a digital display showing actual extension length in millimeters. Operators can program up to 10 preset positions (e.g., 500 mm for short pipes, 1800 mm for long beams). A soft-start, soft-stop feature prevents load swing during acceleration and deceleration. This is especially important for long loads, which have high rotational inertia.

Safety features include:

• Optical obstruction sensors at the tip of each arm. If the sensor detects an object (such as a worker or a pallet) during extension, the system stops and reverses 100 mm.

• Load cells in the arm pivots that measure actual weight. If the load exceeds 110% of rated capacity, the system disables extension and sounds an alarm.

• Redundant brakes – a primary electromagnetic brake and a secondary spring-applied brake for fail-safe operation.

Application Spotlight: Steel Service Centers

A typical customer is a steel distributor handling 12-meter lengths of rectangular hollow section (RHS) weighing up to 800 kg per piece. Before installing Herochu’s electric telescopic cantilever system, they stored RHS on floor racks, requiring a crane operator and two riggers to retrieve one piece. After installation, a single operator uses a remote to extend the desired arm, the overhead crane places the bundle onto the extended arms, and the operator retracts the arms to clear the aisle. The system’s 5-level design tripled their storage density.

For residual material management—cut pieces ranging from 2 to 5 meters—the telescopic function allows the same rack to accommodate varying lengths without leaving empty arm sections protruding into the aisle. This is a key advantage over fixed-arm cantilever racks, which always occupy the same floor space regardless of whether they are fully loaded.

Customization and Lead Times

Herochu offers full customization. The height can range from 0 to 5 meters, number of levels from 2 to 7, and arm length from 500 mm to 1000 mm standard, with telescopic extensions up to 3000 mm upon request. Raw material is GB-T Q235B, Q345, or 45# high-grade carbon steel. Surface treatment is powder coating (standard) or hot-dip galvanizing (for outdoor or wet environments). Lead time is 20 days for standard customizations; complex projects with engineering design may take 30 days. All products include SGS and ISO certification, and Herochu provides installation drawings and remote engineering support.

Long-Term Value

Investing in an electric telescopic cantilever system for heavy-duty long load storage reduces workplace injuries (no manual cranking, no climbing to retrieve loads), increases storage density by up to 200% compared to floor storage, and extends material life by preventing damage from improper stacking. For operations handling steel, pipe, lumber, or concrete products, Herochu’s system represents a quantifiable return on investment typically realized within 18 months of operation.

Warehouse managers often face a trade-off: invest in fully automated storage systems that are expensive and complex, or rely on purely manual racks that require physical effort and slow down operations. Herochu bridges this gap with the Electric Manual Control Extendable Cantilever Storage Rack, a hybrid system that allows operators to choose between electric-powered extension or manual cranking. This dual-mode design ensures continuous operation even during power outages or when working in areas without electrical service.

The Concept of Dual-Mode Cantilever Extension

Traditional extendable cantilever racks use either a hand winch or a fixed electric motor. Hand winches are reliable but slow, requiring dozens of turns to fully extend an arm under load. Electric-only racks become useless if the motor fails or if the rack is moved to a location without power. Herochu’s solution integrates both systems into a compact gearbox mounted at the base of each upright column.

The operator selects the mode via a mechanical clutch lever. In electric mode, a 24V DC motor (powered by a rechargeable battery pack or mains adapter) drives a planetary gear reducer. In manual mode, the operator inserts a folding crank handle into the same input shaft, disengaging the motor via a dog clutch. The same worm gear output drives the telescopic arm sections in either mode.

This dual-mode approach is particularly valuable for extendable cantilever storage racks used in remote storage yards, construction sites, or temporary warehouses where reliable power is not guaranteed. It also provides a low-tech backup for facilities that prefer to keep spare motors on hand rather than rely on service calls.

Telescopic Mechanism Design

Herochu’s extendable cantilever arms use a three-stage telescopic tube assembly. The fixed outer tube mounts to the upright column. Inside it, a middle tube slides on nylon rollers. The inner tube (which carries the load) slides inside the middle tube. A high-strength steel chain connects all three stages, wrapped around sprockets at the end of each tube. When the gearbox rotates a drive shaft, the chain pulls the inner and middle tubes simultaneously, achieving a total extension ratio of up to 2.5:1. For example, a collapsed length of 600 mm can extend to 1500 mm.

Critical to reliability is the load-holding brake. In electric mode, a spring-applied, electrically released brake holds the arm at any position. If power is lost, the brake automatically engages, preventing the arm from retracting under load. In manual mode, the worm gear itself is self-locking (lead angle less than friction angle), so the crank stays in place even if the operator releases it. However, Herochu still recommends using the provided locking pin for long-term static loads.

Manual Control Features for Precision

While electric extension is faster, manual control offers precision advantages. When positioning an expensive long load—such as an aluminum extrusion or a carbon fiber tube—operators often prefer the tactile feedback of a hand crank. The Herochu crank handle has a torque-limiting detent that clicks when maximum manual input torque (50 Nm) is reached, preventing overload. A built-in ratchet allows the operator to reverse direction without removing the handle.

The manual mode also serves as an emergency retraction system. If the electric motor fails with the arm fully extended under a 1000 kg load, the operator can engage the manual clutch and slowly lower the load by turning the crank in reverse. The worm gear’s high reduction ratio (60:1) makes this possible with reasonable effort—approximately 16 Nm of input torque to lower a full load, achievable by an average person.

Application Examples for Hybrid Operation

Consider a metal service center that stores steel tubes in lengths up to 12 meters. The main warehouse has 240V power, so the electric mode is used for routine put-away and retrieval. However, the center also has an outdoor yard where they store over-length materials. Instead of buying separate manual racks for the yard, they use Herochu’s dual-mode racks. When moved outdoors, the battery pack (good for 300 full extension/retraction cycles) powers the electric mode. If the battery drains, manual mode takes over without moving the load.

Another application is in aerospace component storage, where anti-static conditions and spark prevention are critical. Electric motors can generate sparks from brushes. Herochu offers a sealed, brushless DC motor option, but some facilities still prefer manual mode for sensitive areas. The dual-mode rack allows them to use electric mode in general storage zones and manual mode in explosive atmospheres, all within the same rack system.

Technical Specifications and Customization

Herochu builds the electric manual control extendable cantilever storage rack to order. Standard parameters:

The control system includes a wired pendant with emergency stop and a wireless remote as an option. For facilities with multiple racks, Herochu can integrate a central control panel that operates up to 32 racks from one station.

Installation and Commissioning

Each rack ships with pre-assembled upright frames, loose cantilever arms, and hardware kits. Herochu provides installation drawings showing anchor bolt locations and required floor flatness. Assembly time for a 5-level, double-sided rack with 10 arms is approximately 8 man-hours. The electric wiring is plug-and-play: each motor has a waterproof connector that mates to the control cable harness.

Certification includes SGS load testing and ISO 9001 manufacturing. The powder coating process includes a two-stage pickling treatment that creates an oxide film for superior adhesion, a feature Herochu claims no other manufacturer matches. This extends rack life in humid or corrosive environments.

Operational Benefits Summary

Switching from a purely manual extendable cantilever rack to Herochu’s electric manual control model typically reduces retrieval time by 65% for the electric mode while retaining 100% functionality during power failures. The dual-mode design also simplifies maintenance—if the motor fails, the rack remains usable until a replacement motor arrives. For warehouses seeking to future-proof their long-load storage, this hybrid approach offers the best of both worlds.

Handling sheet metal in manufacturing environments presents unique challenges. Standard pallet racks often fail to accommodate the wide, flat dimensions of metal sheets, while floor stacking leads to damage, safety hazards, and inefficient use of floor space. The Electric foldable cantilever rack for sheet metal from Herochu solves these problems by combining powered retraction with a cantilever design specifically engineered for flat stock.

Why Sheet Metal Demands a Specialized Rack

Sheet metal typically comes in gauges from 0.5mm to 6mm, with widths exceeding 2 meters and lengths up to 6 meters or more. Conventional storage methods—leaning sheets against walls or stacking them horizontally—cause edge dings, surface scratches, and dangerous sliding. Moreover, retrieving a single sheet from a stack often requires two workers and risks cutting injuries. A cantilever rack designed for sheet metal eliminates these risks by storing each sheet vertically or on inclined arms, with individual access points.

Herochu’s electric foldable design takes this further. The folding mechanism allows arms to retract when not in use, creating clear aisles for forklifts or overhead cranes. When extended, each arm supports up to 800 kg, sufficient for even heavy-gauge steel plates.

Engineering the Foldable Cantilever Action

Unlike hydraulic or purely mechanical systems, Herochu integrates an electric winch drive into the cantilever base. The operator activates a pendant control or wireless remote, and the motor rotates a worm gear that drives a lead screw. This screw pushes or pulls the cantilever arm assembly along linear rails. The folding motion is not a simple hinge but a controlled telescopic fold: the arm sections slide into each other, reducing the overall projection from full extension (e.g., 1200 mm) to a compact 400 mm.

Key engineering choices include:

• Q235B steel construction for the arm profiles, with a powder-coated finish that resists corrosion from cutting fluids or humidity.

• Double-row ball bearing slides inside the foldable sections, rated for 100,000 cycles.

• Magnetic limit switches that automatically stop the motor at full extension or full retraction, preventing over-travel.

• Manual override crank included for emergency operation if power fails.

The foldable feature is especially valuable for sheet metal because it allows the rack to be placed close to shears or laser cutters. When the operator needs to load or unload, they extend only the required arm. After retrieval, the arm folds back, keeping the aisle clear for other material handling equipment.

Structural Components Customized for Flat Stock

Herochu’s electric foldable cantilever rack uses a base constructed from H-beam steel, welded with gusset plates to resist the high bending moment created by long sheet loads. The upright columns are double-sided or single-sided depending on layout needs. Hole spacing at 100 mm intervals allows vertical adjustment of the cantilever arms in 100 mm increments—critical for accommodating different sheet thicknesses and stack heights.

The arms themselves are unique. Instead of round or rectangular tubes, Herochu uses a tapered C-channel design. The open side faces upward, and a replaceable UHMW polyethylene liner runs along the top edge. This liner prevents metal-to-metal contact, eliminating scratching on finished sheets. For extra safety, each arm includes a raised backstop lip at the rear, preventing sheets from sliding off the back of the rack.

Cross braces connect uprights in both X and Z directions, transforming the individual racks into a rigid bank. For sheet metal storage, Herochu recommends anchoring the rack to the floor using expansion bolts, as the high surface area of stored sheets can catch air currents from passing forklifts.

Operational Workflow for Sheet Metal Shops

A typical use case: A fabrication shop receives a delivery of 4’×8′ sheets of 14-gauge galvanized steel. The forklift driver places a bundle onto the extended cantilever arms of the Herochu rack. Because the arms are foldable, the driver can approach perpendicular to the rack, set the bundle down, then retract the arms halfway—just enough to clear the aisle—while leaving the sheets supported. Later, a machine operator needs a single sheet. They press the extend button, walk to the rack, slide the top sheet forward onto a roller conveyor, and retract the arms. Total time under 30 seconds.

This efficiency translates to documented 40% reduction in material handling labor compared to A-frame racks. Additionally, the electric foldable mechanism eliminates manual cranking, which in traditional mechanical racks causes operator fatigue and inconsistent retraction speeds.

Maintenance and Safety Considerations

Herochu equips every electric foldable cantilever rack with a thermal overload protector in the motor circuit. If the arm encounters an obstruction during extension—such as a sheet that shifted out of position—the motor automatically reverses 50 mm and stops, preventing damage. The powder coating (or hot-dip galvanizing option for outdoor use) meets ISO 1461 standards. Lead time for custom configurations is 20 days, with SGS and ISO certification provided.

For sheet metal storage, the rack’s height ranges from 0 to 5 meters. Higher configurations require seismic bracing in earthquake-prone regions. Herochu’s engineering team supplies installation drawings and can recommend anchor patterns based on local building codes.

Conclusion

The electric foldable cantilever rack for sheet metal is not a generic cantilever rack with a motor added. It is a purpose-built system where every component—from the tapered arm profile to the magnetic limit switches—addresses the specific needs of flat stock storage. By choosing Herochu, fabricators gain a solution that reduces damage, improves throughput, and maximizes floor space utilization.