Electric Sheet Metal Storage Rack: Heavy Duty Drawer System

Fabrication shops and steel distribution centers that handle plate inventory across multiple grades and thicknesses need storage that does more than hold material — it must classify, protect, and retrieve efficiently. The Herochu electric sheet metal storage rack with heavy duty drawer system delivers this through a motorized vertical architecture where each drawer layer carries up to 20,000 kg and extends independently for direct material access.

Heavy Duty Drawer System Architecture

Each drawer in the Herochu system is a self-contained pallet unit: a reinforced steel tray mounted on industrial ball bearing slide rails, driven by an electric motor, and rated for a specific maximum load. The drawer is not a shelf — it is a movable platform designed to carry full-weight plate material from its storage position inside the rack to an access point at the rack face, then return it to storage.

This distinction matters operationally. A shelf stores material statically and requires the operator to reach into the rack to retrieve it. A motorized drawer brings the material to the operator. For sheets weighing hundreds or thousands of kilograms, this difference determines whether retrieval is a safe single-person task or a multi-person rigging operation.

The drawer system handles loads from 1,000 kg per tier on lighter models up to 20,000 kg per tier on the HC-B12025E-520, which accommodates 12,000 by 2,500 mm plate formats. Standard tier counts range from 3 to 15, with clear space customizable at 120 mm or greater to suit plate thickness ranges up to 200 mm.

Electric Drive and Operational Control

Electric-assisted drive moves loaded drawers at controlled speeds: 2.97 m/min on the HC-B3015E-63, HC-B4015E-63, and HC-B4020E-63 models; 2.28 m/min on the HC-B6015E-65; and 5.27 m/min on the largest HC-B12025E-520. Remote control operation allows the operator to stand clear of the drawer path during extension — a safety consideration when heavy plates shift slightly during travel.

The drive system requires no manual cranking, no hydraulic pumping, and no physical pulling force from the operator. This makes the system practical for facilities where drawer loads regularly exceed what manual pull-out systems can handle safely, and where the labor cost of dedicated material retrieval teams impacts operational overhead.

Q235B Frame Integrity Under Cyclic Loading

The Herochu rack frame is constructed from Q235B high-strength cold-rolled steel — a structural grade chosen for its yield characteristics under the cyclic loading pattern that drawer rack operation creates. Unlike static storage where the frame bears a constant load, a drawer rack frame experiences shifting load distribution every time a drawer extends or retracts. The dual-beam crossbar design at each tier connection addresses this by transferring drawer load to both upright columns simultaneously, preventing the stress concentration that single-beam joints develop over thousands of extension cycles.

All structural surfaces receive zinc coating for corrosion protection, with a powder coating finish on exterior components. This combination protects against the atmospheric conditions present in fabrication environments — humidity, cutting fluid mist, metallic dust — that would accelerate degradation on untreated steel.

Space Utilization and Vertical Density

The vertical drawer design stores up to 60 percent more sheet metal in the same floor area compared to traditional cantilever rack systems. This density gain comes from eliminating the permanent access aisles that cantilever arms require — motorized drawers extend on demand and retract fully into the rack body, so the floor space in front of the rack is used only during active retrieval, not permanently dedicated to access.

For facilities operating in leased or space-constrained buildings, this density improvement can defer or eliminate facility expansion. The same warehouse footprint that previously stored 40 tons of plate inventory on cantilever racks can accommodate substantially more material on a motorized drawer system of equivalent width.

Classification, Retrieval, and Production Feeding

Drawer separation enables classification by material type, thickness, or specification. Each drawer front carries a label slot for content identification. When a laser cutting machine or fabrication line calls for a specific material grade, the operator extends that drawer, retrieves the required sheet with a crane-mounted vacuum lifter or forklift, and retracts the drawer — no other material is handled.

This direct-access retrieval reduces picking time by up to 70 percent versus horizontal stacking. For operations feeding automated cutting equipment where material supply rate directly determines machine utilization, this retrieval speed translates to measurable production output gains.

Customization and Certification

The complete Herochu rack series provides five standard models covering sheet dimensions from 3,000 by 1,500 mm through 12,000 by 2,500 mm, with tier capacities from 3,000 to 20,000 kg. Custom drawer dimensions accommodate standard 4 by 8 foot and 5 by 10 foot sheet products, and optional casters enable mobile configurations for facilities that reconfigure material flow between production runs. Every unit carries CE and ISO certification and undergoes factory pre-load testing before shipment, ensuring the drawer system performs to rated capacity from first deployment.