Warehouse managers handling sheet metal often improvise with general-purpose racks, only to discover bent panels, scratched surfaces, and inefficient space use. The root cause is simple: sheet metal has unique physical properties – large surface area, high density per unit thickness, and sensitivity to edge contact – that generic storage equipment ignores. Herochu, operating as a specialized sheet metal storage equipment manufacturer, has spent 16 years developing solutions that address these properties from first principles. Based in Jinan with a 16,000㎡ factory and 300 employees, the company produces laser-cut shelving, drawer-type units, telescopic cantilever racks, and heavy-duty systems that integrate with automated loading. This article explores the engineering decisions, quality protocols, and customization capabilities that define Herochu’s approach to sheet metal storage.
The Technical Challenges of Sheet Metal Storage
To design effective equipment, a sheet metal storage equipment manufacturer must understand three physical behaviors:
- Deflection under self-load – A 3mm×2m×1m steel sheet weighs approximately 47 kg. Stacked 30 high, the bottom sheet bears 1.4 tonnes across its area. Without continuous support, the sheet’s center sags, taking a permanent set. Storage racks must therefore provide full planar support or closely spaced cross-supports.
- Edge burr damage – Sheared or laser-cut sheet edges have micro-burrs that act like cutting tools. When one sheet slides against another, burrs score surfaces, ruining painted or stainless finishes. Racks need non-abrasive contact surfaces and controlled extraction methods.
- Tipping hazard – Tall stacks of sheets have a high center of gravity. A forklift striking a corner can cascade the entire stack. Racks must incorporate backstops, anti-tip brackets, or drawer interlock mechanisms.
Herochu’s product specifications directly target these challenges, as detailed below.
Product Portfolio for Sheet Metal Storage
Herochu’s equipment line includes four principal configurations, each suited to different inventory profiles:
- Laser-Cut Metal Shelving – The uprights are produced on a 250-ton roll former, then laser-cut with a 50mm×15mm hole pattern. The laser cutting (rather than punching) eliminates burrs inside holes, ensuring smooth beam insertion. Shelves are 1.5mm corrugated decks with formed flanges that resist bending. For extra-heavy sheets (≥10mm thickness), optional solid 3mm decks are available.
- Drawer-Type Metal Shelving – Each drawer unit operates independently, allowing access to any sheet without moving others. Drawers are constructed from 3mm side plates and 2mm bottom plates, welded with reinforcing channels. The telescopic slides are rated for 1000kg per drawer pair and include a rubber bumper at full extension to prevent abrupt stops. A gas spring assist is optional for drawers exceeding 1500kg.
- Telescopic Cantilever Metal Shelving – Ideal for long sheets (4m–8m). The arms retract into the upright for storage then extend up to 600mm for loading/unloading. This design eliminates the need for wide aisles; a 2.8m aisle accommodates sheets up to 4m long. Each arm has a polyurethane-coated saddle that cradles the sheet edge without scratching.
- Heavy-Duty Metal and Pipe Shelving – A modular system where the same uprights accept either sheet decks (solid or corrugated) or pipe cradles. This hybrid configuration suits service centers that handle both flat products and tubular sections. Changeover from sheet to pipe mode takes less than 30 minutes per bay.
Standardized Production Lines with Automated Control
Herochu’s factory operates seven synchronized production lines: roll forming, laser cutting, robotic welding, electrostatic coating, assembly, load testing, and packing. Key links are automated to ensure repeatability. For example, the roll forming line uses 17 stations with servo-controlled feed rates; if a dimensional tolerance is exceeded, the line automatically halts and flags the batch. Robotic welding cells use vision systems to locate joint positions, compensating for any thermal distortion from previous operations. This level of automation directly contributes to steadily rising daily output – Herochu increased monthly production by 22% over the past year without adding headcount.
Surface Treatment: Electrostatic Spraying in Detail
Sheet metal storage equipment must resist corrosion from two sources: ambient humidity and dissimilar metal contact (e.g., storing galvanized sheets on bare steel racks). Herochu’s solution is a five-stage pretreatment followed by electrostatic spraying:
- Alkaline degreasing (60°C, 5 minutes) – removes mill oils
- Hot water rinse
- Acid pickling (ambient, 3 minutes) – removes scale
- Reverse osmosis rinse
- Zinc phosphate conversion coating (50°C, 2 minutes) – creates micro-crystalline surface for adhesion
After drying, epoxy-polyester powder is applied using corona guns at 80 kV. The coated parts pass through a 180°C curing oven for 20 minutes. Resulting film thickness is 60–100μm, with a gloss level (60° angle) of 30–40%. Cross-hatch adhesion tests per ISO 2409 achieve rating 0 (no detachment). Salt spray testing per ASTM B117 exceeds 500 hours with no red rust. For food-grade or medical environments, Herochu can supply white or light gray coatings that are FDA-compliant for incidental contact.
Certifications and Quality Management
As a professional sheet metal storage equipment manufacturer, Herochu maintains ISO9001:2015 certification for its entire operation – from design to after-sales service. Product certifications include CE (EN 15512, EN 15635) for the European market, with technical files reviewed by a notified body. For Australian customers, AS4084:2012 certification is available upon request. Herochu’s quality manual requires 100% inspection of critical dimensions: upright hole spacing (±0.5mm), beam straightness (≤1mm per 2m), and coating thickness (five-point average). Non-conforming parts are scrapped or reworked before assembly. This rigor ensures that every rack leaving the factory meets the same standards as the pre-production prototype.
OEM and ODM Engineering Capabilities
Herochu’s 16 years of experience translate into a technical team that understands both production realities and application needs. For OEM clients, the company can manufacture sheet metal storage equipment to proprietary designs, including customer-specific hole patterns, embossed logos, or custom RAL colors. For ODM projects, Herochu’s engineers conduct on-site or virtual audits of the customer’s warehouse, measuring sheet sizes, weights, and retrieval patterns. Based on this data, they produce 3D models and FEA load reports within two weeks. Recent ODM examples include a cantilever rack with integrated scale for inventory tracking and a drawer rack with motorized opening for heavy stainless steel sheets. Minimum order quantities are flexible, thanks to Herochu’s modular tooling that allows cost-effective small batches.
Global Export Experience
With 16 years of export experience, Herochu has shipped sheet metal storage equipment to over 40 countries. Packaging follows export standards: each component is wrapped in stretch film, corner-protected with cardboard, and banded to a wooden skid (ISPM-15 certified for fumigation). Container loading plans are provided in advance, with photos and videos of the packed container. Herochu handles all documentation – commercial invoice, packing list, bill of lading, certificate of origin, and any required inspection certificates (e.g., SGS, Bureau Veritas). Lead times for standard products range from 25 to 45 days depending on quantity, with expedited options available for urgent orders.
Conclusion
Selecting a sheet metal storage equipment manufacturer is a strategic decision that affects daily operations, material costs, and worker safety. Herochu brings 16 years of focused engineering, a 300-person team, and a 16,000㎡ factory equipped with automated production lines to deliver racks that solve the real problems of sheet metal handling. From laser-cut shelving and drawer systems to telescopic cantilevers and automatic warehouses, each product is tested, certified, and finished to withstand industrial environments. For global customers seeking ISO, CE, or AS certified equipment with full traceability, Herochu provides a reliable, scalable partnership.
