Engineered for extreme reliability, structural compliance, and maximum utilization of vertical volumetric space.
Setting the Benchmark in High-Performance Logistical and Structural Storage Architecture globally.
Established in 2014, Nanjing Dulis Warehouse Equipment Co., Ltd. (operating globally under the brand DuraRacks) is a premier industrial rack manufacturer headquartered in Nanjing, China. Boasting over 12 years of industry experience and 9 years of direct export experience, our facility spans a modern industrial building area of 38,000 square meters. We specialize in high-capacity pallet racking, drive-in systems, and automated storage solutions, generating an annual export revenue of $32 million USD.
As supply chains undergo digital transformation, the requirements for overhead storage systems have evolved beyond basic load parameters. Today’s global distributors demand high physical density, seismic resistance, modular adaptation, and verified material certificates. DuraRacks bridges these demands by integrating high-precision manufacturing, Finite Element Analysis (FEA), and strict adherence to international design standards.
Quality and structural integrity form the bedrock of our manufacturing philosophy. Our dedicated team of 45 certified QA personnel implements rigorous quality control processes aligned with ISO9001, CE, and FEM standards. Every batch undergoes comprehensive product inspection methods, including ultrasonic weld flaw detection, mechanical tensile testing, static and dynamic load capacity testing, and salt spray corrosion resistance evaluation.
Supported by a robust network of over 1,200 qualified supply chain partners, DuraRacks operates as an integrated direct-export manufacturer. Our primary overseas markets encompass North America, Western Europe, and Australia. We serve a diverse portfolio of client types, primarily catering to 3PL logistics hubs, large-scale e-commerce fulfillment centers, cold storage operations, and heavy industrial manufacturing plants.
Driven by an experienced team of 68 R&D engineers, DuraRacks delivers advanced structural Finite Element Analysis (FEA) and customized CAD/BIM warehouse layout simulations. We offer full OEM/ODM customization options, tailored seismic load engineering, special powder-coating finishes, and custom beam profile dimensions. Last year alone, our engineering team launched 85 new product innovations and patented racking components, ensuring cutting-edge storage efficiency for our global clientele.
Exploring structural durability, mechanical design limits, and our technological evolution towards Industry 4.0.
The manufacturing of heavy-duty and light-duty overhead storage solutions requires a deep understanding of metallurgy, physics, and load-distribution dynamics. At DuraRacks, our engineering processes are designed to mitigate the risks associated with structural fatigue, progressive collapse, and seismic triggers.
We construct our racking profiles from premium-grade Q235B and Q355B cold-rolled steel. The high yield strength of Q355B allows us to reduce profile thickness while maintaining equivalent structural load capacities. This formulation results in lightweight structures that do not compromise safety. Through cold-rolling, the molecular grain structure of the steel aligns parallel to the stress vectors, increasing the buckling resistance of vertical upright frames.
Exposure to moisture, chemicals, and temperature fluctuations can lead to oxidation and structural failure. DuraRacks employs an advanced multi-stage automated electrostatic powder coating line. The steel profiles undergo a 7-stage pre-treatment wash, including zinc phosphating, to ensure optimal coating adhesion. The epoxy-polyester thermosetting powder is cured at 200°C, producing a dense cross-linked polymer shell that passes 500-hour salt spray testing (ASTM B117 standards).
| Material Property | Q235B Carbon Steel | Q355B Low-Alloy Steel | Impact on Overhead Storage Capacity |
|---|---|---|---|
| Yield Strength (MPa) | 235 Min | 355 Min | Higher yield allows larger spans without deflection. |
| Tensile Strength (MPa) | 370 - 500 | 470 - 630 | Provides maximum resistance against catastrophic overload. |
| Elongation at Break (%) | 26% | 22% | Ductility absorbs kinetic energy during seismic shifts. |
| Standard Applications | Light-to-Medium Duty Racks | Heavy-Duty Industrial Attic Racks | Ensures targeted safety factors (1.5x to 1.8x load factor). |
Visualizing our end-to-end automated manufacturing processes, from raw coils to finished structural racks.
Raw Material
Cutting
Cold Rolling
Punching
Bending
Welding
Polishing
Painting
Warehouse
Cutting Machine
Cold Rolling Machine
Punching Machine
Laser Cutting Machine
Painting Line
Bending Machine
Providing customized systems tailored for heavy industrial, third-party logistics, cold chain, and high-turnover retail.
High-turnover third-party logistics (3PL) providers require robust racking systems that facilitate maximum inventory accessibility. Our multi-level industrial attic systems and heavy-duty pallet configurations allow logistics operators to scale upward, reducing overhead costs by using vertical warehouse space instead of expanding horizontally.
Cold storage operations operate under strict thermal constraints where space utilization directly impacts energy costs. Our hot-dip galvanized and low-temperature powder-coated solutions resist corrosion from condensation and maintain structural performance at temperatures as low as -30°C, ensuring food safety and structural longevity.
Modern retail environments require store fixtures that balance product accessibility with high structural safety standards. Our grocery shelving, cosmetics baskets, and single-sided convenience racks combine visual presentation with heavy load capabilities, minimizing spatial footprints in retail zones.
Ensuring our systems meet international regulatory standards for safety and structural reliability.
Safety in industrial racking is governed by strict national and regional engineering standards. DuraRacks designs, simulates, and manufactures products in compliance with the following international frameworks:
Our engineering team utilizes Finite Element Analysis (FEA) to simulate dynamic stresses, verifying load capacities and deflection limits. By simulating structural behavior prior to fabrication, we ensure that every frame installed is built to perform safely under its design capacity.
A transparent workflow from initial request to delivery, designed for major global enterprises.
Our 68 R&D engineers use dynamic CAD models and BIM layouts to build a detailed digital twin of your warehouse facility. We perform FEA calculations to determine spatial configurations and safe load paths.
Every batch of raw steel is sourced from verified state-owned mills and accompanied by mill test certificates (MTC). We verify thickness, chemical composition, and yield strength before production begins.
Our 45 QA inspectors perform non-destructive ultrasonic testing on welded connections, pull-out tests on anchors, and paint adhesion tests to verify that every component conforms to our quality standards.
Providing clear answers to technical questions about our manufacturing processes, capabilities, and delivery.
Engineered options for warehouses, commercial centers, and retail stores.
DuraRacks
