OEM/ODM Patio Storage Solutions Manufacturers & Exporter

About Nanjing Dulis Warehouse Equipment Co., Ltd. (DuraRacks)

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. Our team translates heavy industrial cold-rolling and structural engineering expertise into robust outdoor and patio storage systems that withstand severe weather environments, dynamic load changes, and demanding operations.

Quality Assurance & Testing 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. This ensures that every steel member, frame, and panel leaving our factory is optimized for extreme load-bearing applications and prolonged atmospheric exposure.

1. Advanced Material Science: Combating Rust and Degradation

Traditional outdoor storage structures degrade rapidly due to ultraviolet (UV) radiation, high humidity, salt fog exposure, and fluctuating ambient temperatures. To guarantee long-term performance, DuraRacks selects carbon structural steel conforming to international standards (e.g., Q235B, Q345B). Standard hot-dip galvanized (HDG) coating layers are applied, producing a metallurgical bond between the zinc layer and the underlying steel structure.

Following zinc coating, panels are treated with a multi-stage thermosetting epoxy-polyester architectural powder coating. This dual-barrier defense achieves a highly dense chemical structure that prevents oxygen and moisture infiltration. Salt spray corrosion evaluations executed in laboratory chambers demonstrate continuous exposure tolerance exceeding 1,000 hours without red rust propagation, complying with marine environment classification C5-M criteria.

2. Structural Load Engineering & Seismic Design

Whether storing heavy landscaping machinery, inventory, or retail equipment, patio and outdoor systems must withstand horizontal shear forces from high wind loads and horizontal accelerations from seismic events. Our engineering team designs all racking and structural components utilizing Finite Element Analysis (FEA). Simulation metrics are calculated based on national building codes, assessing factors like deflection under load, column buckling loads, and joint rotation stiffness.

Using 3D CAD/BIM software, we generate comprehensive structural simulations to ensure stable support distribution under variable loads. By analyzing the structural integrity of upright frames, beams, and dynamic connectors, DuraRacks provides customized base plates, heavy-duty floor expansion anchors, and strategic sway bracing configurations that guarantee compliance with regional building and safety codes.

3. OEM/ODM Customization Pipeline

No two enterprise deployment scenarios are identical. Retail, 3PL hubs, and industrial warehouses require custom sizing, finishings, and connection configurations. DuraRacks utilizes a flexible OEM/ODM workflow, beginning with client layout consultation and continuing through to complete structural design. In 2023, our engineering division designed and launched 85 patented components and configurations to solve unique loading and space challenges.

Our customization service covers variables such as custom powder-coating finishes, specialized rack dimensions, seismic load configurations, and custom connection types. Every custom order is manufactured on computer-controlled, automated production lines, ensuring high structural consistency and reliable alignment across all components.

4. Global Supply Chain Integration & Logistics

Operational scaling requires a robust and resilient supply chain. Backed by a network of 1,200+ qualified supply chain partners, DuraRacks maintains consistent production capacity and material availability. Standardized production setups allow us to manage raw material costs while keeping lead times low.

With an annual export volume reaching $32 million USD, we possess deep logistics expertise serving North America, Europe, and Australia. We oversee export compliance, shipping consolidation, and clearance processes, ensuring that your storage equipment arrives on-site packaged securely to prevent damage during transit.