Ningbo Jiulong Machinery Manufacturing Co., Ltd (NJMM), established in 1993, has emerged as the global leader in the design and fabrication of heavy-duty metal grating stairs and industrial platforms. We operate as a modern high-tech enterprise, seamlessly integrating scientific research, digital manufacturing, and international logistics.
Production Area (m²)
Auto Welding Lines
Annual Tonnage (Tons)
Global Compliance
NJMM is not just a supplier; we are your strategic engineering partner. With two massive production bases in East and North China, our facility leverages robotic welding, laser-guided cutting, and digital control panel tailoring to ensure that every stair tread meets exact tolerances. We participated in drafting the Chinese national standard YB/T4001 for steel gratings, positioning us at the forefront of industry innovation.
Modern industrial projects in 2024 and beyond are moving away from standard catalog items toward Custom Metal Grating Stairs. The shift is driven by the need for higher load ratings in offshore wind farms, petrochemical refineries, and automated logistics hubs. NJMM addresses this through modular design that allows for rapid onsite assembly without hot work.
Global safety standards (OSHA, Eurocode, AS3661) now strictly mandate specific "Slip Resistance" levels. Our serrated welded bar gratings and high-visibility nosings provide the necessary friction coefficients to prevent accidents in high-moisture or oil-prone environments.
As a certified "Green Factory," NJMM utilizes high-efficiency hot-dip galvanizing processes that reduce waste and energy consumption. Our products contribute to LEED points in sustainable building projects worldwide.
In corrosive maritime environments, our JG series gratings (e.g., JG325/30/100) offer superior durability. The open-grid design minimizes windage on high-altitude platforms and ensures quick drainage during storms.
From subway ventilation screens to airport walkways, our custom stair treads provide the aesthetic appeal of modern architecture combined with the brute strength of industrial steel.
Our heavy-duty gratings (e.g., JG1008/30/100) are engineered to support massive static and dynamic loads, essential for ore processing plants and equipment protection zones.
Choosing NJMM means tapping into the most efficient industrial supply chain in the world. Located in Ningbo, one of the world's busiest ports, we provide unparalleled logistics advantages:
Implementation of AI vision systems on our welding robots to detect micro-defects in real-time, ensuring 100% weld integrity for every bar junction.
Researching lightweight, high-strength aluminum and composite-integrated steel gratings to reduce the total dead weight of structural staircases by 20% without sacrificing load capacity.
Future iterations of our stair systems will offer optional IoT stress sensors for high-traffic industrial zones, enabling predictive maintenance alerts before structural fatigue occurs.
Hot-dip galvanization provides a metallurgical bond between the steel and the zinc coating, creating a durable layer that protects against rust and corrosion for up to 50 years in mild environments. It is significantly more durable than painting or cold galvanizing.
Plain grating is ideal for most dry industrial applications. However, if your facility involves liquids, oils, or ice, serrated grating is highly recommended as the notched edges provide superior anti-slip traction, ensuring worker safety.
Absolutely. Our digital tailoring service allows us to manufacture stair treads and landings to any specification provided in your CAD drawings. We also offer engineering support to help optimize the layout for load and safety compliance.
Yes, all NJMM products are manufactured under strict ISO9001:2015 quality management. We hold CE certification and can manufacture to meet OSHA (USA), BS4592 (UK), and YB/T4001 (China) standards depending on your project location.
Jiulong
