Ningbo Jiulong Machinery Manufacturing Co., Ltd (NJMM), established in 1993, has emerged as a titan in the global steel structure industry. With a heritage spanning over three decades, we specialize in the engineering, design, and manufacturing of high-performance serrated bar grating, stair treads, and light steel structures. Our commitment to the E-E-A-T principle is reflected in our robust infrastructure: two massive production bases in East and North China, operating 12 automated pressure welding lines, and reaching an annual capacity exceeding 50,000 metric tons.
Square Meters Production Area
Auto Welding Product Lines
Annual Tonnage Capacity
Years of Engineering Experience
The global demand for Serrated Bar Grating is undergoing a paradigm shift. Historically viewed as a simple flooring solution, modern industrial environments now treat grating as a safety-critical component. Serrated grating, characterized by its "saw-tooth" profile, is engineered for maximum slip resistance in high-risk environments involving oils, chemicals, and moisture.
Introduction of precision-serrated profiles that exceed standard friction coefficients, essential for offshore platforms and petrochemical plants.
Transitioning from basic zinc coating to high-purity Hot-Dip Galvanization that ensures 50+ years of life in corrosive environments.
Suppliers now provide 3D CAD and Revit models, allowing for seamless integration into complex structural architectural designs.
In an era of supply chain volatility, NJMM leverages Industry 4.0 methodologies to ensure reliability. Our factory integrates robotic welding systems, laser precision cutting, and digital control tailoring to produce gratings that meet international standards like YB/T4001, BS4592, and ANSI/NAAMM (MBG531).
From deep-sea drilling to urban infrastructure, serrated grating is the silent guardian of worker safety.
High-serration JG series (JG325/30/100) are recommended for walkways where spillages are common, providing critical drainage and lighting.
Designed for extreme salt-spray conditions. Our gratings are widely used in shipbuilding, offshore engineering, and port terminals.
Serrated forge welded bar grating offers a modern aesthetic for ceilings, ventilation screens, and high-tech parking facilities.
When procuring wholesale serrated bar grating quotes, buyers must understand the structural trade-offs. While plain bar grating is cost-effective for dry areas, serrated grating is mandatory in 70% of industrial safety specifications. The serration depth and pitch directly influence the Dynamic Coefficient of Friction (DCOF).
NJMM's serrated products are manufactured through a specialized pressure-welding process where the cross bars are fused into the serrated bearing bars. This creates a monolithic structure that doesn't just hold weight—it resists lateral forces.
Quotes are primarily driven by steel raw material market prices, the thickness and height of bearing bars (e.g., 25mm to 100mm), the density of the grid (pitch), and the specific type of finish (Hot-dip galvanizing vs. untreated).
NJMM offers a combination of scale and precision. With 12 auto-lines and 50,000-ton capacity, we offer significant cost advantages due to supply chain integration, combined with international quality certifications like CE and ISO.
Plain grating has flat bearing bars and is suitable for general applications. Serrated grating features notches in the bearing bar to provide extra grip, making it essential for oily, icy, or wet environments.
Yes, our engineering team provides detailed shop drawings and installation layouts to ensure the grating fits perfectly around pipes, columns, and equipment.
Choosing a supplier for wholesale serrated bar grating is a decision that affects the safety and longevity of your industrial facility. NJMM does not just manufacture products; we provide comprehensive engineering solutions. Our vision is to be the leader in the steel grating market, a preferred global supplier, and a responsible corporate citizen.
With certificates ranging from ISO9001:2015 to CE and GHOST, NJMM ensures every ton of steel delivered meets the highest international benchmarks. Whether you are building a platform walkway in a petrochemical plant or a ditch cover for a mining facility, our expertise in high-load capacity and anti-corrosion finishes ensures your project is built to last.
Jiulong
