High-tensile SS400 grade steel optimized for seismic zones.
Non-slip serrated surface tailored for Japan's heavy industry.
Designed for Tokyo Bay petrochemical refineries and power plants.
JIS G3101 compliant fabrication for reliable safety performance.
The Japanese industrial market represents one of the most demanding environments for structural steel components globally. With a unique combination of high seismic activity, a concentration of coastal industrial zones, and a rigorous adherence to the Japanese Industrial Standards (JIS), stair tread suppliers must deliver more than just a product; they must provide a certified engineering solution.
Japan is currently undergoing a "Green Transformation" (GX), where aging infrastructure in cities like Osaka and Yokohama is being retrofitted with sustainable, long-lifecycle materials. Stair treads produced by NJMM are designed to integrate seamlessly into these modernization projects, offering a 50-year service life even in C5-M high-corrosion environments.
Annual Metric Tons Output
Compliance Standard
Quality Certified
Auto-Welding Lines
Integration of robotic precision welding and laser-cut digital control panels ensures that every JT series tread meets sub-millimeter tolerances required for modular Japanese plant construction.
Our technical roadmap includes the reduction of carbon footprint during the hot-dip process, aligning with Japan’s 2050 Carbon Neutrality goal.
Research into flexible end-plate designs that allow for structural displacement during seismic events without compromising the safety of the stairway.
Ningbo Jiulong Machinery Manufacturing Co., Ltd (NJMM), founded in 1993, stands as a titan in the engineering and manufacturing of steel grating, railings, and light steel structures. We are a modern comprehensive enterprise integrating scientific research, machinery manufacturing, and large-scale engineering construction.
With two massive production bases in East and North China, our infrastructure includes 12 automated steel grating welding lines and cutting-edge auxiliary equipment like laser cutting and digital tailoring robots.
450,000 m² of production space dedicated to excellence and precision engineering.
ISO9001:2015, ISO45001:2018, CE, and GHOST certifications. We draft the standards others follow.
Service networks spanning 30+ countries with specialized localized support for the Japanese market.
Recommended: JG255/30/100. Essential for ventilation and explosion-proof safety in gas plants.
Recommended: G505/30/100. High-load capacity for Tokyo and Kobe port terminals.
Effective drainage and anti-slip surfaces for municipal waterworks and paper industries.
Navigating the Japanese market requires deep expertise in local regulations. NJMM provides full documentation support, including material certificates (Mill Test Reports), galvanization thickness verification, and structural calculation sheets often required by Japanese general contractors (Super Zenecon).
For multinational firms operating in Japan, we offer a centralized procurement model. Our logistics team handles the complexities of JIT (Just-In-Time) delivery to construction sites across Hokkaido to Okinawa, ensuring that project timelines are never compromised by supply chain delays.
A: Yes, all our steel products for the Japan market are manufactured using SS400 grade steel as per JIS G3101 standards, ensuring appropriate chemical composition and mechanical properties.
A: For coastal environments, we recommend hot-dip galvanizing according to JIS H8641 (HDZ55), which provides a minimum coating mass of 550g/m² to 610g/m² for maximum durability.
A: Absolutely. Our digital tailoring robots allow us to produce bespoke stair treads and gratings based on your specific CAD drawings, including non-standard nosing and end-plate requirements.
A: Our stair treads feature reinforced end-plates and specialized welding patterns that have been tested to withstand high-stress load cycles, characteristic of seismic activity in Japan.
Jiulong
