In modern industrial architecture, Steel Grating Twisted Bars (cross bars) serve as the backbone of forge-welded structures. Unlike plain cross bars, the twisted design provides enhanced mechanical interlocking and slip resistance, vital for high-altitude walkways and heavy-load industrial platforms.
Compliance is not just a label; it's a guarantee of safety. As a leading Steel Grating Factory, our CE certification ensures that every unit meets the stringent European safety, health, and environmental protection requirements (EN 1090), facilitating seamless export to global markets.
Utilizing high-voltage resistance pressure welding, our 12 automated lines fuse the twisted bars into the bearing bars under 200 tons of pressure, creating a permanent, single-unit structure that eliminates the risk of joint failure common in manual welding.
The demand for high-quality steel grating with twisted bars has seen a 15% CAGR in sectors such as renewable energy and offshore mining. Procurement officers now prioritize "Information Gain"—seeking suppliers who provide detailed load-bearing data, lifecycle analysis, and environmental impact reports.
| Industry Segment | Procurement Requirement | Twisted Bar Solution | Strategic Benefit |
|---|---|---|---|
| Offshore Oil & Gas | High Corrosion Resistance | Hot-dip Galvanized Twisted Cross Bars | 25+ Years Maintenance-Free Life |
| Urban Infrastructure | Pedestrian Safety (Anti-Slip) | Twisted Bar + Serrated Surface | R13 Slip Resistance Rating |
| Power Plants | Maximum Ventilation | Optimized Mesh Size (30x100mm) | Efficient Heat Dissipation |
| Data Centers | Heavy Static Load Bearing | Deep Bearing Bar + High-Tension Cross Bars | Structural Stability for Cooling Units |
Ningbo Jiulong Machinery Manufacturing Co., Ltd (NJMM) is more than a manufacturer; we are a global partner in engineering. Our 30-year journey has led us to become the primary drafter of the YB/T4001 Steel Grating Standard.
NJMM operates two massive production bases with workshop areas exceeding 30,000 square meters. Our facility features 6 sets of automatic banding robots and 2 sets of irregular grating fabrication platforms, ensuring that even the most complex geometric designs are executed with sub-millimeter precision.
We hold ISO9001:2015, ISO45001:2018, and ISO14001:2015 certifications. Our testing facilities include tensile testing machines, zinc coating thickness gauges, and load-test rigs to ensure every shipment meets the "Longta" brand promise of excellence.
In refineries, ventilation and light penetration are critical for safety. Our twisted bar grating (JG325/30/100) provides the perfect balance between light passage and structural strength, preventing the accumulation of hazardous gases.
Saltwater environments demand superior protection. We utilize a specialized hot-dip galvanizing process that exceeds ASTM A123 standards, providing a zinc coating thickness of 85 microns or more to ensure longevity in offshore wind and drilling platforms.
From airport maintenance docks to heavy-duty truck wash platforms, our stair treads with non-slip nosing and twisted bar cross-members ensure worker safety even in wet or oily conditions.
NJMM is committed to a "Green Factory" initiative, integrating AI into our manufacturing workflow to reduce carbon footprint and increase material efficiency.
Implementing machine vision on our auto-welding lines to detect weld penetration depth and cross-bar alignment in real-time. This reduces waste and guarantees 100% adherence to structural specifications.
Partnering with Tier 1 steel mills to source low-carbon steel produced via Electric Arc Furnaces (EAF). Our roadmap includes providing Environmental Product Declarations (EPDs) for every project by 2026.
Offering BIM (Building Information Modeling) objects for our grating products, allowing architects to simulate load behavior and drainage efficiency within a virtual 3D environment before construction starts.
With a service network covering South America, Europe, Oceania, and Southeast Asia, NJMM provides local engineering support that speaks your language. Our documentation package includes:
Twisted bars provide superior grip and anti-slip properties. During the forge-welding process, the square twisted bar is pressed into the bearing bar, creating a stronger mechanical bond and a more rigid structure compared to standard round bars.
Our galvanizing process follows ISO 1461 and ASTM A123 standards. We perform pickling and fluxing to ensure the steel surface is pristine before immersion in 99.9% pure molten zinc at 450°C, resulting in a metallurgical bond that won't flake or peel.
Absolutely. We specialize in bespoke fabrication. Our digital control panel tailoring and laser cutting equipment allow us to manufacture gratings of any shape—circular, trapezoidal, or with complex cut-outs—ready for immediate installation.
With 12 automated production lines and a 50,000-ton annual capacity, we offer industry-leading lead times. Standard orders are typically ready for shipment within 14-21 days of technical drawing approval.
Jiulong
