Premium grade, CE-certified galvanized steel stair treads and custom industrial floor gratings.
In structural engineering and industrial floor design, CE Certification is not merely a bureaucratic checkbox. It represents standard compliance with European Construction Products Regulation (CPR) 305/2011, indicating that the steel grating products comply with strict mechanical load capacity, structural safety, durability, and fire resistance standards. Specifically, for steel structures, the relevant standards encompass EN 1090-1 (Execution of steel structures and aluminium structures) and EN ISO 1461 (Hot dip galvanized coatings on fabricated iron and steel articles).
When sourcing standard grating sizes, engineers and global procurement officers must ensure that the manufacturer provides a comprehensive Declaration of Performance (DoP). This document lists critical structural thresholds, including the maximum allowable span, bending resistance, deflection limits under nominal live loads, and the exact characteristics of the structural steel grades utilized (typically S235JR or S355JR according to EN 10025). Purchasing certified products guarantees that industrial platforms, escape stairs, and civil walkways maintain safety integrity even under severe environmental or dynamic stress.
CE Certification guarantees that the factory's production control (FPC) system is continuously audited by a notified body. This verifies that materials undergo strict weld penetration checks, dimensional verification, and chemical composition traceabilities.
Standard engineering grids based on optimal span-to-weight ratios to maximize loading performance and minimize installation cost.
| Standard Model Designation | Bearing Bar Size (Height x Thickness) | Bearing Bar Pitch (Center-to-Center) | Cross Bar Pitch | Standard Panel Size (Width x Length) | Primary Recommended Application |
|---|---|---|---|---|---|
| JG255/30/100 | 25 mm x 5 mm | 30 mm | 100 mm | 1000 mm x 5800 mm | Lightweight Walkways, Residential Catwalks, Maintenance Access Platforms |
| JG325/30/100 | 32 mm x 5 mm | 30 mm | 100 mm | 1000 mm x 6100 mm | Petrochemical Plants, Refinery Walkways, General Manufacturing Flooring |
| JG405/30/100 | 40 mm x 5 mm | 30 mm | 100 mm | 1000 mm x 6100 mm | Heavy Industrial Areas, High-Span Platform Walkways, Port Equipment Decking |
| JG505/30/100 | 50 mm x 5 mm | 30 mm | 100 mm | 1000 mm x 6000 mm | Mining & Refining Facilities, Offshore Drilling Rig Platforms, Equipment Skids |
| JG705/30/100 | 70 mm x 5 mm | 30 mm | 100 mm | 1000 mm x 5800 mm | High Loading Capacity Drainage Channels, Airport Hangar Service Areas |
| JG806/30/100 | 80 mm x 6 mm | 30 mm | 100 mm | 1000 mm x 6000 mm | Military Logistics Platforms, Shipyards, Heavy Machinery Protection Access |
Our platform grating uses certified carbon steel, which is hot-dip galvanized in compliance with international standards. This coating provides superior anti-corrosion properties, maintaining structural safety even in highly humid, chemical, or coastal conditions.
Designed with either plain or serrated surface textures to guarantee optimal safety grip. Serrated profiles provide excellent slip protection (achieving R13 ratings under specialized testing frameworks) in presence of mud, ice, or oil spillage.
By relying on computer-aided structural design, our CE-compliant dimensions minimize structural weight without compromising load ratings. This lowers carbon intensity per square meter and reduces support steel material costs.
Founded in 1993, Ningbo Jiulong Machinery Manufacturing Co., Ltd (NJMM) is a modern comprehensive enterprise integrating scientific research and design, machinery manufacturing, and engineering construction. We market our products to South America, Europe, Oceania, Africa, West Asia, Southeast Asia, the Middle East, and beyond. In China, our "Longta" steel grating is widely applied to renowned projects nationwide.
Ensuring compliance across diverse global markets through customized specifications and dedicated regional engineering support.
In Europe, standard sizes like 30x100 mm pitch with 30x3 mm or 32x5 mm bearing bars are widely utilized on petrochemical platforms and emergency egress stairs. Strict adherence to EN ISO 14122 (Safety of machinery - Permanent means of access to machinery) dictates the deflection limits and ball-proof test requirements, which prevent small tools from falling through the grating mesh.
For projects operating under ANSI/NAAMM MBG 531-17 standards, grating sizes are specified in inches (e.g., 19-W-4 spacing). We design and manufacture bespoke runs corresponding perfectly to these specifications, with complete engineering calculations detailing concentrated live load and uniform load capacity under ASTM steel grade standards.
Highly corrosive environments such as offshore drilling platforms in the Middle East require heavy-duty specifications (e.g., JG405/30/100 or JG505/30/100) paired with advanced hot-dip galvanization layers exceeding 85 microns thickness (meeting ISO 1461 requirements). This prevents premature rust formation and mechanical fatigue under salty ocean spray.
Global structural steel procurement relies heavily on efficiency, throughput volume, and quality verification. As a leading manufacturer based in Ningbo, China, NJMM runs 2 major production bases (covering 450,000 m² of ground area with 30,000 m² of dedicated workshop space). Equipped with 12 self-developed automatic pressure welding production lines and 6 sets of robotic banding systems, our facilities can process large quantities of raw structural steel rapidly.
Our integration with raw material suppliers minimizes geopolitical supply bottlenecks, while automated precision laser cutting and digital control panels guarantee standard sizes are within a tolerance of ±0.5 mm. Furthermore, our close proximity to Ningbo Port—one of the busiest shipping terminals worldwide—means direct, cost-efficient, and fast logistics dispatch to all global destinations.
Advancing safety, structural design, and ecological carbon footprint optimization through material engineering.
Developing next-generation structural platforms integrated with load-cell telemetry sensors to monitor structural deflection and fatigue stress in real-time, helping plant operators execute predictive maintenance cycles before catastrophic failures occur.
Transitioning manufacturing processes to align with the European Carbon Border Adjustment Mechanism (CBAM). By sourcing hydrogen-reduced green steel and optimizing electricity usage via factory solar installations, we aim to lower carbon intensity by 30% by 2028.
Researching advanced hybrid coatings to supplement traditional hot-dip galvanizing. These composite nano-coatings provide superior resistance to strong acids and extreme alkaline fluids, extending the service life of flooring installations past 50 years.
Our commitment to quality is backed by certified international audit compliance and raw chemical verification standards.
NJMM obtained the ISO9001:2015 Quality Management System Certification, ISO45001:2018 Occupational Health System Certification, and ISO14001:2015 Environmental Management System Certification. We also participated in drafting and revising the national steel grating standard of YB/T4001 in 2019. In 2020, we were declared a municipal high-tech engineering center, and in 2021, we were included in the cultivation pool of specialized new enterprises.
Real-world engineering installations showing our standard and customized pressure welded steel gratings in heavy industrial services.
Supply of JG325/30/100 galvanized platforms for main pipe racks. Provided high windage tolerance and structural rigidity for high-altitude worker walkways.
Implementation of corrosion-resistant acid platforms with serrated anti-skid steel steps to ensure continuous occupational safety under fluid spill conditions.
High loading capacity equipment decks utilising custom heavy duty bar thickness (JG505/30/100) to support mechanical machinery maintenance loads.
Trusted by engineering firms, global contractors, and industrial developers across 60+ countries.
Direct technical answers addressing installation clearances, load calculations, and regulatory compliance.
Explore our range of matching accessories, handrails, and industrial walkway configurations.
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