Precision-engineered hot-dip galvanized steel treads tailored for high-load platforms, chemical plants, and port infrastructure across East Java.
Surabaya, as the economic engine of East Java and Indonesia’s second-largest metropolitan area, stands at the epicenter of maritime commerce, heavy manufacturing, and infrastructure modernization. Anchored by the major deep-water hub of Tanjung Perak Port and neighboring industrial corridors such as the SIER (Surabaya Industrial Estate Rungkut), Gresik Chemical & Fertilizer Belt, and Teluk Lamong Terminal, regional facilities operate under extreme operational stress.
The tropical coastal climate of East Java exposes industrial catwalks, access stairways, and high-altitude platforms to constant high ambient humidity, aggressive salt-spray corrosion, and heavy mechanical wear. Standard mild steel solutions suffer rapid oxidation, structural fatigue, and severe slip-and-fall hazards. To meet rigorous international safety standards (such as ISO 14122-3, OSHA 1910.24, and AS/NZS 1657), EPC contractors, plant managers, and structural engineers in Surabaya require structural steel stair treads built with heavy-duty anti-slip nosing, hot-dip galvanization exceeding 610 g/m², and verified load-bearing capacity.
Founded in 1993, Ningbo Jiulong Machinery Manufacturing Co., Ltd (NJMM) is a global pioneer in the design, automated production, and technical delivery of steel grating, industrial stair treads, handrails, and heavy steel structure components. Integrating advanced scientific research, robotics, and international EPC project management, NJMM sets the standard for industrial flooring solutions worldwide.
Operating 2 mega-scale manufacturing hubs across Eastern and Northern China with a dedicated 30,000 m² heavy-structure workshop. Equipped with 12 self-developed automatic pressure welding equipment lines and 6 sets of automated banding robot units for extreme precision.
Certified under ISO9001:2015 Quality Management, ISO14001:2015 Environmental Management, and ISO45001:2018 Occupational Health Systems. Fully compliant with EU CE mark standards and GOST certification. Key participant in revising the Chinese National Steel Grating Standard YB/T4001.
By combining high-speed automated electro-forge welding with massive raw steel procurement advantages, NJMM delivers up to 25-35% cost savings for Surabaya buyers compared to regional traders while guaranteeing zero defects.
Understanding the structural variations of industrial stair treads available for installation across Surabaya facilities.
| Type / Model | Fixing Method | Front Nosing Profile | Primary Industrial Application | Anti-Slip Rating |
|---|---|---|---|---|
| JT1 (T1 Standard) | Direct Welding to Stringer | No Front Nosing (Plain Edge) | General maintenance platforms, low-traffic elevated walkways | Standard Plain / Serrated |
| JT2 (T2 Standard) | Bolted Connection (End Plates) | No Front Nosing (Plain Edge) | Demountable staircases, temporary scaffolding towers | Standard Plain / Serrated |
| JT3 (T3 Standard) | Direct Welding to Stringer | Checkered Plate Nosing | Heavy industrial plants, high-contrast visual edge requirement | High Slip Resistance |
| JT4 (T4 Standard) | Bolted Connection (End Plates) | Checkered Plate Nosing | Power plants, Surabaya port cranes, chemical refinery stair towers | High Slip Resistance |
| JT5 (T5 Anti-Slip) | Direct Welding to Stringer | Perforated Anti-Slip Strip | Offshore oil & gas rigs, marine terminals with heavy oil exposure | Maximum Non-Slip (R12) |
| JT6 (T6 Anti-Slip) | Bolted Connection (End Plates) | Perforated Anti-Slip Strip | Palm oil processing mills, wet chemical processing lines | Maximum Non-Slip (R12) |
| JT7 (T7 Custom) | Direct Welding / Custom Brackets | Abrasive Nosing / Special Bar | Architectural industrial stairways, public utility platforms | Custom Specified |
| JT8 (T8 CE Rated) | Bolted Heavy End Plate | Checkered / Perforated Nosing | CE & ISO certified global export megaprojects | Certified ISO Standard |
Providing durable, corrosion-resistant, and high-load stair flooring for East Java’s core industrial sectors.
Maritime environments demand superior hot-dip galvanizing to withstand salt spray and harsh ocean winds. NJMM stair treads provide long-term corrosion resistance for container crane catwalks, ship repair drydocks, and terminal elevated platforms.
Exposure to volatile chemicals, acids, and slick lubricants requires maximum anti-slip safety. Our serrated forge-welded steel treads ensure worker stability on high-altitude chemical towers and tank farm access ladders.
Designed for structural resilience under high vibration and heavy foot traffic in power generation facilities, biomass plants, and logistics parks across SIER and Sidoarjo industrial zones.
Direct international sourcing of structural steel grating and stair treads provides decisive commercial and technical advantages over buying from local intermediate traders. NJMM’s fully integrated supply chain delivers factory-direct pricing, guaranteed metallurgical quality, and complete customization options.
By eliminating middleman markups and leveraging automated scale production in Ningbo, contractors reduce CapEx substantially.
Our engineering department delivers detailed shop drawings, custom cutouts, and panel numbering for effortless field assembly in Surabaya.
Direct sea freight connection from Ningbo Port ensures rapid transit and predictable site delivery timelines for tight construction schedules.
Every batch of stair treads produced by NJMM undergoes strict mechanical laboratory testing prior to dispatch:
NJMM’s products are trusted by worldwide engineering firms and heavy industrial EPC leaders.
ISO9001 System
CE Compliance
ISO14001 Environmental
ISO45001 Health & Safety
Explore our full line of pressure-welded steel treads, serrated gratings, and industrial railings engineered for Surabaya projects.
Expert technical answers regarding structural specifications, galvanizing compliance, ocean shipping, and installation.
Direct container vessel sailings from Ningbo Port to Tanjung Perak Port (Surabaya) typically take 10 to 14 days in transit. NJMM handles all export customs clearing documentation, mill test certificates (MTC), and packing lists to ensure smooth clearance upon arrival at East Java ports.
Surabaya features a highly corrosive humid tropical marine environment, amplified by industrial sulfur and chemical emissions in zones like Gresik. NJMM applies hot-dip galvanizing compliant with ASTM A123 / ISO 1461 (minimum 85 μm / 610 g/m² zinc thickness), providing up to 30+ years of maintenance-free anti-corrosion barrier protection.
We recommend model JT4 or JT6 featuring serrated bearing bars combined with a perforated or checkered anti-slip front nosing. Serrated surfaces bite through grease, oils, and moisture to offer an R12 slip-resistance rating under international occupational safety standards.
Yes. NJMM operates 2 dedicated irregular grating fabrication platforms and digital CNC panel cutters. Our in-house engineering design team works with your CAD/BIM models to manufacture custom span lengths, bearing bar depths (e.g., 25mm to 65mm), bolt hole pitch spacing, and specialized side plate dimensions.
Each shipment includes ISO9001 Mill Test Certificates (MTC), EN 10204 3.1 chemical and mechanical test reports, Hot-Dip Galvanizing Thickness Test Certificates, and CE compliance documentation.
Contact NJMM’s technical engineering department today. Receive fast factory-direct pricing, 3D shop drawing reviews, and complete logistics support for Tanjung Perak delivery.
Jiulong
