Overview
The Escalator Frame For Steps is the core load-bearing structural chassis engineered to support individual steps, mechanical drive chains, and passenger weight during continuous vertical transit.
Technical Specifications
|
Category |
Specification |
|
Main Structural Profiles |
Channel steel / Square Hollow Section (HSS) / Thick-walled angle profiles |
|
Applicable Structural Height |
3.0 m – 25+ m customized |
|
Step Width Compatibility |
600 mm / 800 mm / 1000 mm |
|
Welding Standard |
EN ISO 3834-2 compliant welding process |
|
Surface Protection Options |
Zinc-rich epoxy primer (60–80 μm) / Hot-dip galvanizing (ISO 1461) |
|
Structural Deflection Limit |
≤ 1/1000 of span under maximum static load |
Product Specifications
|
Category |
Key Specification |
|
Material Grade |
S235JR / S355JO structural carbon steel |
|
Load Capacity |
Up to 5,000 N/m² dynamic load resistance |
|
Structural Deformation Control |
Deflection ≤ L/750 under full load |
|
Reinforcement Design |
Dual-side structural reinforcement plates |
|
Surface Protection |
Hot-dip galvanization ≥ 85 μm zinc coating |
|
Service Life |
≥ 150,000 operating hours under full load |
|
Structural Integrity Focus |
Weld stability + anti-cracking design |
Custom Engineering & OEM Service
Engineering Software: Structural validation against EN 115-1 dynamic load simulation models and non-linear FEA under critical passenger-load cases.
OEM Compatibility: Drop-in replacement frames engineered to interface directly with existing Otis, Schindler, Kone, and Thyssenkrupp wellway structural connections, eliminating on-site hot work during modernization.
Turnaround Time: Approval-ready STEP models delivered within 7 business days following initial parameter verification.
Restricted Access Solutions: Multi-segment, bolt-together split truss systems designed for narrow wellways or job sites with limited physical crane access.
Digital Integration: Native STEP, IGES, or BIM files supplied for direct import into architectural project models.
Manufacturing Capabilities
Robotic Welding: 4 automated lines equipped with Panasonic six-axis welding robots; all personnel hold active EN ISO 9606-1 and AWS D1.1 certifications.
Precision Milling: 12-meter CNC gantry milling machines ensuring guide rail mounting surface parallelism within ±0.5 mm.
Production Capacity: A monthly capacity of 900 metric tons with a dedicated welding line throughput of 15 units per shift, utilizing structured takt time controls to guarantee delivery.
MOQ: Minimum order volume specified at 10 metric tons or 5 custom structural units per manufacturing batch.
Quality Assurance
NDT Testing: 100% of critical structural load welds undergo Ultrasonic Testing (UT) and Magnetic Particle Inspection (MPI).
Dimensional Accuracy: Verified via Hexagon 3D Laser Trackers to guarantee overall geometric alignment within ±0.2 mm per 10 meters.
Corrosion Resistance: Validated via ASTM B117 720-hour salt spray testing to reduce structural maintenance overhead in coastal and underground subway networks.
Material Traceability: 100% heat-number traceability linking every structural steel batch to its Mill Test Certificate (MTC) per EN 10204 3.1.
Fatigue Testing: On-site rigs simulate up to 2.5 million operational cycles under variable load configurations.
Third-Party Validation: Independent inspection reports from SGS or TÜV Rheinland are provided with every manufacturing batch.
Global Compliance
International Safety Codes: Full compliance with EN 115-1:2017 (Europe) and ASME A17.1 (US) safety rules for escalators.
Factory Certifications: Operations certified to ISO 9001:2015 (Quality), ISO 14001:2015 (Environmental), and ISO 45001:2018 (Health & Safety).
Structural Welding Qualification: Certified under EN 1090-2 Execution Class 3 (EXC3), qualifying our structures for high-fatigue dynamic loads in public transit infrastructure with full CE marking.
Supply Chain Audits: Facilities undergo annual independent SMETA 4-pillar or BSCI social accountability audits.
Warranty & Technical Response: Backed by a 36-month structural warranty with a guaranteed 24-hour engineering response for field alignment troubleshooting.
FAQ
Q: What is the typical service life in real operating environments?
A: In metro and commercial mall installations, the frame typically operates 8–12 years before major structural refurbishment is required. In high-humidity underground systems, inspection intervals are shortened due to accelerated weld fatigue accumulation.
Q: What third-party validation is included with each shipment?
A: Every batch ships with SGS or TÜV Rheinland inspection reports, EN 10204 3.1 mill certificates, UT/MPI weld records, and salt spray test results - sufficient for most transit authority structural approval submissions.
Q: Can the frame be installed without hot work or welding on-site?
A: OEM-compatible frames use pre-drilled bolt connections matching existing Otis, Schindler, Kone, and Thyssenkrupp wellway anchor points, eliminating on-site hot work permits and reducing installation risk.
Q: What is the maximum allowable installation misalignment during frame assembly?
A: Lateral installation tolerance is controlled within ±1.2 mm per 10 meters, while vertical deviation is limited to ±0.8 mm.
Q: Can the frame be installed in segmented form for restricted-access buildings?
A: Yes, split-frame configurations allow installation in segments as small as 1.2–1.5 meters. Modules are bolted on-site using pre-aligned positioning dowel systems to ensure structural continuity.
Q: What is the standard weight limit per section for on-site lifting?
A: Each modular section is designed not to exceed 1.8 tons, allowing installation with standard 2–3 ton service cranes.
Q: Which components require the most attention during lifecycle maintenance?
A: Reinforcement weld zones near step chain guide rails are the primary inspection focus every 12 months. Secondary attention goes to bolt preload loss in modular joint sections after 3–5 years of operation.
Q: What is the failure prevention strategy for weld fatigue in high-load zones?
A: Critical weld zones feature dual-pass reinforcement and stress redistribution geometry, reducing peak stress concentration by approximately 18–22%. These areas are re-inspected via ultrasonic scanning every 24 months in high-traffic installations.
Q: How does the system handle long-term corrosion in underground environments?
A: Hot-dip galvanized coatings typically retain effective corrosion resistance for 10–15 years depending on humidity and cleaning frequency. Additional epoxy topcoats extend maintenance intervals in salt-exposed regions.
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