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Crane Rail Introduction

2025-08-13 17:45:39

Crane rail (also known as crane track) is a specialized rail system designed to provide a running path for cranes (such as overhead cranes, gantry cranes, etc.), ensuring that cranes can move smoothly and safely. Below is an introduction to the QU series of crane rail.

QU Series Crane Rail Standard System

Chinese standard: GB/T 11264-2012 (replacing the old YB/T 5055)

International benchmarking: ISO 1834:2018, ISO 6303:1980

European standard: DIN 536 (Series A)

American Standard: ASCE/AAR Standard

Objective: JIS E1101 (CR series)

International Standard Comparison of QU Crane Rail

    China Europe United States Japan
    QU70 A65 ASCE25 CR60
    QU100 A100 ASCE60 CR80
    QU120 A120 ASCE85 CR100

    Comparison of QU Model Crane Rail Parameters

    Model Section dimensions (mm) Theoretical weight (kg/m) Applicable lifting capacity （ton） Head width (mm) Waist thickness (mm)
    QU70 70*70 33.3 Less or equal 10t 50 25
    QU80 80*80 43.5 10-20t 60 28
    QU100 100*100 68.2 20-50t 70 32
    QU120 120*120 98.3 50-100t 80 38

    Part of QU Crane Rail Drawings

    QU70 crane rail drawing
    QU70 crane rail drawing
    QU80 crane rail drawing
    QU80 crane rail drawing
    QU100 crane rail drawing
    QU100 crane rail drawing

    Key Structural Features of QU Crane Rail

    1. Head Design: Large-radius arc transition, reducing rim wear
    2. Waist reinforcement: Thickened cross-section design, bending modulus increased by 30%+
    3. Bottom optimization: Wide-bottom structure, better installation stability

    Material Technical Requirements of QU Crane Rail

    1. Chemical Composition

    • C: 0.65–0.80%
    • Manganese: 0.70–1.20%
    • P/S: ≤ 040%

    2. Mechanical properties

      • Tensile strength: ≥ 880 MPa
      • Hardness: 260–300 HB
      • Impact energy: ≥ 27 Joules (-20℃)

      Installation Technical Specifications of QU Crane Rail

      1. Basic Requirements

      • Concrete strength ≥ C30
      • The tensile strength of the embedded bolts is 8.8 grade.

      2. Installation tolerance

      • Track gauge deviation: ±3 mm
      • Levelness: ≤ 1/100
      • Joint misalignment: ≤ 0.5 mm

      Special Processing Techniques of QU Crane Rail

      • Heat treatment: Surface quenching of the rail head, hardness gradient control (surface hardness ranging from 58 to 62 HRC, with the core maintaining toughness)
      • Antifungal treatment: Hot-dip galvanizing: Zinc layer ≥ 86 μm or Arc spraying of aluminum: Aluminum layer ≥ 150 μm

      Maintenance Inspection Standards of QU Crane Rail

      1. Wear limit

      • The wear of the rail head width is no more than 15%
      • Rail height wear ≤ 10%

      2. Inspection cycle

        • Regular environment: 6 times per month
        • Recharge frequency: 3 times per month

        Conclusion

        In conclusion, the selection of the crane rail is an indispensable part of a perfect crane solution. An appropriate rail not only helps to save costs but also protects the wheels and extends their service life. So, if you encounter any questions regarding the selection of crane rails, please directly contact the relevant factories to seek their advice. Henan Dejun Industry Co., Ltd has more than 30 years in crane filed, we have enough confidence to provide the top quality crane and suitable solution, any questions, contact us freely, our team always here!

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