EN 13013-7:2020 Bridge Crane End Carriage & Trolley Design
EN 13001-3-7:2020 — Design of End Carriages and Trolleys for Bridge Cranes is a key technical specification in the crane industry. Part of the EN 13001 series, this standard focuses specifically on the structural design of end carriages and trolleys for bridge cranes. It systematically defines calculation methods for end carriage stiffness and strength, track gauge tolerances, wheel block installation requirements, and horizontal guide roller design parameters. The standard applies to the structural design of end carriages and trolleys for general purpose bridge cranes.
The standard provides a unified technical basis for design personnel, inspection bodies, and end users. Kelude strictly implements the technical requirements of this standard throughout its product development and manufacturing processes, ensuring compliance and reliability of all equipment.
Scope and Application of the Standard
EN 13001-3-7:2020 — Design of End Carriages and Trolleys for Bridge Cranes — specifies the technical requirements and safety indicators for crane bridge end structures, covering all lifting appliances with a rated lifting capacity above 0.5 t. The standard applies not only to the design and manufacturing of new equipment but also provides clear technical guidance for the inspection, maintenance, and modification of cranes already in service. As a critical component of the crane standard system, it aligns with other parts of the EN 13001 series and ISO 4309 Wire Rope Inspection Standard, forming a comprehensive framework of technical specifications. The clearly defined technical parameters and safety factors give design personnel a solid design basis, while also providing quantifiable acceptance criteria for type tests and factory inspections conducted by third-party inspection bodies.
Core Technical Parameters
Under EN 13001-3-7:2020, the design and manufacturing of bridge crane end carriages and trolleys must satisfy a rigorous set of technical parameters. These values are established from extensive test data and safety engineering principles, covering everything from material selection to structural design. The safety factors specified in the standard account for fatigue life and limit load conditions under demanding operating environments. In practical engineering applications, design personnel select appropriate parameter combinations based on the equipment's work duty, load spectrum, and operating environment. The parameter cards below summarize the core technical indicators of the standard:
Comparative Analysis of Key Parameters
The comparison table below systematically contrasts the core parameters specified in EN 13001-3-7:2020 with common engineering practice. All values shown are either mandatory or recommended clauses of the standard and should be strictly implemented during design and selection as well as factory acceptance testing.
| Item | technical requirements | Description |
|---|---|---|
| End Carriagevertical stiffness | Full-load deflection≤L/1000 | Mid-span Concentrated Loadoperating conditions |
| Trolley Track Gauge Tolerance ±3mm | ±3mm(End-span)/±5mm(Mid-span) | Temperature Differential Correction±0.1mm/m.℃ |
| Maximum Wheel Load Calculation | Static Wheel load×Impact allowance(1.1~1.4) | Including Trolley Eccentric Load+Crane Bridge Flatness Factor |
| Horizontal Guide Roller | Lateral Clearance2~5mm | and Crane Rail Side Contact, minimum2mm |
| Connection bolt | 10.9Class Friction Type High-Strength Bolt | Torque Per GB/T 1231, Final Tightening Re-inspection |
| End Carriage Butt Weld | 100%UT+20%MT | ICategory Weld Seam Evaluation Grade BGrade |
Inspection Requirements and Intervals
EN 13001-3-7:2020 sets out clear requirements for the Factory Acceptance Test, Type Test, and periodic inspection of Bridge Crane End Carriages. The Factory Acceptance Test must be carried out on every unit at the manufacturer's facility by the quality inspection department. Each unit that passes the test must be accompanied by a detailed inspection report and a Certificate of Conformity. For cranes already in service, the periodic inspection interval is determined by the work duty and operating environment, and generally must not exceed 12 months.
| Item | technical requirements | Description |
|---|---|---|
| End Carriage Deflection | Full-load deflection Measurement | Annual+≤L/1000 |
| Track Gauge / Rail Gauge Measurement | End-span/Mid-span Track Gauge / Rail Gauge | Quarterly+±3/±5mm |
| bolt torque | High-Strength Bolt Torque Re-verification | Annual+10%Sampling Inspection, Under-tightening Re-tightening |
| Wheel Block | Tread surface Wear+Wheel flange Thickness | Quarterly+Wheel flange≥Original Thickness50% |
| Horizontal Guide Roller | Lateral Clearance+Wear | Quarterly+Lateral Clearanceadjustment2~5mm |
Safe Operation and Management Requirements
Under EN 13001-3-7:2020, safe operation and routine management are critical to crane reliability. The standard places strong emphasis on operator qualification and training, requiring all operators to complete specialized training and hold the appropriate certifications before operating equipment. User units must establish a comprehensive equipment file management system that documents the full installation, use, maintenance and inspection lifecycle. Any safety hazards identified must be addressed through the rectification procedure specified in the standard, ensuring the equipment remains safe and controllable at all times. The standard also imposes restrictive requirements on equipment use under extreme operating conditions.
FAQ
Q: What are the end carriage stiffness requirements under EN 13001-3-7?
A: The standard requires that the vertical deflection of the end carriage under full-load conditions must not exceed 1/1000 of its span (L/1000). For an end carriage with a 4 m span, the maximum allowable deflection is 4 mm. The connection strength between the end carriage and the main girder must be at least equal to the load capacity of the main girder, typically achieved through high-strength bolted connections or welded joints. The end carriage cross-section must be designed with adequate torsional stiffness to prevent torsional deformation caused by rail irregularities during crane bridge travel. The height difference between the two ends of the end carriage must not exceed 2 mm; otherwise, uneven loading on the crane bridge wheels and rail gnawing may occur. Kelude uses finite element analysis to optimize the end carriage cross-section, ensuring stiffness meets the standard requirements.
Q: What are the control tolerances for trolley rail gauge?
A: The standard requires a track gauge tolerance of ±3 mm at the rail ends and ±5 mm at mid-span. Thermal expansion and contraction due to ambient temperature variations must also be considered, with a temperature correction coefficient of ±0.1 mm/m·°C. The flatness of the rail mounting surface must be within ±2 mm/m, with a maximum deviation of ±5 mm over the full rail length. Rail joints should be positioned near the end carriage support points, with joint misalignment limited to ≤1 mm. Clamp plate spacing must not exceed 500 mm, and the clamping plates must fit securely against the rail web. After trolley rail installation, the track gauge should be measured segment by segment using a laser measuring instrument, with recorded data kept for archival storage.
Q: What is the function and design specification of horizontal guide rollers?
A: Horizontal guide rollers are essential components that prevent rail gnawing during crane bridge travel. The standard requires a lateral clearance of 2–5 mm. The minimum contact clearance between the guide roller and the rail side is 2 mm, with a maximum of 5 mm. The tread surface hardness of the guide roller must reach HB300–380, consistent with the hardness of the crane wheel tread. Guide rollers must be replaced when wear exceeds 10% of the original diameter. Proper guide roller clearance effectively reduces wear on both the wheel flange and the rail side, extending the service life of the crane travel mechanism. Two horizontal guide rollers are installed at each end of the end carriage, with clearance precisely adjusted and locked before factory delivery.
Q: What are the technical requirements for high-strength bolted connections?
A: The standard requires that connection bolts between the end carriage and the main girder be Class 10.9 friction-type high-strength bolts, with installation torque applied in accordance with GB/T 1231. During installation, bolts must first be snug-tightened (50% of final tightening torque) and then fully tightened to the final torque, with alignment marks applied after tightening. The slip factor of the prepared friction surfaces must not be less than 0.45. Annual inspections must include torque verification on no less than 10% of installed bolts; any bolts found under-tightened must be re-tightened to the specified value, while over-tightened bolts must be replaced. High-strength bolt installation is controlled using a torque wrench combined with the angle-control method, and installation records are kept for archival storage.
— Specialized in crane design and manufacturing, our products strictly comply with the EN 13001-3-7:2020 standard system, offering lifecycle service from solution design and manufacturing and installation to after-sales maintenance. For details on how this standard is applied in our products, contact our technical team for comprehensive technical documentation.
