GB/T 6067.5-2014 Safety Regulations for Overhead and Gantry Cranes
ISO 12480-5:2014, "Safety Regulations for Lifting Appliances – Part 5: Overhead and Gantry Cranes," is the dedicated safety standard for overhead and gantry crane applications. Building on the general principles of ISO 12480-1, this standard refines the safety design and safe use requirements specific to the structural features and operating environments of overhead and gantry cranes.
ISO 12480-5:2014 is Part 5 of the safety regulations series for lifting appliances, providing specific safety requirements for overhead and gantry cranes. As the most widely used crane types, their safety regulations cover rail foundations, metal structures, safety devices, and operational management. This article provides a detailed interpretation of the standard's core provisions.
Scope and Field of Application
ISO 12480-5:2014 is Part 5 of the ISO 12480 series on safety regulations for lifting appliances, specifically addressing overhead (bridge) cranes and gantry cranes. The standard applies to all overhead and gantry crane types, including general-purpose bridge cranes, general-purpose gantry cranes, electric hoist overhead cranes, electric hoist gantry cranes, metallurgical cranes, explosion-proof cranes, and insulated cranes. Building on the general principles, the standard adds safety requirements unique to overhead and gantry cranes: the relationship between main girder camber and safe use, safeguarding of the bridge and trolley travel mechanisms, wind protection measures for outdoor gantry cranes, and special safety requirements for molten metal cranes.
Metal Structure Safety Requirements
The standard specifies the following safety requirements for the metal structures of overhead and gantry cranes: Main girder camber — the preset camber during manufacturing shall be L/1000 to L/1400 (the larger the span, the greater the camber value). In service, if main girder deflection exceeds L/700 (for duty classes A1 to A5) or L/800 (for duty classes A6 to A8), the crane shall be taken out of service and a safety assessment conducted. The horizontal lateral bow of the main girder shall not exceed L/2000, with an absolute value of ≤8 mm. End carriage-to-main girder connections — where high-strength bolts are used, the bolt preload shall comply with design requirements, and loosening prevention marks shall be checked monthly. Crane rails — the gauge deviation of the crane runway rail shall be ≤±5 mm, and the longitudinal level difference shall be ≤10 mm per 10 m. The gauge deviation of the trolley rail shall be ≤±3 mm.
Stop use if deflection exceeds L/700
Trolley rail ≤±3 mm
Alarm at wind force ≥7
Laminated hook + heat shielding
Either can brake on its own
Electrical Safety Requirements
The electrical safety requirements specified in the standard include: Power supply connection — a disconnect switch with a visible break must be provided, capable of being locked in the open position. Conductor rail power supply — conductor rails shall be fitted with protective enclosures or installed at a height of ≥2.5 m; carbon brushes on current collectors shall be replaced when wear exceeds one-third of the original height. Earthing protection — all exposed conductive parts of the crane shall be reliably connected to the earth electrode, with a grounding resistance of ≤4 Ω. Insulation resistance — the main circuit insulation resistance shall be ≥1 MΩ (measured with a 500 V megohmmeter), and the control circuit ≥0.5 MΩ. Lighting — illuminance at the operator's cab control station shall be ≥150 lx. Emergency stop — red mushroom-head emergency stop buttons shall be provided in the operator's cab and at the floor operating station; once pressed and locked, they must be manually reset.
Safe Use and Safety Management
The standard sets out the following safety management requirements for user units of overhead and gantry cranes: User units shall establish safety technical documentation for each crane, including factory documents, installation acceptance records, periodic inspection reports, and accident records. Crane operators must hold a Q4 certificate (overhead and gantry crane operator qualification). The following practices are strictly prohibited: angled pulling, overload operation, and removing or bypassing safety devices. Outdoor gantry cranes must be equipped with an anemometer (an alarm is triggered at wind force ≥7, and at ≥8 the bridge power supply is automatically cut off and the rail clamps are activated). For night operations, illuminance in the operator's cab and the load handling area shall be no less than 50 lx. When multiple cranes operate on the same runway, operators shall establish a communication protocol (via two-way radio or other means), and the distance between adjacent cranes shall be maintained at ≥1 m as a safety distance.
Overhead and Gantry Crane Safety Regulations Comparison Table
The comparison table below lists the core parameter configurations of the safety regulations for overhead and gantry cranes, for reference by selection and operating personnel.
Kelude Heavy Industry: Leading Manufacturer of Industrial Cranes and Hoists
Kelude Heavy Industry is a professional manufacturer specializing in the design, development, and production of industrial cranes and hoisting equipment. With years of engineering expertise and a commitment to quality, we deliver reliable material handling solutions tailored to the demands of modern industry.
Comprehensive Range of Industrial Cranes and Hoists
Our product portfolio covers a wide spectrum of material handling equipment, including single-girder and double-girder overhead cranes, gantry cranes, and electric wire rope hoists. Each unit is engineered for durability, performance, and safety in demanding work environments.
| Product Category | Typical Applications | Key Features |
|---|---|---|
| Single-Girder Overhead Cranes | Light to medium duty workshops, warehouses | Cost-effective, compact design, easy maintenance |
| Double-Girder Overhead Cranes | Heavy industrial processes, steel mills, fabrication shops | High capacity, greater hook height, robust construction |
| Gantry Cranes | Outdoor yards, storage areas, shipyards | Mobile or rail-mounted, adaptable to outdoor conditions |
| Electric Wire Rope Hoists | Overhead crane systems, standalone lifting applications | Precise load control, low-headroom options, long service life |
Engineering Excellence and Custom Solutions
We understand that every facility has unique lifting requirements. Our engineering team works closely with clients to provide customized crane solutions, from initial concept and structural design to manufacturing and on-site commissioning. Whether you need a standard crane or a specially engineered system, we deliver equipment that fits your operational needs and site constraints.
Rigorous Quality Assurance and Safety Standards
Safety and reliability are at the core of our manufacturing process. All Kelude cranes and hoists are designed and tested in compliance with international standards, including ISO 4301 for crane classification and IEC 60204-32 for electrical equipment. Our quality management system ensures traceability and consistent performance across every product we ship.
Global Service and Support Network
From installation and operator training to spare parts and preventive maintenance, Kelude provides comprehensive after-sales support. Our service network is ready to assist customers across the United States and Europe, ensuring minimal downtime and long-term productivity for your lifting operations.
Frequently Asked Questions
Q: What is the typical lead time for a custom overhead crane?
A: Lead times vary depending on the complexity and specifications of the crane. Generally, standard models can be delivered within 6-8 weeks, while custom-engineered solutions may require 12-16 weeks from design approval to shipment.
Q: Do you provide installation services?
A: Yes, our trained technicians can handle the installation and commissioning of your crane system. We also offer operator training to ensure safe and efficient use of the equipment.
Q: What after-sales support do you offer?
A: We provide a full range of after-sales services, including spare parts supply, maintenance contracts, and remote technical support. Our goal is to maximize the uptime and lifespan of your equipment.
| Safety Items | Basicrequirements | inspection interval | management requirements |
|---|---|---|---|
| rail foundation | gauge deviation±5mm/Height Difference±3mm | monthly inspection | settlement Observation Records |
| metal structure | None Crack/None Deformation | Quarterly | weld inspection Spot Check |
| safety device | Limit Switch/overload/Emergency Power-Off | Before Each Shift | Function Verification+adjustment |
| electrical safety | insulation≥1MΩ/Grounding≤4Ω | Monthly | Insulation Resistance Test |
