Application of box girder gantry crane in precast concrete yard
As the output and specifications of precast concrete components continue to increase, the shortcomings of traditional lifting equipment in terms of efficiency, precision, and safety are gradually becoming apparent. Box-girder gantry cranes, with their strong load-bearing capacity, good rigidity, high wind resistance, and adaptability to large spans and heavy loads, have become one of the most common and reliable solutions in large precast yards.
Typical problems faced by prefabrication sites
- Individual components are heavy and bulky, requiring high-load, high-stability lifting equipment.
- Production lines and storage areas span large distances, requiring cross-area handling and precise positioning.
- Outdoor operations are subject to wind, rain, and temperature fluctuations, requiring equipment with excellent weather and wind resistance.
- The fast pace and frequent turnover of operations place high demands on equipment reliability and maintainability.
main girder installation of precast yard gantry crane
Why choose box girder gantry crane
- High rigidity and large span load-bearing capacity: The box-type main beam has a strong load-bearing capacity and a relatively reasonable deadweight, making it suitable for long spans and heavy loads. It can stably support spans of 25m, 50m or even larger, and lifting loads ranging from tens to hundreds of tons.
- Good wind and weather resistance: The wind pressure area of the box girder structure is controllable, and combined with the reasonable leg and track anchoring design, it can meet the stringent requirements of outdoor high wind loads and A3-A8 working systems.
- Diversified lifting devices and synchronous control: Dual trolleys, dual hoists or multi-point synchronous grabbing devices (spreaders) can be configured to achieve stable lifting and precise positioning of large components such as long beams and box beams, reducing secondary processing and transportation time.
- Improve production rhythm and safety: Technologies such as automated or semi-automatic control, variable frequency speed regulation, and anti-sway control can significantly improve cycle efficiency and reduce dependence on operators, thereby improving production capacity and safety.
Technical configuration recommendations (based on common prefabrication site requirements)
- Lifting capacity: Select according to the maximum weight of a single component (common 10-200t, customizable). Double-girder structures are generally used for heavy loads ≥20t and long spans.
- Span and lifting height: The span is determined by the working width and the number of stacking rows; the lifting height must cover the formwork height + stacking layer height + safety margin
- Lifting type: Long beams usually use two-point or four-point synchronous lifting equipment; Panel/box beam components can choose adjustable suction lifting or fork-type grippers to reduce component stiffness stress.
- Control and safety: It is recommended to configure variable frequency speed regulation, PLC synchronization control, deformation/swing compensation, wind speed interlock, track anti-deviation device and remote monitoring module to improve stability and maintainability.
Other types of precast use gantry cranes
L leg gantry crane fo prcast beam yards
The box girder gantry crane is an efficient solution for large, heavy-loaded, and high-frequency precast concrete sites: with its excellent structural rigidity, wind resistance, and multi-point precision lifting capabilities, it solves the core problems of "heavy, long, accurate, and fast" in the handling of precast components. For precast companies that are planning to expand production, improve turnover efficiency, or undertake the production of large-span bridge box girders, investing in a customized box girder gantry crane can significantly increase production capacity and reduce unit costs in the long run. If you need a specific selection and quotation based on the component specifications and processes of your site, I can help you organize the general technical parameters into a selection list, or give preliminary suggestions based on on-site photos.