Double-Girder Mobile Gantry Crane: A Powerful Tool for On-Site Lifting of Heavy Concrete Components
In bridge prefabrication yards and prefabricated building construction sites, concrete components such as box girders, T-beams, and piers weighing tens of tons are both heavy and brittle—prone to swaying during lifting, jamming during relocation, and dangerous during operation. This double-girder mobile gantry crane was designed to solve these pain points in on-site lifting of heavy concrete components.
Technical Parameters:
| Load Capacity | 50~200 tons (customizable to fit different concrete component weights) |
| Span | 18~30 meters (suitable for the transverse spacing of precast box girders and T-beams) |
| Travel Type | Tire-mounted portable (solid engineering tires) |
| Travel Speed | 0~5m/min (stepless speed regulation, suitable for slow site relocation) |
| Climbing Aibility | ≤3% (suitable for flat construction sites) |
| Lifting Height | 10~15 meters (to meet the height requirements for component stacking and loading) |
| Lifting Speed | 0.5~3m/min (slow start and slow drop to reduce impact on concrete components) |
| Control Mode | Industrial-grade wireless remote control (433MHz anti-interference band) |
Why has it become an essential requirement on construction sites?
Double-Girder Strength: Heavy Load Bearing and Stable Components. The main double-girder is welded from high-strength steel, with a rated load capacity covering heavy concrete components ranging from 50 to 200 tons. During lifting, the main girder exhibits minimal deflection and strong anti-sway performance, preventing cracks in brittle concrete components due to shaking or impact, thus steadily protecting the quality of prefabricated components.
**Mobile Adaptability:** The wheeled system moves flexibly along pre-set routes (including straight lines and small-radius turns) without relying on fixed tracks, adapting to various environments such as prefabrication yards and temporary sites. From component prefabrication platforms to beam storage areas and loading areas, it completes hoisting and relocation in one stop, eliminating the need for repeated disassembly and assembly.
**Wireless Remote Control:** Operators can remotely control the system from a safe area 50 meters away, performing lifting, luffing, and movement actions with a single button, avoiding high-risk areas beneath the components throughout the process. Remote control accuracy reaches ±5cm, precisely aligning component lifting points and beam storage supports, saving time and risk associated with manual alignment.
**Customized Adaptation:** Equipped with specialized hoisting clamps (adapted to box girder lifting points and T-beam embedded holes) to suit the characteristics of alloy concrete components, the system offers stepless speed adjustment (0-3m/min), slow lifting and lowering to reduce impact on components, perfectly matching the "vibration- and impact-sensitive" characteristics of concrete components.
**Wireless Remote Control:** Operates from a safe area 50 meters away, enabling one-button lifting, luffing, and moving, completing the hoisting and relocation process in one stop, eliminating the need for repeated disassembly and assembly. For prefabrication yards and prefabricated construction sites, it is more than just a crane—it is a "safe transfer link" for heavy concrete components and an "accelerator" for construction site efficiency, turning the hoisting of tens of tons of concrete components from a "laborious and dangerous task" into a "highly efficient and controllable standard operation".