The bridge girder launcher is a heavy lifting equipment specifically designed for bridge construction. It has a strong load-bearing capacity and high operational precision, enabling it to safely and efficiently complete the lifting tasks of prefabricated bridge segments. Its overall structure is complex and powerful, consisting of the main beam, legs, hoisting trolley, electrical control system, and other auxiliary devices.
The main beam is the core load-bearing structure, usually made of high-strength steel, offering excellent rigidity and stability. The main beam is designed to resist bending and torsion, ensuring that it does not deform or get damaged when lifting heavy loads.
The legs are divided into front and rear legs, located at both ends of the main beam. They support the entire equipment and ensure its stability during operation. The legs are typically equipped with hydraulic systems to adjust height and movement, adapting to different terrain conditions and construction requirements. The front legs are usually fixed on the paved bridge deck, while the rear legs can move along tracks, allowing for easy equipment positioning and adjustment.
The hoisting trolley is located on the main beam and is responsible for lifting and moving prefabricated bridge segments or other heavy components. The hoisting trolley is equipped with electric or hydraulic drive systems, enabling precise lifting and lateral movement. Through variable frequency speed control technology, the hoisting trolley ensures smooth operation when starting and stopping, reducing impact on components and ensuring precise positioning of bridge elements.
In addition, auxiliary devices such as balance beams and track systems are also included to maintain balance and stability during the lifting process. The balance beam is used to adjust the load distribution between different lifting points. The track system ensures smooth movement of the legs and trolley on the tracks, improving overall operational efficiency.
The bridge girder launcher is capable of meeting various complex construction environments and task requirements. Whether crossing rivers, valleys, or urban roads, bridge builders can efficiently and safely complete bridge construction tasks.
Used for lifting prefabricated beam segments in highway bridges such as expressways, national highways, and provincial roads, ensuring efficient and safe bridge construction.
Suitable for the construction and maintenance of railway bridges, capable of quickly and accurately lifting large prefabricated beam segments to support the expansion and upgrading of railway networks.
Provides efficient and precise prefabricated component lifting solutions for the construction of bridges in urban rail transit systems such as subways and light rail.
Applicable to the construction of large-span bridges across rivers, lakes, and straits, with strong load capacity and high operational precision.
Designed for lifting and installing heavy prefabricated beam segments, it offers exceptional load-bearing capacity and stability to ensure safe operation under complex working conditions.
Equipped with advanced variable frequency drive systems and precise positioning devices, enabling smooth start/stop and accurate positioning to improve construction quality.
The legs and main beam can be adjusted according to different terrains and bridge spans, making the equipment highly flexible and suitable for a variety of complex construction environments.
Integrated with multiple safety features such as overload protection, limit switches, and emergency stop buttons to ensure high operational safety and minimize the risk of accidents.
| Span | 50m | 40m | 30m | ||||
| Rated capacity | 200t | 180t | 160t | 140t | 120t | 100t | 60t |
| Bridge span | 30-50m | 20-40m | 20-30m | ||||
| Max. slope | Longitudinal slope <5% cross slope <5% | ||||||
| Lifting speed | 0.41m/min | 0.45m/min | 0.5m/min | 0.56m/min | 0.65m/min | 0.75m/min | 0.9m/min |
| Trolley longitudinal speed | 3m/min | ||||||
| Trolley cross speed | 3m/min | ||||||
| Crane slide longitudinal speed | 3m/min | ||||||
| Crane side cross travel speed | 3m/min | ||||||
| Adaptive inclined bridge angle | 0~45° | ||||||
| Adaptive curved bridge radius | 400m | 300m | 200m | ||||
1. Industry Position
Founded in 2006, Dafang Heavy Machinery covers an area of 1,580 acres and employs over 2,600 people. With an annual sales revenue of 3.566 billion RMB, the company focuses on two main business sectors: lifting machinery and steel structures. Major products include single and double girder bridge and gantry cranes, electric hoists, steel structure bridges, prefabricated buildings, and industrial plants. Dafang serves critical sectors such as military industry, aerospace, nuclear power, offshore engineering, metallurgy, and mining. Its products are exported to over 100 countries and regions, including the United States, Russia, and Southeast Asia.
Annually, Dafang manufactures 30,000 single-girder cranes, more than 12,000 double-girder and gantry cranes, and 30,000 electric hoists. Based on production scale, sales volume, and brand recognition, the company ranks among the top three in China’s crane industry.
2. Core Technologies
Dafang’s R&D team consists of over 260 members, including 104 with senior or intermediate engineering qualifications. The company invests 3.8% of its annual sales into technology development. It has obtained 12 international invention patents, 50 national invention patents, 415 utility model patents, and achieved 43 scientific and technological milestones. Dafang was the first in the industry to adopt anti-sway and automatic positioning technologies.
In 2016, Dafang became the first enterprise in Henan Province to implement smart crane applications and to introduce remote monitoring technology. The company also developed the multifunctional brewing crane, filling a domestic market gap. In 2021, Dafang was the first in the industry to be certified for unmanned intelligent cranes. In 2022, it undertook a project for a tower crane at a commercial satellite launch site.
3. Manufacturing Capability
Dafang Heavy Machinery is equipped with advanced in-house designed manufacturing equipment, including 1,500-ton press grooving machines, extrusion machines, and roller machines. The company has established leading domestic workshops, including an electrical assembly line, steel pre-processing line, paint finishing line, and China’s first practical single-girder lean production line. Precision machinery includes imported German NILES CNC gear grinding machines and Japanese MAZAK machining centers.
Dafang strictly follows refined manufacturing processes, adhering to the principle of “doing it right the first time, zero defects.” This commitment to quality is deeply ingrained in every employee, ensuring that every product delivered meets the highest standards.
4. Service Assurance
Dafang upholds a “comprehensive, high-quality” service standard, providing users with fast, attentive, and thorough one-stop services. With 24/7 online support, choosing Dafang means complete peace of mind. Just tell us what you need—we’ll take care of the rest.
We offer bridge cranes with lifting capacities ranging from 100 tons to 900 tons, and provide non-standard customization for large-span girder lifting.
Yes. With adjustable legs and girders, our cranes are highly adaptable to rivers, valleys, highways, railways, and other challenging terrains.
The crane is equipped with PLC and remote control features, allowing automated operation, precise positioning, and easy start/stop, reducing manual labor intensity.
Yes. The crane is built with overload protection, limit switches, emergency stop buttons, and guiding systems to ensure safe and efficient operation.
