Highway Bridge Girder Launcher Girder Crane
Highway bridge girder launcher girder crane, also known as a beam launcher or girder launcher, is a specialized crane used to lift, position, and install huge precast concrete or steel girders during bridge and road building. This heavy-duty equipment is essential for assembling bridge spans because it allows for exact positioning of girders over piers.
Bridge girder erection cranes are widely used in highway, railway, and overpass construction, and they are critical for projects
requiring great precision, efficiency, and safety while handling enormous structural components.
Key Features & Benefits
✅ High Lifting Capacity – Some models handle up to 160 tons.
✅ Efficient Girder Placement – Can erect 4 girders per day with auxiliary cranes.
✅ Adaptability – Works on curved tracks (R350 radius) and slopes.
✅ Durability – Built to ISO, CE, and Chinese safety standards.
specification
1. Lifting capacity: 160 tons (excluding spreader weight)
2. Self-weight of the bridge erecting machine: 118 tons (maximum weight of a single piece: 7t)
3. Wind resistance
No-load walking state: 8 level
No-load anchoring state: 12 grades
Lifting state with full load: Level 7
4. Lifting speed: full load: 0~1.0/min
No load: 0~1.5 m/min
5. Luffing speed: 0~0.6 m/min (with load luffing)
6. Working range: Rmin=7m Rmax=12m
7. The walking mode of the whole machine: walking type (the oil cylinder is pushed up, and there is no load during the walking process)
8. Traveling speed of the whole machine: The whole movement is 15m , including the anchoring disassembly, reversing the track, and positioning, the whole process takes no more than 2 hours.
9. No-load climbing ability of the whole machine: ±3.5°
10. Lifting height: 65m below the bridge deck, 1m above the bridge
11. Front and rear anchoring distance: 18m (16m, 19.5m)
12. The distance between the left and right support points during work: outside 10.5m, inside 5.7m
Distance between front and rear support points: 16.85m
13. Lifting deflection angle: horizontal bridge direction 1.5 degrees, longitudinal bridge direction 3.5 degrees
14. Spreader leveling performance: With vertical and horizontal leveling functions
15. The installed capacity of the whole machine: 110Kw
16. Stability factor of the whole machine: meets the requirements of GB3811-83 ( various working conditions∑M>0 )
17. Product features and advantages: Double-width and two-way beam erection, step-by-step walking, counterweight cross-span, front and rear outriggers are equipped with hydraulic systems, outriggers can be adjusted by 0.8-1 meters, the main beam can be adjusted, and 45-degree inclined beams can be erected, etc.
Pictures & Components
Main Components of a Bridge Girder Launcher
1. Main Girder Structure
Double-girder design (common for heavy loads) or single-girder (lighter applications).
Made of high-strength steel to support the weight of precast girders (up to 160 tons in some models).
2. Hoisting Mechanism
Wire rope hoist (for lifting and lowering girders).
Trolley system moves horizontally along the girder for precise positioning.
3. Support Legs & Travel System
Rail-mounted wheels for movement along the bridge construction path.
Adjustable legs to stabilize the crane on uneven terrain.
4. Control System
Electric-powered with pendant or remote control for operator safety.
Variable speed motors for smooth girder placement.
5. Safety Features
Overload protection to prevent crane failure.
Limit switches to avoid over-travel of the trolley.
Anti-tip mechanisms for stability on slopes.
Sketch
Advantages
Features of Highway Bridge Girder Erection Machine:
Bridge girder erection cranes are designed to handle extremely massive and heavy girders, weighing anywhere from 100 to over 1000 tons. They can also support broad spans between piers, making them ideal for large-scale bridge projects.
Segmental Lifting Mechanism
Equipped with dual lifting mechanisms that allow for precise lifting and placement of long bridge girders in segments, ensuring stability and reducing structural stress during the erection process.
Multiple Operation Modes
A range of operating modes are available, including front, rear, and side beam placement, allowing for flexible girder positioning to fulfill the special requirements of complicated bridge building layouts.
Self-Propelled Structure
The crane is frequently mounted on a self-propelled gantry system, which allows it to move along the bridge structure, reposition itself, and install several girders without requiring further transportation or setup.
Advanced Control Systems
Integrated with cutting-edge control systems, including remote and automatic control capabilities. These technologies let
operators to precisely adjust movements and positions, which improves girder placement accuracy.
Modular Design
EXCELLENT bridge girder erection cranes are designed with a modular structure that allows for simple assembly, disassembly, and transit between project sites, making them an economical choice for many projects.
Application
Highway bridge girder launchers are specialized gantry cranes designed for efficient and precise installation of precast concrete girders in bridge construction projects. Below are their key applications, derived from industry use cases and manufacturer specifications:
1. Highway & Railway Bridge Construction
Erecting precast concrete girders (typically 20m–50m spans) for viaducts and overpasses 68.
High-speed rail projects (e.g., 250–350 km/h lines), where speed and precision are critical.
2. Tunnel & Confined Space Projects
Navigating tight spaces (e.g., tunnel portals) with foldable "C"-shaped supports to minimize footprint.
Erecting girders inside tunnels using compact designs like the HZQDY900 model.
3. Urban Infrastructure Development
Building elevated urban expressways where traditional cranes lack mobility.
Handling curved bridge sections (min. radius R350) with adjustable trolleys.
4. Large-Span Bridge Erection
Launching box girders (up to 900-ton capacity) for long-span bridges.
Simultaneous carrying and erecting, reducing reliance on auxiliary cranes.
5. Rapid Construction Projects
Installing 4+ girders per day with coordinated use of secondary cranes 69.
Minimizing assembly time via modular designs (e.g., honeycomb-girder structures).
production procedure
1. Design & Engineering
Requirement Analysis: Understand project specifications, bridge span, load capacity, and site conditions.
Structural Design: Create detailed structural and mechanical designs, including load calculations, stress analysis, and safety factors.
Approval & Review: Submit design for client and engineering team review, followed by any necessary revisions.
2. Material Procurement
Steel & Components: Purchase high-grade steel plates, sections (H-beam, box girder profiles), and other raw materials.
Hydraulic & Electrical Systems: Procure hydraulic cylinders, motors, control systems, sensors, and other essential parts.
3. Steel Structure Fabrication
Cutting: CNC plasma/laser cutting of steel plates and beams according to design drawings.
Machining: Precision machining of key components like pin holes, bearing seats, and joints.
Welding: Assembly and welding of steel structures (main girder, front/rear legs, cross beams, etc.).
Non-Destructive Testing (NDT): Ultrasonic or magnetic particle testing to inspect welds.
4. Surface Treatment
Blasting: Sandblasting or shot blasting to remove rust and impurities.
Painting: Apply primer, intermediate coats, and topcoats according to corrosion protection standards (e.g., epoxy or polyurethane coatings).
5. Assembly of Mechanical Components
Hydraulic System Installation: Mount hydraulic cylinders, pumps, hoses, and control units.
Electrical System Wiring: Install control panels, limit switches, wiring, and other automation components.
Gearbox & Winch Installation: Assemble lifting winches, gearboxes, and drive systems.
6. Pre-Assembly & Testing
Trial Assembly: Pre-assemble key modules (e.g., main girder with support legs) at the workshop.
Functional Testing: Test hydraulic and electrical systems, verify lifting/lowering mechanisms, and perform load simulations.
7. Disassembly & Packing
Disassembly: Break down the launcher into transportable modules.
Packing: Apply anti-corrosion treatment and pack components for shipment (e.g., wooden crates, steel frames).
8. Transportation to Site
Logistics Planning: Organize transport of launcher modules to the bridge construction site.
9. On-site Assembly & Commissioning
Final Assembly: Assemble the launcher on-site under the supervision of engineers.
Commissioning & Load Testing: Perform real-time load tests, safety checks, and adjustments.
10. Handover & Training
Handover to Client: Officially hand over the fully assembled launcher.
Operator Training: Provide training to client's operators on safe operation and maintenance.
2. The production process begins with the design and engineering phase, where the technical specifications are established. This involves careful planning and analysis, taking into consideration factors such as the intended use, dimensions, weight capacity and location. Skilled engineers work together to create a detailed blueprint of the Bridge Girder Launcher, which serves as the foundation for the actual production.
3. The second phase of the production process involves the actual fabrication of the Bridge Girder Launcher. This requires the use of specialized equipment and expertise, as well as adherence to strict safety protocols to ensure a safe and efficient production process. Skilled technicians work with the materials to create the girder segments and launcher components, which are then assembled to create the final Bridge Girder Launcher.
4. Once the Bridge Girder Launcher is complete, it undergoes a rigorous quality control process to ensure that it meets all technical specifications and safety standards. This involves testing the Launcher's durability, weight capacity and accuracy in launching girders.
5. Throughout the entire production process, a positive and proactive attitude is crucial to ensure a successful project outcome. Each step requires careful attention to detail and perseverance, as well as a commitment to excellence and innovation.
6. In conclusion, the production of a Bridge Girder Launcher is a vital component of the bridge construction process. It requires the skills and expertise of a highly trained team, who work diligently and with a positive attitude to ensure a successful outcome. By maintaining a focus on quality, safety and innovation, we can continue to build the infrastructure that will shape our future.
Workshop View
The company has installed an intelligent equipment management platform, and has installed 310 sets (sets) of handling and welding robots. After the completion of the plan, there will be more than 500 sets (sets), and the equipment networking rate will reach 95%. 32 welding lines have been put into use, 50 are planned to be installed, and the automation rate of the entire product line has reached 85%.
Hot Tags: highway bridge girder launcher girder crane, China highway bridge girder launcher girder crane manufacturers, suppliers, factory
Previous
No InformationYou Might Also Like
Send Inquiry