Gantry crane
MG Type Double Girder Gantry Crane
Product Overview
The MG Type Double Girder Gantry Crane (A-Frame Goliath Crane) is built for heavy-duty, high-frequency industrial material handling. Equipped with a dedicated winch trolley or open winch system, this crane delivers high lifting capacity, wide spans, and high duty classifications (ISO A5–A7). It is widely deployed in shipyards, steel mills, precast bridge yards, and heavy manufacturing facilities.
Key Features & Advantages
- Superior Load Rigidity: Double box-beam main girders fabricated with high-strength Q235B/Q355B structural steel, providing outstanding torsional stiffness and maximum stability under heavy loads.
- High-Performance Winch Trolley: Heavy-duty open winch hoisting mechanism with dual brakes, alloy steel gears, and full variable-frequency speed control for millimeter-level precision.
- Extended Outreach with Cantilevers: Single or double side cantilevers expand the working area beyond the rail track boundaries, simplifying logistics between bays.
- All-Weather Structural Reliability: Heavy-duty anti-corrosion coating and enclosed electrical cabinets designed for reliable 24/7 continuous outdoor operations.
- Interchangeable Lifting Attachments: Readily configured with standard hooks, motor grabs, electromagnetic chucks, or container spreaders.
Technical Specifications
| Technical Parameter | Specification Range |
|---|---|
| Model | MG Type Double Girder Hook Gantry Crane |
| Lifting Capacity | 5 Tons – 500 Tons (Main Hook + Aux Hook configuration) |
| Span (S) | 10 m – 50 m |
| Lifting Height (H) | 6 m – 30 m (Customized to site needs) |
| Working Duty / Class | ISO A5 – A7 / FEM 2m – 4m |
| Hoisting Speed | 1 – 15 m/min (Inverter Stepless Regulation) |
| Trolley Travel Speed | 10 – 40 m/min |
| Crane Travel Speed | 20 – 60 m/min |
| Power Supply System | Spring / Motorized Cable Reel, Slip Line, or Festoon System |
| Control Method | Ergonomic Closed Cabin / Industrial Remote Control |
Safety Protection System
- Smart Load Monitoring: Real-time multi-channel load display and auto power cut-off upon overload.
- High-Wind Safety System: Digital anemometer with automatic audible warning and track-braking interlock.
- Hydraulic Rail Clamps: Automatic hydraulic rail clamps and mechanical storm anchors against severe weather.
- Limit Systems: Rotary gear lifting limit switches and photoelectric travel deceleration sensors.
- Emergency Systems: Complete emergency power cut-off circuit and loss-of-voltage protection.
Applications & Working Environments
- Heavy industrial machinery manufacturing and assembly workshops
- Steel production plants, coil handling stockyards, and scrap yards
- Precast bridge girder casting yards and high-speed rail construction projects
- Port freight transfer hubs, railway container depots, and shipyard dry docks
Get a Custom Quote
Need a heavy-duty gantry crane engineered for demanding industrial tasks? Reach out to Chengdu Weiyuan for technical specifications, load diagrams, and competitive factory-direct pricing.
FAQ
1. What’s the information should I provide when inquiry?
More details or drawings, better. A: Lift capacity B: Crane arm length C: lift height: hook travel distance D: What material to lift E: power source or other specials you give us will be more appreciated.
2. How many operating methods for my selection?
Standard operating methods: A: pendent controller with push buttons .B: remote control with push buttons. Choose any type as you like.
3. Can this type work in hazardous environment?
Sure! We can customize for you, acid proof or explosion proof, no problem for that.
4. What about warranty time ?
12 months.
5. How can we install the crane? Our senior engineer can be your side to do the installation guide service and training.
6. May I visit your factory?
Of course. We can pick you up at train station, high-speed rail station or airport, and book hotel for you.