Box Beam Double Girder Gantry Crane, Heavy Duty Gantry Crane - MG Series

Box beam double girder gantry crane, with double beam hoist crab /open winch trolley for heavy duty load handling, 5 ton - 550 ton. Gantry crane for sale. The box type double-girder gantry crane is a heavy duty gantry crane with two girders that is commonly used for general purposes. Double girder gantry cranes are heavy-duty cranes that are used both indoors and outdoors in situations where overhead crane runways are impractical. The capacity of the double girder gantry crane ranges from 5 to 500 tons. The gantry crane's working classes are A5 and A6.

Because the lifting capacity of a box girder gantry crane can reach hundreds of tons, it is also classified as a heavy duty gantry crane. In comparison to the single girder gantry crane, the gantry crane has a higher carrying capacity, a larger span, and better stability; therefore, it will be much more expensive.The double girder gantry crane are usually adopted for large and heavy loads handling in outdoor workplaces such as ports, shipyards, warehouses, and construction sites.

Are you looking for reputable manufacturers of double girder gantry cranes? Yuantai Crane may be the best option for you!

Not every project needs a double girder setup. But in many industrial cases, it quickly becomes the better option once you look at the actual working conditions.

• You need to lift heavy loads, usually from 10 ton up to 500 ton
• Your working area requires a long span, often 30–60 meters or more
• The crane will run many hours per day, not just occasionally
• The installation is outdoors, exposed to wind, dust, or temperature changes

Practical tip: If your lifting is occasional and below 10–15 ton, a single girder crane can save cost. But if your operation runs daily and downtime is expensive, a double girder gantry crane gives you more margin and fewer long-term issues.

Another thing buyers often notice later—double girder cranes leave more room for maintenance platforms, walkways, and accessories. That makes inspection and repair easier over time.

You will usually find double girder gantry cranes in places where lifting is part of daily production, not just occasional handling. These are not light-duty environments.

• Steel mill crane: handling billets, slabs, and coils, often with high temperature and heavy weight
• Precast yards: moving beams, pipes, and large concrete components across wide areas
• Shipyards: lifting large steel sections and assembled structures
• Outdoor storage yards: handling steel materials, equipment, or containers

In these environments, stability matters more than anything else. Loads are not always centered, and lifting paths are long. That is where a double beam gantry crane shows its value.

When buyers compare options, the box girder design often stands out. It is not just about structure—it affects how the crane behaves under load.

• Higher rigidity: the closed box structure reduces deflection, so the crane stays stable even with heavy or uneven loads
• Better durability: suitable for continuous heavy duty gantry crane operation with less structural fatigue over time
• Safer operation: reduced vibration and deformation, especially on long spans

Buyer insight: For capacities like 50 ton, 100 ton, or higher, most buyers choose a box girder gantry crane. It may be slightly heavier than a truss design, but the added stability is worth it in daily operation.

Also, if your work involves precise positioning—like placing precast beams or aligning steel components—the box girder structure helps keep movement controlled. It's one of those things you only fully appreciate after using it.

In steel mills, handling billets, slabs, and coils efficiently is critical. Double girder box girder cranes provide the capacity and precision required for these heavy loads.

• Lift extremely heavy steel products safely
• Move materials quickly across large spans
• Reduce the risk of product damage due to stable operation
• Support continuous operation in high-frequency environments

Precast yards often need to lift beams, pipes, and large concrete components. These cranes offer precise positioning and flexibility for varied shapes and sizes.

• Handle irregularly shaped concrete elements with precision
• Operate efficiently in large outdoor yards
• Minimize labor-intensive manual handling
• Reduce downtime with easy maintenance access

Shipyards and fabrication plants deal with large steel sections and heavy structures. The double girder box girder crane ensures safe lifting and positioning of these massive components.

• Lift and transport heavy ship sections safely
• Enable precise alignment during assembly
• Support long-span operations in large shipyards
• Withstand continuous use in industrial environments

For container yards, steel storage, or machinery yards, these cranes provide reliable material movement even under challenging weather conditions.

• Handle containers, heavy machinery, and steel safely
• Operate reliably in wind, rain, or temperature fluctuations
• Cover wide outdoor spans for efficient material flow
• Allow customization for remote or cabin operation depending on site requirements

Overall, the industrial benefits of double girder box girder gantry cranes include higher lifting capacity, enhanced operational safety, long-term durability, and adaptability to various sectors. Investing in such a crane improves efficiency, reduces downtime, and supports safe, reliable material handling across industrial applications.

The bridge, trolley, crane traveling mechanism, and electric system are the main components of a typical box type double girder gantry crane.

The box girder gantry crane can be customized according to your lifting requirement and application conditions. For different loads handling, the box type double girder gantry cranes can be equipped with grab bucket, container spreader, and other special lifting devices to meet your lifting requirement and ensure your material handling efficiency.

• Double welded box beams with camber lines that meet and exceed national standards.
• End beams or ground beam are equipped with a buffer block and an orbital cleaning device.

• The gantry trolley parts primarily consist of a motor, a speed reducer, a brake, a coupling, wheels, and coiling blocks.
• A modular design with various types of combinations is flexible to meet the needs of various customers.

• Module control speed, micro-speed, and double speed are available.
• Reasonably designed control box layout is easy to repair.
• High protection class IP55.

• Shields and barriers are set to prevent the hook clashing the top.
• Rail clamps, anti-collision, sound and light alarm devices.
• Rainproof devices are equipped with lifting mechanism and electrical control box when the crane is placed outdoors.
• Lifting weight limitation, height limitation, rail clamping devices.
• Speeding protection, circuit self-test protection, zero pressure protection, and lightning protection.

• Driver room/driver cabin with broad vision, safe and easy to operate.
• Remote control, no need for a professional driver. Life of 500,000 cycles.
• Protection class IP65.

Before picking a crane, consider the basic operational requirements. Knowing these key parameters helps ensure your crane meets both current and future needs.

• Maximum lifting weight: Identify your heaviest load, not just the average. This ensures the crane can safely lift all your materials.
• Span: Determine the distance the crane must cover. Longer spans may require stronger girders or additional supports to maintain stability.
• Lifting height: Check required clearance for vehicles, equipment, or storage stacks. Proper height prevents operational issues and collisions.
• Working frequency: How many hours per day will the crane operate? Continuous or high-frequency use may require heavy-duty motors and reinforced components.
• Load type: Steel, concrete, machinery, or containers? Each type may need different grips, trolleys, or hoists for safe and efficient handling.

Practical tip: When your loads vary, always design based on the heaviest and most difficult lift. This ensures safety and long-term durability.

Even a well-designed crane can run into problems if site conditions and maintenance access are ignored. Here are common issues to check.

• Rail and runway installation: Misaligned rails cause uneven wear, vibration, and potential safety hazards.
• Future expansion: Consider whether load weights or span requirements may increase. Planning ahead prevents the need for a replacement crane.
• Maintenance access: Safe platforms for inspection and repair reduce downtime and improve worker safety.
• Power supply: Confirm your site matches the crane's voltage, phase, and frequency requirements to avoid performance issues.
• Wind protection: For outdoor cranes, wind loads affect stability. Proper barriers, structural reinforcements, or design adjustments are necessary.

Customization ensures your crane works specifically for your operation. These options improve efficiency, safety, and flexibility on site.

• Trolley configuration: Single or double trolley setups allow simultaneous lifts or balanced handling of large items.
• Control method: Choose between pendant, remote, or cabin operation based on your site layout and operator comfort.
• Anti-sway system: Helps stabilize loads, making precise placement easier and reducing the risk of accidents.
• Hoist options: Wire rope, electric chain, or specialized clamps/grabs depending on material type and handling needs.
• Duty class: Light, medium, or heavy-duty configurations are tailored to your operating hours and load cycles.
• Environmental design: Explosion-proof, weatherproof, or corrosion-resistant coatings protect the crane in harsh conditions.

Real-world insight: Most crane problems come from site setup, environment, or improper specifications—not the crane itself. Customization helps prevent these issues and ensures the crane fits your exact operational requirements.

The box girder design uses a solid, closed beam for the main girder. This gives the crane excellent rigidity and reduces bending or vibration when lifting heavy or uneven loads. It is especially useful in steel mills, precast yards, and fabrication shops where precision is important and the crane is running multiple hours each day.

• Handles high capacity loads safely
• Stable under long spans and frequent operation
• Better suited for precise positioning tasks
• Requires slightly more material, so it's heavier than truss designs

Truss gantries have an open, lattice-like structure for the main girder. This makes them lighter, which can be advantageous for very large spans or when wind load is a concern. They are commonly used in container yards, outdoor yards, and areas with strong wind exposure.

• Lighter structure reduces material cost
• Better wind resistance for long spans
• Less rigid than box girder cranes, so vibration can be higher with heavy uneven loads
• Suitable for outdoor and open-air environments

• If your priority is strength, stability, and durability for heavy or frequent loads → choose a box girder gantry crane
• If your priority is long span coverage and better wind resistance with lighter structure → consider a truss gantry crane

In practice, most heavy industrial operations with demanding lifting and precise positioning lean toward box girder cranes. Truss cranes are often the choice when span length and environmental factors, like wind, take priority over maximum load rigidity.

Choose a capacity based on your heaviest single load plus a safety margin of 20–30%.

• This ensures the crane can handle peak loads safely without overloading.
• Consider load type, frequency, and whether the crane will operate continuously.

Box girder cranes are better for heavy, precise, and frequent lifting; truss cranes are lighter and better for very long spans or high-wind areas.

• Box girder is ideal in steel mills, precast yards, and heavy fabrication.
• Truss gantries are preferred for outdoor yards where wind resistance is important.

Measure the total distance the crane must travel and the maximum lift height needed at any point in your facility.

• Include clearance for vehicles, racks, or obstacles under the crane.
• Future expansion should be factored in to avoid buying a new crane later.

Yes, double girder box girder cranes can be customized with weatherproof coatings, wind protection, and corrosion resistance for outdoor use.

• Wind loads, rain, and temperature changes should be considered during design.
• Optional features like cabin operation or remote control improve safety in exposed environments.

They can handle steel products, precast concrete, machinery, containers, and other heavy industrial items.

• Load handling may require specific hoist types, grabs, or clamps.
• Different industries may need specific attachments for safety and efficiency.

Maintenance depends on duty class and operating hours, but regular inspection of rails, motors, hoists, and structure is essential.

• Check alignment, lubrication, and wear on moving parts.
• Easy access platforms are recommended to reduce downtime and improve safety.

Absolutely, from trolley configuration and control method to hoist type and environmental protection, customization ensures the crane fits your operation.

• Single or double trolley for simultaneous lifting of large loads.
• Cabin or remote control options depending on site layout.
• Anti-sway systems, explosion-proof, or corrosion-resistant coatings available if needed.

Overlooking site setup, power supply, future expansion, or maintenance access is the main source of problems, not the crane itself.

• Ensure rail alignment and runway design are precise.
• Plan for future load increases and easy maintenance access.
• Confirm that your site's power supply matches the crane's requirements.