Double Girder Gantry Truss Crane

Double‑girder truss (lattice‑truss) gantry crane is outdoor heavy‑duty rail‑mounted lifting equipment adopting double main‑girder lattice‑truss structure.
Yangyumech truss‑type double‑girder gantry crane covers capacity from 1‑20 ton, span 8‑30 m. Double‑girder layout improves load‑bearing capacity by 40‑60% comparing with single‑girder truss model; open lattice‑truss brings low wind‑resistance coefficient.
Modular bolt‑connected components for convenient transportation and site assembly. Widely used for precast‑concrete yards, shipyard block handling, heavy steel‑material outdoor stockyards.

Description

Typical Application & Site Pre‑Conditions

Double‑girder truss gantry crane fits heavy‑duty open‑air outdoor scenarios:
‑ Precast‑concrete component production yards
‑ Shipyard hull‑block assembly & handling
‑ Heavy steel‑profile outdoor storage stockyards
‑ Large‑scale construction material lifting sites

Critical site‑pre‑condition:
1. Requires reinforced concrete rail‑foundation. Although truss‑structure reduces total dead‑weight, foundation shall be engineered to resist overturning‑moment under heavy‑load & gust‑wind.
2. For open‑air deployment, anemometer wind‑interlock, rail‑clamp and storm anchoring device are mandatory safety configurations.

Ambient temperature:‑20℃ ~ +40℃; Designed for outdoor rail‑mounted operation.

Custom Purchasing Process

1. Submit inquiry: Provide rated lifting capacity, span, lifting height, cantilever over‑hang requirement, working‑duty(A4‑A6), outdoor wind‑condition, trolley quantity(single / dual‑trolley), control‑mode, special‑environment requirement(coastal anti‑corrosion / explosion‑proof).
2. Custom technical drawing & quotation: Our engineering team delivers tailored layout drawing and formal quotation within 24 working hours.
3. Order confirmation: Confirm technical drawings, specifications, delivery cycle and commercial terms.
4. Production & strict‑quality‑inspection: Raw‑material inspection, welding UT non‑destructive‑test, dynamic‑static‑load factory‑acceptance‑test.
5. Seaworthy export‑packaging & ocean shipment; deliver full‑set of CE‑ISO export‑oriented certification documents.
6. After‑sales support: Installation‑guidance manual, remote‑technical‑service and long‑term spare‑parts supply.

Features

1. Double‑girder lattice‑truss main‑beam structure. Load‑bearing capacity increased by 40‑60% compared with single‑girder truss gantry crane, good performance for long‑span heavy‑load hoisting.
2. Full maintenance walk‑way with safety guardrail arranged between two main girders. Operators can access trolley and hoist components directly; no extra scaffolding required, cut maintenance labor‑hour by 60%.
3. Open lattice‑truss structure brings low wind‑resistance coefficient, well‑adapted for open‑air windy site operation.
4. Modular bolt‑connected components for segmented transportation and on‑site assembly. Reduce large hoisting‑equipment requirement during installation.
5. Multiple safety‑protection suite: main‑beam deflection monitoring system, rail‑clamp + storm anchoring anti‑wind device, travel & height limit switches, double‑beam synchronization monitoring. Comply with GB/T3811‑2008, available for CE‑ISO certification.
6. Rich customizable options: dual synchronized trolleys for four‑point balanced lifting, anti‑sway hoisting system, operator cabin, even automated unmanned control for intelligent yard.
7. Wide working‑duty coverage A4‑A6, suitable for medium‑frequency up to heavy‑duty multi‑shift outdoor production.

Technical Data

Capacity1t2t3.5t5t10t16t20t
Span8-16m10-18m12-20m12-22m14-25m16-28m18-30m
Lifting height6-12m6-14m8-16m8-18m10-20m12-24m
Work DutyA4A5A5-A6A6
Lifting speed8/0.8m/min6/0.6m/min5/0.5m/min4/0.4m/min
Hoist Traveling Speed聽20-30m25-35m30-40m
Crane Traveling Sprrd25-40m30-50m30-60m
Railp30p30-p38p38-QU70QU70-QU80QU80-QU100QU100QU100-QU120

Purchasing Process

Our Crane Certifications

Our cranes (overhead crane, gantry crane, jib crane and electric hoist) are fully certified to meet international and local manufacturing standards. We hold complete qualification documents to guarantee product safety and reliable quality for global buyers. Below are our key certifications:

Our Custom Visit

We welcome worldwide customers to visit our manufacturing workshop. You can check crane production processes, raw materials and finished products face‑to‑face with our engineering team.

FAQs About Choosing the Right Gantry Crane and Supplier

In order to obtain accurate quotes for custom overhead cranes, providing the following core information will greatly improve efficiency:

1. Key specifications: including rated lifting weight (tons), span (i.e., track spacing, meters), and lifting height (meters), which is the basis of the design.
2. Use environment and working conditions: Explain the conditions of the installation site (such as indoor/outdoor, temperature, humidity) and work level (busy level), which determines the material selection and configuration level of the structure.
3. Specific configuration requirements: clarify the drive mode (such as frequency conversion control), brand preferences for electrical components, safety devices (such as overload limiters, anti-collision systems), and whether special functions such as remote control are required.
4. Installation and service: confirm the on-site power supply conditions (voltage, frequency), installation conditions, and specific expectations for delivery time, installation and commissioning, and after-sales service.

The more detailed the information provided, the more accurate and reliable the solutions and quotations obtained.

1. Span and lifting capacity: this is the foundation.The larger the span and the higher the rated lifting weight, the material and design costs of the main beam and structure will increase significantly, and the higher the price.

2. Working level and frequency of use: The working level (A1-A8) represents the busy level and load status of the crane.Cranes with frequent and heavy-duty use require more durable motors, gearboxes and structural parts, and the cost is naturally higher than that of lightweight and occasionally used equipment.

3. Structure and configuration: The double beam is more complex and stable than the single beam structure, and the price is higher.At the same time, the lifting height, operating speed, motor brand, control system (ordinary vs frequency conversion), and the level of safety devices (such as anti-swing, load monitoring) all directly affect the final quotation.

4. Degree of customization and brand service: completely standard models have lower costs.The customized design based on the workshop environment (such as explosion-proof and high temperature), special processes (such as metallurgical special), brand added value, and after-sales guarantee system will all be reflected in the price.

In simple terms, when buying a bridge crane, it is necessary to consider “how much, how frequently, what environment and what configuration”, which determine its core value and price.

Which crane to choose mainly depends on your specific needs. You can quickly judge from the following four core aspects:

-Single-beam bridge crane: it is suitable for conventional workshops with light and medium loads (usually ≤20 tons), medium span, and low frequency of use. It is the most economical and versatile choice.
-Double-girder bridge crane: used for heavy-duty, long-span, or high-work-level occasions (such as frequent hoisting, metallurgy, heavy-duty assembly). Its stability, durability, and safety are higher, but the cost is also increased accordingly.
-Free vertical crane (cantilever/column type): suitable for fixed working points and working conditions with limited rotation range, such as beside machine tools, maintenance areas, or production line stations, it can efficiently use corner space and be installed flexibly.
-Grab crane: It is specially used for the handling, loading, and unloading of bulk materials (such as grain, coal, sand, and gravel). The only reason to choose it is that you need to deal with such unpackaged loose materials.

In simple terms, you can filter according to this logic:

First, according to the lifting weight and span, choose between a single beam and a double beam.
If the scope of operation is highly concentrated and the space is limited, consider a free vertical.
If the handling object is bulk material, it points directly to the grab type.

Yes. Our bridge cranes fully comply with and follow relevant international standards. Our company has passed a number of international certifications, such as the ISO 9001 quality management system, which guarantees that the management system ensures every aspect of the product, from design to delivery, is under high standards of quality control. Therefore, you can rest assured that our cranes are internationally competitive in terms of safety and quality.
 
In order to ensure the versatility, safety, and reliability of our products on a global scale, we strictly follow the mainstream international standard systems, including the International Electrotechnical Commission (IEC), European (EN/DIN), and the United States (ANSI/ASME) in the design and manufacturing process. For example, for the EU market, our products meet the detailed requirements of the Machinery Directive and CE certification. At the same time, we also actively adapt to specific regulations in other regions to meet the compliance needs of different customers.

Delivery times largely depend on whether the crane is standard or customized. Based on our experience, standard single-girder and double-girder cranes can be produced more quickly, while cranes with special spans, duty ratings, or environmental requirements naturally require additional engineering design time.

For each quotation, we provide an estimated production and delivery schedule based on your configuration and destination. Throughout the manufacturing process, our team maintains communication with the customer to ensure no unexpected issues arise before shipment.

Compared with many suppliers, Yangyumech mainly reflects the two differentiated advantages of high customization flexibility and clear international compliance when providing bridge cranes.

On the one hand, we focus on in-depth customized services. According to your specific needs, we can provide fully customized solutions on core parameters such as rated load capacity, span, and lifting height, and accept personalized requirements. This means that what you get is not a standard product, but exclusive equipment that accurately matches the working conditions of your workshop.

On the other hand, we attach importance to international standards and quality certification. Our products clearly meet the requirements of international certifications such as CE, which ensures that their safety and reliability can meet the mainstream standards of the international market, and provides you with additional quality confidence guarantees. Combined with our direct supply capabilities as a powerful factory, we can achieve better comprehensive value for you while obtaining compliant and customized products.

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Yangyumech is a leading professional manufacturer of cranes in China. Our company integrates the processes of crane research and development, manufacturing, sales and service.