30t Gantry Crane Double Beam
Products Description
What is a Double Beam Gantry Crane?
A double beam (double girder) gantry crane features two parallel girders that support the lifting mechanism (trolley and hoist). The crane is supported by legs mounted on rails or wheels, forming a "gantry" structure that can straddle a workspace.
For a 30-ton capacity, the double beam design offers the structural strength and stability needed for safe and efficient heavy lifting operations.
🔩 Main Features of a 30t Double Girder Gantry Crane
Lifting Capacity: 30 tons (30,000 kg)
Structure: Two main girders (beams) connected to supporting legs
Span: Customizable, typically between 10–35 meters
Lifting Height: Depends on application, often 6–12 meters or more
Travel Mode: Rail-mounted or rubber-tired (mobile)
Hoist Type: Electric wire rope hoist or trolley with motorized winch
Control System: Cabin, pendant control, or wireless remote
⚙️ Key Components
Double Main Girders: Heavy-duty beams for high load-bearing capacity.
Legs (Supports): Rigid vertical structures transferring load to ground or wheels.
End Carriages: Connect legs to ground wheels or tracks; enable crane movement.
Trolley Hoist: Moves along the beams; lifts and lowers the load.
Wheels/Rails: Enable crane movement across large work areas.
Electrical System: Powers the motors for lifting and movement; includes safety features.
✅ Advantages
High load capacity and stability
Suitable for heavy industrial lifting
Wide operational range and span
Durable and robust for outdoor use
Can be custom-built for specific work environments
🛠 Typical Applications
Precast concrete yards
Steel fabrication plants
Container yards
Bridge construction sites
Heavy equipment assembly areas
Core Components：PLC, Engine, Gear, Motor, Trolley
Place of Origin：Henan, China
Warranty：1.5 years
Weight (KG)：125000 kg
Video outgoing-inspection：Provided
Machinery Test Report：Provided
Application：Outdoor/Factory
Working class：A5
Lifting Weight： 20-450 Ton
Steel track：43kg/m QU70
Voltage：3-Phase A.C.50HZ 380V
Lifting mechanism：Trolly
Crane type：Heavey Duty Gantry Crane
Lifting speed：0.48~4.8m/min
Travelling speed：3~30m/min
Steel material：Q355B
Pictures & Components
1.Double Main Girders (Beams)
Two parallel steel girders form the main horizontal structure.
Designed to support a 30-ton lifting capacity.
Typically fabricated as box-type or welded H-beams.
May be equipped with walkways for maintenance access.
Lifting & Hoisting Mechanism
Trolley
Moves along the length of the main girders.
Carries the hoisting mechanism and enables side-to-side movement of the load.
Hoist
Performs the lifting and lowering of the load.
Usually an electric wire rope hoist or winch.
Includes:
Motor
Gearbox
Drum and Wire Rope
Hook Block
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3.End Carriages
Located at the ends of the girders, linking the legs and main beam.
Contain the travel wheels and drive motors for horizontal crane movement.
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4.Mobility System
Crane Wheels
Mounted on the end carriages or base of the legs.
Allow the entire gantry crane to move along ground rails.
Driven by crane travel motors and gearboxes.
Rail or Track System (for rail-mounted cranes)
Steel rails laid on the ground or embedded in concrete.
Guide the crane's movement across the work area.
5.Trolley travelling mechanism
1) Structural composition
Trolley frame: The trolley frame serves as the main structural component that houses all the parts of the trolley. It is typically made of steel to handle the stresses and loads. The frame supports the hoist unit and is designed to be strong yet lightweight enough to move efficiently.
Wheels: The trolley is mounted on wheels, which run along rails positioned on the gantry structure. These wheels are typically made of hardened steel to withstand wear and tear.
Drive device: The drive mechanism consists of an electric motor or hydraulic system, depending on the crane's design. The motor is connected to the reduction gear system, which reduces the speed while increasing the torque required to move the trolley.
2) Function of the trolley operating mechanism
Drive System: It typically involves an electric motor connected to a gearbox, which powers the trolley's movement along a set of rails or tracks mounted on the crane's structure. The motor can be controlled to move the trolley in both directions, providing flexibility and control in positioning the load.
Load Positioning: The trolley can move the load across the length of the crane's beam, allowing operators to place loads in precise locations, often over long distances. This is especially useful for tasks such as loading and unloading materials from trucks or containers.
Horizontal Movement: The trolley traveling mechanism enables the crane to move the hoist horizontally along the beam or girder of the crane. This allows the crane to position the load accurately over a specific area.
Crane wheel
A crane wheel is an essential component of a Fixed Gantry Crane, which is a type of crane used for lifting and transporting heavy loads. The crane wheel is specifically designed to allow the gantry crane to move along a track or rail system, either within a fixed area or along a specific route.
1) Function of wheels
The wheels are designed to run along specific rails or tracks, which can be fixed to the ground or part of a larger moving system. The track's design must match the wheel's size and alignment for optimal performance.The crane wheels help evenly distribute the weight of the gantry crane and the loads it carries, ensuring stability during lifting and travel.
2) Design requirements
These wheels are designed with a strong tread surface to ensure traction and smooth movement along the crane rail system. The design often includes grooves to help maintain the alignment of the crane on the track.The crane wheel is typically made from high-strength steel or alloy material to withstand the heavy loads and continuous stress during operation.Crane wheels come in various sizes depending on the crane's load capacity and the specific application. Larger wheels are used for higher-capacity cranes and longer travel distances.
7.Crane Hook
The crane hook of a fixed gantry crane plays a crucial role in lifting and moving loads.The hook is typically made from high-strength steel to withstand the load-bearing forces during lifting operations.It is designed with a curved shape to securely hold the load by either a chain, rope, or sling.It may have a latch or safety mechanism to prevent the load from slipping off during lifting.
A fixed gantry crane has a stationary or rigid structure that supports the crane's lifting mechanisms. The crane hook is mounted at the end of a trolley, which moves along the crane's horizontal track.The crane hook's position is controlled by a hoisting mechanism, allowing it to raise and lower loads at specific locations.
The crane hook is designed to lift heavy materials such as construction beams, containers, or other large items.It works in conjunction with the crane's hoist, which raises and lowers the hook, allowing it to precisely handle and position heavy loads.
A latch or safety pin may be incorporated into the crane hook to prevent the load from disengaging during movement.Anti-rotation features may also be present to ensure the hook does not spin or swing uncontrollably.
Motor
The motor of a fixed gantry crane plays a crucial role in driving the crane's movements. Fixed gantry cranes are large, heavy-duty machines typically used for lifting and transporting materials over fixed, defined areas. These cranes consist of a hoist, trolley, gantry, and a motorized drive system.
The motors in a fixed gantry crane are typically electric motors.Common types include AC induction motors for simplicity, efficiency, and reliability, or DC motors for more precise speed control.Typically, the motor is located on the crane's trolley, or sometimes on the gantry frame, depending on the crane's design.
The motor powers the hoist, which is responsible for lifting and lowering the load.The motor drives the trolley (for horizontal movement) along the rail system.Some gantry cranes, particularly those with rotating capability, use motors to rotate the crane structure (if applicable) for precise load positioning.The motor's power is determined by the weight capacity of the crane. Larger gantry cranes, designed for heavier loads, will use more powerful motors.The motor's speed can be controlled using variable frequency drives (VFDs), allowing precise movement control.
The motor of a fixed gantry crane is the key component that drives the lifting, movement, and positioning of heavy loads. The type and power of the motor depend on the crane's design and operational requirements, and proper motor maintenance is essential for safe and efficient crane operation.
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Sound and light alarm system & limit switch
1) Sound and light alarm system
A sound and light alarm system for a fixed gantry crane is an essential safety feature that ensures the well-being of workers, nearby equipment, and the surrounding environment. Such systems are designed to alert personnel of potential hazards, operational status, or malfunctioning of the crane.
Sound Alarms (Audible Signals):Buzzers/Alarm Horns: High-decibel sound emitters alert people about specific conditions (e.g., crane movement, lift in progress, emergency shutdown).Alarm Tones: Different sounds can correspond to different situations (e.g., continuous siren for an emergency, intermittent beep for general operation).Volume Control: Ensures the alarm is audible across the worksite, even in noisy environments.
Light Signals (Visual Indicators):Flashing Lights: High-intensity flashing lights (typically red, yellow, or green) are used to visually signal the crane's operation status. For example:
Red Flashing Light: Indicates emergency or dangerous conditions.
Yellow Flashing Light: Signals that the crane is in operation or moving.
Green Light: Can indicate that the crane is idle or that it is safe to approach.
2) Limit switch
A limit switch on a fixed gantry crane is a safety device used to prevent the crane's movement from exceeding a predetermined limit. It helps ensure that the crane's components (like the hoist, trolley, or gantry) do not move too far in any direction, preventing mechanical damage, accidents, or unsafe operations.
Functions of the Limit Switch:Position Limiting: The limit switch detects when the crane's trolley, hoist, or gantry has reached the end of its travel range and cuts off power to prevent further movement.Safety: It acts as a fail-safe mechanism to prevent the crane from operating outside safe boundaries.Prevents Overtravel: Ensures that the crane's lifting mechanism does not go beyond the safe limits, avoiding damage to the crane or load.Load Protection: Prevents the crane from lifting or lowering a load too far, ensuring load integrity and preventing accidents.
Mechanical Limit Switches: These are physically actuated by the movement of the crane parts. They can be either roller-type, lever-type, or plunger-type switches.Electrical Limit Switches: These use sensors or electrical circuits to detect the position of the crane components.
10.Safety Devices
1) Overload protection device:Prevents the crane from lifting loads that exceed its rated capacity, reducing the risk of structural failure or tipping.
2) Limit Switches (Travel and Hoist Limits):Ensures that the crane's trolley, hoist, or gantry does not move beyond a certain predefined position, preventing damage to the crane structure or surrounding equipment.
3) Emergency Stop Button: Provides an immediate means to stop the crane in case of an emergency.
4) Anti-Sway Control: Minimizes the swaying or swinging of the load, which can lead to accidents or damage.
5) Load Moment Indicator (LMI):Provides real-time data on the crane's stability by measuring the moment or force exerted by the load.
6) Horn and Warning Lights: Alert workers in the vicinity of the crane to its operation, especially when it's moving heavy loads or in restricted areas.
11.Control Mode
1) Manual control: The crane is operated manually by an operator using a control panel or joystick to control the movements of the crane. This is the simplest mode, where the operator has direct control over the hoist, trolley, and gantry motion.
2) Semi-Automatic Control:The crane can be operated in semi-automatic mode where certain movements (such as hoisting or trolley movement) are automated, but the operator still has some manual control over other functions.
3) Fully Automatic Control:In fully automated mode, the crane is controlled by an onboard computer system, with minimal or no human intervention. These systems can manage complex lifting, loading, and unloading operations based on pre-programmed instructions or real-time sensor data.
4)Radio Remote Control: This mode allows the crane to be controlled remotely using a handheld radio transmitter. It provides flexibility for operators to work from different points, improving safety and productivity in environments where the crane is operating over large or hazardous areas.
5) Joystick Control:This is often used in manual or semi-automatic modes, where the operator uses a joystick to control the crane's movements. It allows for precise control of the lifting load, especially for tasks requiring fine movements or in restricted spaces.
12.Sketch
Main technical
Advantages
1. High Lifting Capacity and Stability
With two main girders, the crane distributes weight more evenly, making it suitable for heavy-duty lifting up to 30 tons.
Ideal for handling oversized, bulky, or dense loads like concrete beams, steel plates, machinery, and containers.
✅ 2. Wider Span and Greater Hook Height
Supports larger span widths than single girder models, covering a broader work area.
Offers greater lifting height, as the trolley rides between the girders instead of under them.
✅ 3. Better Load Distribution
The load is shared across both girders, reducing structural stress and increasing crane lifespan.
Improves safety and operational reliability under heavy loads.
✅ 4. Improved Rigidity and Reduced Deflection
Double beam construction provides superior stiffness, especially under dynamic loading.
Reduces beam deflection, maintaining alignment and safety during frequent or heavy use.
✅ 5. Customization and Versatility
Easily customizable with:
Cabin or remote control
Anti-sway systems
Auxiliary hoists
Variable span and lifting height
Can be configured for indoor or outdoor applications, including ports, rail yards, and fabrication plants.
✅ 6. Enhanced Safety Features
Accommodates more advanced safety systems like overload protection, emergency stops, windproof locks, and limit switches.
Supports installation of maintenance platforms and access ladders for service convenience.
✅ 7. Long Service Life
Built for continuous heavy-duty operation, especially when made with high-grade steel and precision-welded joints.
Suitable for demanding industries such as construction, mining, shipbuilding, and precast manufacturing.
Application:
A 30t double girder gantry crane is designed for heavy-duty material handling in large, open workspaces. Its high lifting capacity and structural stability make it ideal for industries where large, heavy, or irregular-shaped loads are frequently handled.
Here are the key application areas:
🧱 1. Precast Concrete Yards
Lifting and transporting precast concrete segments, such as beams, walls, and bridge components.
Essential for bridge construction, metro rail segments, and infrastructure projects.
🛳️ 2. Shipbuilding and Marine Yards
Handling large ship parts such as hull sections, engines, and assemblies.
Used for ship repair, dry dock operations, and movement of heavy marine machinery.
🏗️ 3. Construction Sites
Used for bridge girder placement, pillar assembly, and heavy load lifting.
Offers flexibility in temporary or large-scale infrastructure construction projects.
🏭 4. Steel Mills and Heavy Manufacturing
Moving steel plates, coils, billets, structural steel, and fabrication parts.
Ideal for assembly lines and workstations in industrial manufacturing plants.
🚉 5. Railway Yards and Train Depots
Lifting rails, bogies, train parts, and full railcars during assembly or repair.
Supports rail infrastructure and metro system development.
🧰 6. Machinery and Equipment Handling
Installation and relocation of industrial machinery, transformers, or heavy equipment.
Used in energy plants, equipment yards, and large workshops.
🏗️ 7. Container and Logistics Yards
Lifting and moving empty or loaded containers (up to 30 tons).
Serves in container terminals, freight yards, and inland ports.
🧪 8. Power Plants and Turbine Assembly
Used in nuclear, hydro, and thermal power stations to lift generators, rotors, and turbines.
Also used in wind energy projects for handling tower segments or nacelles.
Crane production procedure
Specification Requirements: Understand the specific requirements for the crane, such as load capacity, span, lifting height, and environmental factors (indoor/outdoor, temperature, etc.).Structural Design: Design the crane structure, including the gantry frame, lifting mechanism, and foundation, using CAD software to ensure strength, stability, and safety.Mechanical Design: Design the trolley, hoist, and other mechanical systems required for crane operation.Electrical Design: Design the electrical components, including control panels, motors, and safety systems.
Steel Plates and Sections: High-quality steel is ordered for the crane's structural components (columns, beams, etc.).Motors and Components: Motors for the trolley, hoist, and other control systems are procured from suppliers.Welding Electrodes, Bolts, and Fasteners: Necessary consumables for welding and assembly.Control Systems: Electrical components such as switches, relays, and sensors are acquired for the crane's control systems.
Cutting and Shaping: Steel plates and sections are cut to the required dimensions using cutting machines, plasma cutters, or water jets.Welding: The steel components are welded together to form the gantry structure. This is done in parts: the base frame, legs, cross beams, and other elements.Machining: If necessary, machining operations (drilling, milling) are performed on parts to ensure accurate fitments.Surface Treatment: Components are cleaned and treated (such as shot blasting and painting) to prevent rusting and improve durability, especially if the crane will be used in outdoor environments.
Assembling the Gantry Frame: The base, legs, and cross beams are assembled into a complete gantry structure. This step may take place in a large workshop or on-site, depending on the crane's size and location.Mounting the Rails: The tracks for the crane's trolley are mounted onto the gantry beams. This is crucial for ensuring smooth operation.Hoist and Trolley Installation: The hoist, motor, and trolley assembly are mounted onto the rails. The hoist mechanism is integrated with the lifting chain or rope, and the motor is connected to the drive system.Electrical Installation: Wiring, control panels, switches, and safety systems are installed, ensuring the crane can be operated remotely and safely.
Mechanical Testing: Verify all mechanical systems are operating correctly, including the hoist, trolley, and gantry movement.Electrical Testing: Check the electrical components for functionality, including the control system, motors, and emergency stop features.Load Testing: Perform load testing to ensure the crane can lift the specified capacity without issues. This may involve loading the crane with test weights and running it through various motions.Safety Features Check: Ensure all safety systems, including limit switches, overload sensors, and emergency braking, function properly.
On-site Assembly (if necessary): For large cranes, parts may be transported to the installation site, where final assembly and setup are done.Final Adjustments: Any adjustments to the crane's alignment, wiring, or safety systems are made as necessary. Operator Training: If needed, operators are trained on how to use the crane safely and effectively, covering operation, maintenance, and safety procedures.
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%.
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