50 Ton Outdoor Double Gantry Crane

 

A 50-ton outdoor double gantry crane is a heavy-duty lifting system designed for outdoor applications, such as construction sites, shipyards, ports, steel yards, and large industrial facilities. Here's a detailed breakdown of its features, components, and considerations:

Key Features:

High Load Capacity – Can lift up to 50 metric tons (or 50,000 kg), making it suitable for heavy machinery, containers, steel beams, and large industrial components.

Double Girder Design – Provides greater strength, stability, and hook height compared to single-girder cranes.

Outdoor Use – Built to withstand harsh weather conditions (rain, wind, dust, and extreme temperatures) with corrosion-resistant coatings and weatherproof electrical components.

Gantry Structure – Features two legs (supporting columns) that run on rails or wheels, allowing movement along a fixed track or ground surface.

Mobility Options:

Rail-Mounted – Moves on fixed tracks for precise positioning.

Rubber-Tired (Mobile Gantry) – Equipped with wheels for flexible movement (often used in shipyards or construction sites).

Hoisting Mechanism:

Electric or hydraulic hoist with wire rope or chain.

Optional auxiliary hoist for lighter loads.

Control System:

Pendant control (wired handheld remote).

Radio remote control (for safer, long-distance operation).

Cabin-operated (for very large cranes).

 

Comparison: Rail-Mounted vs. Rubber-Tired Outdoor Gantry Cranes

Feature	Rail-Mounted Gantry	Rubber-Tired Gantry (RTG)
Mobility	Fixed path (rails)	Moves freely on ground
Stability	Very stable	Requires outriggers
Installation Cost	Higher (needs rails)	Lower (no rails needed)
Maintenance	Less tire wear	Tires need replacement
Best For	Permanent outdoor yards	Ports, temporary sites

 

 

 

Lifting Capacity: 50 metric tons

Span (Width): Typically 5m to 30m (customizable)

Lifting Height: 6m to 20m (adjustable)

Travel Speed: 10–30 m/min (adjustable)

Power Supply: 380V/50Hz (3-phase) or customized

Control: Pendant, remote, or cabin-operated

A 50-ton outdoor double gantry crane is a heavy-duty lifting system designed for outdoor applications like shipyards, construction sites, and freight yards. It consists of several key components that ensure stability, durability, and efficient load handling in harsh weather conditions. Here are the main components:

1. Gantry Framework (Bridge & Legs)

Main Girder (Bridge): Typically a box girder or truss structure that spans the working area.

Legs (Support Columns): Two sets of legs (double gantry) on each side, providing stability.

Cross Beams: Reinforce the structure and distribute load forces.

2. Hoisting Mechanism

Electric Hoist/Winch: A 50-ton capacity hoist with a motor, gearbox, drum, and wire rope.

Hook Block & Sheaves: Heavy-duty lifting hook with multiple sheaves for smooth operation.

Braking System: Fail-safe brakes for secure load handling.

 

 

3. Trolley & Travel System

Trolley Frame: Moves along the bridge girder to position the load.

Trolley Wheels & Drive: Motorized wheels for longitudinal movement (along the girder).

4. End Carriages & Wheels

End Trucks: Houses the wheels and drive mechanisms for gantry travel.

Rail Wheels: Heavy-duty steel wheels that run on tracks (usually steel rails embedded in the ground).

 

5. Runway Rails & Foundation

Steel Rails: Installed on a concrete foundation to support the crane's movement.

Rail Clamps: Secures the crane when not in use (prevents wind movement).

 

6. Drive & Control System

Travel Motors: Electric or hydraulic motors for gantry movement.

Control Panel & Pendant/Remote: Operator-controlled via pendant station or wireless remote.

Variable Frequency Drives (VFDs): Ensures smooth acceleration/deceleration.

7. Safety & Protection Features

Limit Switches: Prevents over-travel of the hoist and trolley.

Anti-Collision System: For dual-gantry setups to avoid clashes.

Windproof Devices: Anchors or rail clamps to resist high winds.

Load Limiter: Prevents overloading beyond 50 tons.

Weatherproofing: Corrosion-resistant paint, sealed electrical components.

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8. Electrical & Power Supply

Festoon/Cable Reel System: Delivers power to the moving crane.

Outdoor Lighting: LED lights for night operations.

Additional Options

Cabin (Operator's Station): For cabs with joystick controls.

Weighing System: Integrated load measurement.

Automation: GPS or RFID-based positioning for precise load handling.

SKETCH

Main technical

 

A 50-ton outdoor double gantry crane is a heavy-duty lifting solution designed for rugged outdoor applications, such as construction sites, ports, shipyards, steel yards, and large-scale manufacturing. Here are its key advantages:

1. High Lifting Capacity (50 Tons)

Capable of handling extremely heavy loads, making it ideal for industries like shipbuilding, steel fabrication, and large machinery assembly.

The double-girder design provides better stability and strength compared to single-girder cranes.

2. Outdoor Durability

Built with weather-resistant materials (corrosion-proof coatings, high-grade steel) to withstand harsh environments (rain, wind, dust, saltwater).

Suitable for ports, shipyards, and construction sites where exposure to the elements is unavoidable.

3. Wide Span & Large Coverage

The double gantry structure allows for a longer span, covering a larger work area without needing additional support.

Ideal for moving heavy loads over rail tracks, storage yards, or assembly lines.

4. Mobility & Flexibility

Equipped with rubber-tired or rail-mounted wheels for smooth movement.

Some models feature motorized travel for precise positioning of heavy loads.

5. Enhanced Stability & Safety

Double legs provide superior balance, reducing sway when lifting heavy loads.

Includes safety features like overload protection, limit switches, anti-collision systems, and emergency brakes.

6. Customizable Options

Can be fitted with different hoists (wire rope/electric chain hoists).

Adjustable lifting height, span, and speed based on operational needs.

Optional remote control or cabin operation for better control.

7. Cost-Effective for Heavy Lifting

More economical than installing multiple smaller cranes.

Reduces dependency on mobile cranes for outdoor heavy lifting tasks.

8. Low Maintenance & Long Service Life

Designed for heavy-duty cycles with minimal maintenance requirements.

Sturdy construction ensures long-term reliability even in tough conditions.

 

A 50-ton outdoor double gantry crane is a heavy-duty lifting solution designed for handling large loads in open-air environments such as shipping yards, construction sites, steel mills, and ports. Here are its key applications and features:

Applications:

Ports & Shipyards – Loading/unloading heavy cargo, containers, and ship components.

Steel & Metal Industries – Moving steel coils, plates, and large metal structures.

Construction Sites – Erecting prefabricated structures,桥梁 segments, and heavy machinery.

Power Plants – Handling turbines, generators, and large equipment.

Railway & Heavy Machinery – Assembling and transporting locomotives and heavy parts.

Wind Energy – Installing turbine blades and nacelles in outdoor storage areas.

 

 

The production procedure for a 50-ton Outdoor Double Gantry Crane involves multiple stages, from design and material procurement to fabrication, assembly, testing, and installation. Below is a structured outline of the production process:

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1. Design & Engineering

Requirements Analysis: Determine load capacity (50-ton), span, lifting height, outdoor conditions (wind, corrosion resistance), and operational frequency.

Structural Design:

CAD modeling (AutoCAD, SolidWorks, or FEM analysis software).

Load calculations (static & dynamic loads).

Selection of materials (high-grade steel for outdoor durability).

Mechanical & Electrical Design:

Hoist mechanism (electric or hydraulic).

Trolley and end carriage design.

Power supply (cable reeling or conductor bars).

Control system (pendant/remote control, PLC if automated).

Regulatory Compliance: Ensure adherence to standards (ISO, FEM, DIN, OSHA, or local regulations).

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2. Material Procurement

Main Components:

Steel beams (girders, legs, cross beams).

Wheels, rails, and runway beams.

Electric hoist (or winch system).

Motors, gearboxes, brakes.

Electrical components (cables, sensors, control panels).

Corrosion Protection:

Galvanized steel or weather-resistant paint (epoxy coating).

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3. Fabrication

A. Structural Fabrication

Girders & Legs:

Cutting steel plates/beams (laser/plasma cutting).

Welding (submerged arc welding for high strength).

Machining (drilling, milling for bolt connections).

Cross Beams & Bracing:

Fabricate for stability and load distribution.

End Carriages & Wheels:

Assemble wheel blocks with bearings and drive mechanisms.

B. Mechanical Assembly

Hoist & Trolley:

Mount the hoist on the trolley frame.

Install gears, brakes, and limit switches.

Rail System:

Fabricate and align runway rails for smooth movement.

C. Electrical System

Wiring & Controls:

Install motors, sensors, and control panels.

Test electrical circuits (short-circuit, overload protection).

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4. Quality Control & Testing

Dimensional Inspection: Verify tolerances per design.

Non-Destructive Testing (NDT):

Ultrasonic/X-ray welding inspection.

Magnetic particle testing for cracks.

Load Testing:

Static Test: 1.25 × SWL (62.5 tons) to check deformation.

Dynamic Test: 1.1 × SWL (55 tons) for operational safety.

Functional Tests:

Hoist lifting/lowering.

Trolley and gantry travel.

Emergency stop and limit switches.

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5. Surface Treatment & Painting

Sandblasting: Remove rust and impurities.

Primer & Paint: Apply anti-corrosion coatings (zinc-rich primer + polyurethane topcoat).

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6. Disassembly & Packaging

Labeling: Mark components for easy reassembly.

Packaging: Protect delicate parts (electricals, bearings) during transit.

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7. Installation & Commissioning

Site Preparation:

Foundation for rails (concrete piers or embedded bolts).

Rail alignment and leveling.

Reassembly:

Erect gantry legs and girders.

Install mechanical/electrical systems.

Final Testing:

On-site load test.

Operator training.

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8. Documentation & Handover

Delivery of:

Operation & maintenance manuals.

Certificates (material, welding, load test reports).

Warranty details.

 

 

 

 

 

 

 

Material Inspection

Quality Inspection: Strict quality inspection is carried out on the purchased raw materials to ensure that they meet the design requirements and national standards.

Material Storage: Qualified materials are stored according to classification to prevent corrosion or damage.

Cutting and Forming

Steel Cutting: Use plasma cutting, laser cutting or flame cutting and other technologies to cut the steel according to the size of the design drawing.

Forming Processing: Form the steel plate through bending, rolling, welding and other processes to manufacture the main beam, end beam and other structural parts.

Welding

Component Welding: The cut and formed steel parts are welded into the main structures such as the main beam, end beam and trolley. The welding process needs to be strictly controlled to ensure the structural strength and welding quality.

Weld Inspection: Use non-destructive testing technology (such as ultrasonic testing, radiographic testing) to inspect the welds to ensure that there are no cracks or other defects.

Machining

Precision Machining: Precision machining is performed on the key components of the crane, such as wheel sets, bearing seats, pulleys, etc., to ensure their dimensional accuracy and surface quality.

Assembly of the whole machine

General assembly: On the basis of pre-assembly, the overall assembly of the crane is carried out, including the final installation of the main beam, end beam, lifting mechanism, walking mechanism, etc.

Commissioning and testing

Under dynamic conditions, the operating performance of the crane is tested, including the testing of lifting, walking, steering and other functions. The overall size of the assembled bridge crane is checked to ensure that all dimensions meet the design requirements.

Spraying and anti-corrosion treatment

Surface treatment Rust removal: Rust removal on the surface of the crane, common methods include sandblasting, pickling, etc. Primer spraying: Spray anti-corrosion primer on the treated surface to prevent metal oxidation and corrosion. Topcoat spraying Color spraying: Spray topcoat according to customer requirements or industry standards to give the crane a protective and decorative effect. Marking: After spraying, mark the crane's identification information in accordance with the specifications, such as model, rated load, etc.

Factory and installation

Packaging and transportation

Packaging protection: Protectively package the key components of the crane to prevent damage during transportation. Transportation arrangement: According to the equipment size and transportation conditions, select a suitable transportation method to transport the crane to the customer's site.

Acceptance and delivery

Customer acceptance

On-site acceptance: The customer conducts on-site acceptance of the crane according to the contract requirements and technical specifications to check the performance and quality of the equipment.

Problem rectification: If any problems are found, the manufacturer needs to rectify them in time to ensure that the equipment fully meets the customer's requirements. Delivery and use Operation training: The manufacturer usually trains the customer's operators to ensure that they can operate the crane correctly and safely.

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