3 Ton Aluminum Gantry Crane for Sale
3 Ton Aluminum Lightweight Double-Girder Portable Gantry Crane for Shipboard Lifting

The main girders form the backbone of the crane and are carefully engineered to handle heavy loads while remaining lightweight.

Main Girder Specifications

• Material: High-strength aluminum alloy, corrosion-resistant for marine environments
• Configuration: Dual Epose rails per girder, designed to safely support 3-ton bending capacity
• Connections: Bolted splice plates with alignment pins allow fast assembly and accurate alignment
• Deflection Control: Designed to keep trolley movement smooth, preventing jerks or uneven lifting

By combining dual rails, precise bolted connections, and optimized aluminum profiles, the main girders provide the balance of strength, rigidity, and portability needed for shipboard lifting operations.

The crane's hoist and trolley system is designed to work seamlessly with the dual-rail aluminum girder structure, providing smooth, reliable lifting and movement even in tight shipboard spaces. It combines durability, low maintenance, and flexibility depending on operational requirements.

Key Features of the Hoist & Trolley

• Dual-Rail Compatibility: Works perfectly with the double Epose rail configuration for stable load travel
• Corrosion-Resistant Trolley: Low-friction wheels reduce wear and ensure smooth movement across the beam
• Flexible Hoist Options: Can be fitted with manual or electric hoists, depending on available shipboard power and lifting needs
• Integrated Pulley System: Built-in sheaves and pulleys in the horizontal beam simplify load routing and improve lifting efficiency

This system ensures that lifting operations are controlled, safe, and efficient, whether moving heavy parts across a deck or performing maintenance in confined areas.

A stable base is critical for shipboard lifting, especially when deck surfaces are uneven or slightly sloped. The crane features four independently adjustable aluminum legs, providing flexibility and safety for diverse marine conditions.

Key Features of the Base Structure

• Four Adjustable Legs: Each leg can be independently set to compensate for uneven deck surfaces
• Wide Load-Distribution Footpads: Spread the crane's weight evenly to protect the ship deck from pressure points
• Optional Wheel Sets: Allow limited movement when the crane is unloaded, making relocation simple without disassembly

This adjustable base ensures stability, safety, and adaptability, allowing the crane to perform reliably in a variety of shipboard scenarios.

Shipboard environments are harsh, with constant exposure to saltwater, humidity, and temperature changes. Selecting the right materials and protective treatments is essential to ensure the crane's long-term performance and safety.

Key Material & Protection Features

• Marine-Grade Aluminum: Used for girders, frames, and support structures to reduce weight while resisting corrosion
• Stainless Steel 316 Fasteners: Highly resistant to rust and pitting in marine conditions
• Protective Finishes: Anodized or epoxy-coated surfaces provide an extra barrier against saltwater and humidity
• Joint & Splice Treatment: Anti-corrosion treatment applied at bolted connections and splice points to maintain strength over time

These measures help the crane stay durable and reliable even in demanding shipboard operations.

Shipboard lifting equipment must be portable, easy to assemble, and storable. This crane's modular design addresses all these practical needs.

Key Modular Features

• Lightweight Components: All parts kept ≤ 50 kg for manual handling
• Quick-Fit Bolted Splices: Simple alignment pins and bolts allow fast assembly and disassembly without welding
• Compact Modules: Designed to fit easily into onboard storage spaces when not in use
• Minimal Tools Required: Installation can be completed with basic hand tools, reducing setup time and crew workload

This modular approach ensures the crane is ready to use quickly, easy to move between locations, and doesn't require heavy lifting equipment or complex procedures.

Safety is critical on ships, where space is limited and loads can shift unexpectedly. This gantry crane includes multiple safety features to protect both operators and equipment during lifting operations.

Key Safety Features

• Mechanical End Stops on Trolley: Prevent the trolley from running off the girder ends
• Overload Protection for Hoist: Stops lifting if the load exceeds the rated 3-ton capacity
• Emergency Stop Control: Immediate shutdown in case of unforeseen issues or hazards
• Load Limiters & Travel Limit Switches: Ensure safe operation within designed ranges and prevent collisions

These systems help crews lift and move heavy components safely, even in confined or unstable shipboard environments.

To ensure the crane performs reliably under both normal and challenging conditions, comprehensive structural verification is conducted. Marine conditions, including rolling and pitching of the vessel, are considered in all calculations.

Key Verification Measures

• Static and Dynamic Analysis: Assesses 3-ton load capacity plus ship motion factors
• Rail-to-Wheel Contact Stress Checks: Confirms the trolley moves smoothly without overstressing rails or wheels
• Fatigue Analysis: Evaluates repeated lifting cycles in marine environments to prevent premature wear
• Stability Checks: Ensures the crane remains secure and balanced under rolling and pitching conditions