70 Ton Double Girder Gantry Crane

The 70 ton double girder gantry crane is a heavy-duty, rail-mounted industrial lifting equipment designed for ultra-heavy load handling in outdoor and semi-outdoor working environments. Adopting a robust double main girder structural design, this gantry crane delivers superior load-bearing capacity, structural stability, and operational durability compared with single girder models. It is professionally engineered to handle maximum rated loads of 70 tons, covering large-span, high-frequency, and high-precision lifting, transferring, and stacking operations for bulky and heavy materials. Widely applicable to construction sites, steel mills, shipyards, port terminals, logistics yards, and heavy machinery manufacturing workshops, this crane serves as core lifting equipment for heavy industrial production and engineering construction.

70 Ton double girder gantry crane

Manufactured in strict accordance with international ISO and CE safety standards, the 70-ton double girder gantry crane features optimized mechanical structure, intelligent control system, and reliable safety protection devices, ensuring long-term stable operation under harsh working conditions such as high load, dust, and variable weather. It balances high working efficiency, operational safety, and energy-saving performance, meeting the heavy-duty production demands of modern industrial enterprises.

Core Structural Features

1. Optimized Double Girder Main Structure

The crane adopts a high-strength box-type double girder structure, which effectively disperses heavy load pressure and reduces structural deformation during long-span operation. Compared with single girder gantry cranes, the double girder design greatly improves overall rigidity, bending resistance, and torsional resistance, ensuring no obvious deflection under full-load 70-ton working conditions. The main girder is made of high-quality low-alloy structural steel, with integral welding and stress relief treatment, effectively eliminating internal structural stress and extending the service life of the equipment. The standardized walking platform, safety guardrails, and maintenance ladders are installed on the top of the main girder, facilitating daily inspection and maintenance for operators.

70 ton double girder gantry crane

2. Stable Support and Traveling Mechanism

Equipped with reinforced rigid or flexible outriggers, the crane realizes stable gantry framing and uniform load distribution. The flexible outrigger design can effectively buffer structural stress caused by temperature changes and operational vibration, avoiding structural damage and improving overall operational stability. The traveling mechanism adopts heavy-duty track wheels and high-precision drive motors, matching standard railway rails or custom heavy-duty rails. It realizes smooth linear traveling with low noise and low friction, ensuring accurate positioning during long-distance material handling.

3. High-Performance Lifting Trolley

The matched heavy-duty lifting trolley is equipped with a professional 70-ton grade hoisting mechanism, featuring compact structure, strong overload resistance, and high transmission efficiency. The trolley supports transverse traveling along the main girder, cooperating with the crane’s longitudinal traveling to realize three-dimensional flexible operation. The low-clearance trolley design maximizes the effective lifting height and expands the operating space, adapting to various complex on-site working conditions.

Outstanding Product Advantages

1. Super Heavy Load Capacity and High Stability

With a rated lifting capacity of 70 tons, this double girder gantry crane easily copes with ultra-heavy material handling tasks. The scientific double girder structural layout ensures small structural deformation and strong anti-vibration ability during full-load operation, with accurate lifting and positioning, effectively avoiding load shaking and offset, and improving the safety and accuracy of heavy object handling.

2. Smooth and Efficient Operation

Adopting advanced variable frequency speed regulation (VFD) control system, the crane realizes stepless speed adjustment for lifting, trolley traveling, and crane traveling. It effectively solves the problems of start-stop impact and load jitter of traditional cranes, making the whole operation process stable and smooth. The intelligent control mode improves working efficiency by 20%-30% compared with ordinary cranes, suitable for high-frequency continuous lifting operations.

Gantry crane trolley

3. Strong Environmental Adaptability

Designed for outdoor harsh working environments, the whole machine adopts anti-rust painting, rainproof, dustproof, and sun-proof protection technologies. All electrical components are equipped with sealed protective devices, which can stably operate in high temperature, low temperature, windy, and dusty environments. The equipment supports customized wind-proof, anti-corrosion, and cold-resistant configurations to meet the operational needs of different regions and working conditions.

4. Low Maintenance and Long Service Life

The whole machine adopts standardized and modular component design, with reasonable structural layout and convenient disassembly and maintenance. Key wearing parts are made of high wear-resistant materials, reducing replacement frequency and later maintenance costs. After stress relief treatment and strict quality testing, the steel structure has stable performance and a service life of more than 15 years under normal working conditions.

Complete Safety Protection System

Safety is the core design focus of the 70-ton double girder gantry crane, which is equipped with a full set of intelligent safety protection devices to eliminate operational risks in all directions:

70 Ton double girder gantry crane

• ◆ Overload protection device: Automatically cut off the lifting power and trigger an alarm when the load exceeds the rated 70 tons to prevent overload operation accidents;
• ◆ Height limit device: Set upper and lower limit protection for lifting stroke to avoid equipment damage caused by over-winding and over-releasing of steel wire ropes;
• ◆ Travel limit device: Install limit switches at both ends of the track to prevent the crane and trolley from derailing and collision caused by over-traveling;
• ◆ Wind-proof and anti-slip device: Equipped with professional wind-proof clamps and rail brakes, which can firmly fix the crane on the track in strong wind weather to avoid sliding and overturning;
• ◆ Emergency stop system: Equipped with manual emergency stop buttons in the operating room and remote control terminal, which can quickly cut off all power in case of abnormal conditions;
• ◆ Real-time monitoring system: Optional intelligent monitoring module, which can real-time display operating parameters such as load, height, traveling speed, and equipment operation status, and record operation data for safety traceability.

Technical Parameters (Standard Model)

Wide Application Scenarios

The 70 ton double girder gantry crane is widely used in various heavy industrial fields that require large-load and large-span lifting operations. Its stable performance and high adaptability make it the preferred lifting equipment for heavy industry production and large-scale engineering projects. The main application scenarios include:

• ◆ Port and Terminal Logistics: Lifting and transferring heavy containers, steel materials, and port cargo;
• ◆ Steel and Metallurgical Industry: Handling steel coils, steel plates, and heavy metallurgical equipment;
• ◆ Shipyard Engineering: Hoisting ship components, mechanical equipment, and shipbuilding materials;
• ◆ Construction and Bridge Engineering: Lifting prefabricated components, steel structures, and large construction equipment;
• ◆ Heavy Machinery Manufacturing: Assembling and transferring large mechanical parts and complete equipment;
• ◆ Mining and Yard Storage: Stacking and handling heavy bulk materials and mechanical equipment.

Customization and After-Sales Service

We provide full personalized customization services for the 70-ton double girder gantry crane. According to customer’s on-site working conditions, we can customize different spans, lifting heights, working speeds, support leg types, and anti-corrosion, wind-proof, and explosion-proof configurations. Meanwhile, we support multiple control mode combinations and auxiliary device configurations (such as spreader, grab, intelligent monitoring system) to meet diverse customer production needs.

All our gantry cranes are equipped with professional after-sales service, including factory direct sales, one-year free warranty, lifelong technical support, on-site installation and commissioning, operator training, and regular equipment maintenance services. We ensure that customers can use the equipment safely, efficiently, and stably for a long time.

Weihua Factory