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Introduction to Double Girder Overhead Cranes

A double girder overhead crane is a robust material handling equipment designed to lift and transport heavy loads in industrial settings. Engineered with two parallel main girders, it delivers superior stability and load-bearing capacity compared to single girder models, making it the go-to choice for heavy-duty applications such as steel mills, impianti di produzione, magazzini, e cantieri. Whether you need to move machinery, materie prime, or finished products, our double girder overhead cranes combine precision, durata, and safety to optimize your workflow.

What is a Double Girder Overhead Crane?

A double girder overhead crane is a type of bridge crane consisting of two horizontal main girders supported by end trucks (or end carriages) that run along elevated rails (runways) mounted on building columns or standalone structures. The crane’s lifting mechanism—typically a hoist or trolley—is mounted on a trolley that travels along the length of the main girders, allowing 360° coverage of the workspace below.

Unlike single girder overhead cranes, which rely on a single main beam, double girder designs distribute weight more evenly, enabling them to handle much heavier loads (often up to 500 tons or more). This makes them essential for industries requiring frequent heavy lifting, where reliability and safety are non-negotiable.

Key Features of Double Girder Overhead Cranes

Our double girder overhead cranes are built to excel in demanding environments. Here are their standout features:

• 1. Elevata capacità di carico: Designed to handle heavy loads from 10 tonnellate fino a 500 tonnellate, making them ideal for heavy-industry applications.
• 2. Superior Stability: Two main girders distribute weight evenly, reducing sway and ensuring stable operation even with maximum loads.
• 3. Extended Span Options: Available with spans from 10 metri a 35 metri, adaptable to large workspaces like warehouses or factory floors.
• 4. Controllo di precisione: Equipped with advanced hoisting and trolley mechanisms for smooth, accurate positioning of loads—critical for delicate or high-value materials.
• 5. Costruzione durevole: Made from high-strength steel with anti-corrosion coatings, ensuring long-term performance in harsh conditions (PER ESEMPIO., high temperatures, polvere, or moisture).
• 6. Sicurezza migliorata: Integrated safety features include overload protection, pulsanti di arresto di emergenza, finecorsa, and anti-collision devices to prevent accidents.
• 7. Progettazione personalizzabile: Can be tailored with optional extras like remote control, frequency inverters for variable speed, or specialized hooks for unique load types (PER ESEMPIO., bobine, contenitori).

Specifiche tecniche

Structure of a Double Girder Overhead Crane

A double girder overhead crane consists of several key components working together to ensure efficient lifting and movement:

1. Main Girders

Main Girders

Two parallel steel beams (travi) that form the bridge structure. They bear the load of the trolley and the lifted material, requiring high strength and rigidity.

2. Fine dei camion (Fine delle carrozze)

Fine dei camion

Mounted at both ends of the main girders, these house the wheels and motors that drive the crane along the runway rails.

3. Carrello

Carrello

A movable unit that travels along the top or bottom of the main girders. It carries the hoist and is powered by its own motor for horizontal movement.

4. Paranco

Paranco

The lifting mechanism, including a crane drum, wire rope/cable, E Crane Hook. It is responsible for raising and lowering loads, with options for electric or hydraulic operation.

5. Impianto Elettrico

Impianto Elettrico

Includes motors, control panels, switches, and wiring to power and operate the crane, carrello, e paranco.

6. Dispositivi di sicurezza

Limitatore dell'altezza di sollevamento

Overload limiters, finecorsa di corsa, sistemi di arresto di emergenza, and anti-sway devices to ensure safe operation.

Domande frequenti: Gru a ponte a doppia trave

Q1: What’s the difference between a double girder and single girder overhead crane?

UN: Double girder cranes have two main girders, offering higher load capacity (10+ tonnellate) and stability, making them suitable for heavy-duty use. Single girder cranes have one main girder, are lighter, and better for lighter loads (fino a 10 tonnellate) in smaller workspaces.

Q2: Which industries use double girder overhead cranes?

UN: They are widely used in steel mills, automotive manufacturing, cantieri navali, cantieri, magazzini (for heavy pallet handling), and power plants.

Q3: How often should a double girder overhead crane be maintained?

UN: Routine inspections (daily checks for wear, lubrificazione) and professional maintenance (every 6–12 months) are recommended to ensure safety and longevity.

Q4: Can double girder cranes be customized for specific applications?

UN: SÌ. We offer customizations for load capacity, arco, altezza di sollevamento, sistemi di controllo, and specialized attachments (PER ESEMPIO., magnets for metal handling, grabs for bulk materials).

Q5: Are double girder overhead cranes compliant with international safety standards?

UN: Our cranes meet ISO, Fem, and OSHA standards, with built-in safety features to ensure compliance with global industrial regulations.

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