Double Girder Overhead Crane

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, fábricas, armazéns, e canteiros de obras. Whether you need to move machinery, matérias-primas, ou produtos acabados, our double girder overhead cranes combine precision, durabilidade, 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 toneladas ou mais). 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. Alta capacidade de carga: Designed to handle heavy loads from 10 tons up to 500 toneladas, 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 metros para 35 metros, adaptable to large workspaces like warehouses or factory floors.
• 4. Controle de precisão: Equipped with advanced hoisting and trolley mechanisms for smooth, accurate positioning of loads—critical for delicate or high-value materials.
• 5. Construção Durável: Made from high-strength steel with anti-corrosion coatings, ensuring long-term performance in harsh conditions (Por exemplo, altas temperaturas, pó, or moisture).
• 6. Segurança aprimorada: Os recursos de segurança integrados incluem proteção contra sobrecarga, botões de parada de emergência, interruptores de limite, and anti-collision devices to prevent accidents.
• 7. Design personalizável: Can be tailored with optional extras like remote control, frequency inverters for variable speed, or specialized hooks for unique load types (Por exemplo, bobinas, contêineres).

Especificações técnicas

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 (girders) that form the bridge structure. They bear the load of the trolley and the lifted material, requiring high strength and rigidity.

2. Caminhões finais (End Carriages)

Caminhões finais

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

3. Carrinho

Carrinho

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. Içar

Içar

The lifting mechanism, including a crane drum, wire rope/cable, e gancho de guindaste. It is responsible for raising and lowering loads, with options for electric or hydraulic operation.

5. Sistema Elétrico

Sistema Elétrico

Includes motors, painéis de controle, interruptores, and wiring to power and operate the crane, carrinho, e içar.

6. Dispositivos de segurança

Limitador de altura de elevação

Overload limiters, interruptores de limite de viagem, sistemas de parada de emergência, and anti-sway devices to ensure safe operation.

Perguntas frequentes: Double Girder Overhead Crane

1º trimestre: What’s the difference between a double girder and single girder overhead crane?

UM: Double girder cranes have two main girders, offering higher load capacity (10+ toneladas) and stability, making them suitable for heavy-duty use. Single girder cranes have one main girder, são mais leves, and better for lighter loads (até 10 toneladas) in smaller workspaces.

2º trimestre: Which industries use double girder overhead cranes?

UM: They are widely used in steel mills, automotive manufacturing, estaleiros, canteiros de obras, armazéns (for heavy pallet handling), and power plants.

3º trimestre: How often should a double girder overhead crane be maintained?

UM: Inspeções de rotina (daily checks for wear, lubrificação) and professional maintenance (every 6–12 months) are recommended to ensure safety and longevity.

4º trimestre: Can double girder cranes be customized for specific applications?

UM: Sim. We offer customizations for load capacity, período, altura de elevação, control systems, and specialized attachments (Por exemplo, magnets for metal handling, grabs for bulk materials).

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

UM: Our cranes meet ISO, Fem, e padrões OSHA, with built-in safety features to ensure compliance with global industrial regulations.

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