Reliable Lifting with Double Girder Overhead Cranes

Our dedicated service team of crane industry veterans is dedicated to keeping your cranes up and running on site, and is ready to provide 24/7 after-sales service, maintenance, relocation and upgrade services. With years of crane expertise and experience, SEVENCRANE always provides excellent customer service. Our engineers receive continuous safety training and stay up to date on products, solutions and technologies on the market. Most importantly, our technicians are trained to focus on preventive measures, detecting subtle repair issues to avoid failures of more expensive components.

The structure of a double girder bridge crane is a compact yet robust system, designed for efficient handling of medium to heavy-duty loads. By understanding its core components-such as the main girders(bridge), hoist, and end trucks, operators can optimize crane performance, reduce wear and tear, and ensure smooth operations. A clear understanding of the crane’s structure empowers users to operate safely, minimize downtime, and maximize productivity and longevity.

Core Components

Bridge: A load-bearing beam that runs the width of the building. This is the primary structural component that connects the runways and moves the hoist forward and backward using a trolley. A bridge can be comprised of one or two beams-more often referred to as a single girder or double girder design. Girders can be made of rolled steel or can be fabricated by welding the beams into a steel box design.

Winch Drum and Ropes: The Winch drum winds and unwinds the steel ropes that are attached to the bulk, controlling the vertical movement of the lifted load. High-tensile ropes are used to ensure the safety and durability of the hoisting system.

Trolley Motor: The trolley of the double girder bridge crane is powered by motors that allow it to move horizontally along the crane’s main beams, positioning the hoist directly above the load being lifted or placed.

End Truck: Located at each end of the crane, the end trucks enable the gantry crane to travel along the rails using a set of wheels that run smoothly on the tracks. Depending on the crane’s capacity, each end truck can be equipped with 2, 4, or 8 wheels, ensuring optimal stability and performance.

Hook: The hook is ideal for general lifting tasks, providing a reliable connection for lifting and moving loads safely. Additionally, we offer a range of other specialized lifting tools tailored to meet specific operational needs, ensuring maximum efficiency and safety for your lifting operations.

Controls: Control boxes are typically mounted on the crane or hoist and the pendant or remote console allows the operator to run the crane. The controls operate the drive and hoist motors, and can control Variable Frequency Drives (VFDs) to control hoist speed for precise load positioning.

Power Supply System: Insulated conductor bars, festoon systems (flat cables), or cable reels bring power to the crane.

Safety Devices: To ensure the seamless operation of the crane and to prevent potential personal injuries or mechanical failures, our safety apparatus go beyond basic electric protective devices or alarm bells.

This double girder overhead crane is suitable for industries such as metallurgy, building materials, chemical industry, and coal mining. It is used for loading and unloading bulk materials such as ores, slag, coke, coal, and sand in workshops, warehouses, or outdoor areas with fixed spans.

-Manufacturing Facilities: Ideal for lifting and moving heavy materials in manufacturing plants, assembly lines, and workshops.

-Warehousing and Logistics: Efficiently handles loading and unloading tasks in warehouses, distribution centers, and logistics facilities.

-Construction Sites: Provides reliable lifting support for construction materials and equipment on construction sites.

-Power Plants: Essential for maintenance and installation tasks in power generation facilities such as thermal power plants and hydroelectric dams.

-Shipbuilding and Ports: Used for lifting and transporting heavy components in shipyards and port terminals.

SEVENCRANE is a trustworthy professional crane manufacturer. The company focuses on the design and manufacture of cranes and has passed ISO 9001:2000, CE and SGS certifications. Since its establishment, the company has always been committed to bringing the design and product quality into line with international standards. So far, our cranes have been exported to Russia, Uzbekistan, the Philippines, Malaysia, Australia, Qatar, Tanzania, Singapore, Saudi Arabia, Venezuela, Brazil, Nigeria and other countries.

SEVENCRANE is also at your service with its best engineering and design energies. We provide a complete customized design service for your lifting and handling systems, ensuring tailor-made solutions for every need. We carefully analyse customer specifications, developing high-quality parts and components that optimize efficiency and safety.

It is a long way to go to build a well-known brand in the international crane industry, but we can do it!