Difference Single Girder vs Double Girder Overhead Cranes

In industrial lifting equipment, single girder and double girder overhead cranes are two common design types, which play an important role in different application scenarios. Single girder overhead cranes have a simple structure and lower cost, and are suitable for light and medium loads; while double girder overhead cranes have higher load carrying capacity, faster operating speeds, and more complex designs, and are commonly used in heavy-duty and high-intensity work environments. In this article, we will discuss the structural differences between single girder vs double girder overhead cranes, their performance characteristics and applicable scenarios, to help you better understand how to choose the right type of crane according to actual needs.

Structural differences and lifting capacity

Single girder overhead cranes are usually composed of a main girder and end girders at both ends, which makes the structure relatively simple and easier to install and maintain. Single girder cranes have high flexibility in occasions where space is limited. However, the carrying capacity of single girder structure is relatively limited, suitable for light and medium load occasions. Its maximum load is generally 32 tons, beyond which the double girder crane becomes a more suitable choice.

In contrast, the double girder overhead crane, which consists of two parallel main girders and end girders at both ends, has a more complex and robust structure. This design improves the overall rigidity, stability and safety of the crane and allows it to withstand greater loads. With a maximum load capacity of 300 tons, double girder cranes are suitable for heavy material handling and large equipment installation.

Running Speed

Double girder cranes have a significant advantage in terms of operating speed. They use a smaller reduction gear ratio, which allows the crane to run faster and complete lifting tasks more efficiently. Single girder cranes, on the other hand, usually use a larger speed ratio in order to maintain stability, and run at a relatively slower speed, which is suitable for occasions that do not require high speed.

Grado di lavoro

Double girder overhead birdge cranes are usually of a higher working class and are suitable for high-intensity, high-frequency working environments. They are designed to withstand greater workloads and longer running times, and therefore perform better in situations that require continuous operation. Single girder overhead birdge cranes, on the other hand, are suitable for less intense and less frequent operations.

Price

The double girder crane has a higher manufacturing cost, mainly due to the need to adopt a larger steel structure and the use of more steel. In addition, double girder cranes require separate production of the trolley running part, as well as the hoisting mechanism and the walking platform, and these factors lead to a higher price. In contrast, single girder cranes have a simple structure and lower material costs, making them an affordable choice when budgets are limited.

Types	Capacità di sollevamento	Campata	Grado di lavoro	Price Range
Single Girder	1-32 ton	7.5-31.5m	A1-A7	$7,500 - $25,000
Double Girder	5-500 ton	10-40m	A1-A8	$18,000 - $95,000

Conclusione

Single girder and double girder overhead cranes have their own unique advantages and applicable scenarios. Single girder cranes are simple in structure, cost-effective and suitable for light and medium loads, while double girder cranes have a larger load capacity, faster operating speeds and higher working levels, making them ideal for heavy-duty industrial applications. When choosing a crane, the most appropriate decision should be made based on specific application requirements, budgetary constraints and working environment.

If you still have questions about the selection of single girder or double girder overhead cranes, or need a customized solution, please contact our professional team, we will provide you with the best service and technical support!