What is the difference between a double girder crane and an overhead crane?

 The main difference between a double girder crane and an overhead crane is in their design and construction:


1. Girder configuration:

   - Double girder crane: Has two parallel overhead girders that span the length of the crane. This provides more load capacity and stability compared to a single girder.

   - Overhead crane: Can have a single girder or double girders. The defining feature is that the crane bridge travels on overhead rails or runways.


2. Load capacity:

   - Double girder crane: Generally has a higher load capacity than a single girder overhead crane, due to the increased structural strength from the two parallel girders.

   - Overhead crane: Load capacity varies based on the number of girders and the crane's overall design.


3. Application:

   - Double girder crane: Commonly used for heavier loads and in industrial applications like manufacturing, warehousing, and construction.

   - Overhead crane: Can be used for a wide range of loads and applications, from light-duty to heavy-duty, in various industrial settings.


4. Clearance:

   - Double girder crane: The dual girders provide more vertical clearance underneath the crane compared to a single girder overhead crane.

   - Overhead crane: The overall height of the crane system, including the girders and runway, determines the available vertical clearance.


In summary, the key difference is the use of two parallel girders in a double girder crane, which provides increased load capacity and stability compared to a single girder overhead crane design.



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