Under running bridge cranes, also known as underhung cranes, offer several advantages that make them a preferred choice in certain applications. Here are some key advantages of under running bridge cranes:
Maximum Use of Vertical Space: Under running cranes are suspended from the building structure, allowing for maximum utilization of the available vertical space. Since the bridge girder is supported from below by the runway beams, there is no need for additional space above the crane for the top running structure. This is particularly beneficial in facilities with limited headroom or low ceiling heights.
Increased Hook Height: The design of under running cranes allows for a greater hook height compared to top running cranes. As the bridge girder is suspended from below, it does not occupy any vertical space above the crane, resulting in increased lifting height and the ability to handle taller loads.
Smoother Movement: Under running cranes typically offer smoother movement compared to top running cranes. The wheels of the end trucks run along the bottom flange of the runway beams, providing a stable and controlled motion. This smooth movement is particularly important when handling delicate or sensitive loads.
Cost-Effective: The design of under running cranes often requires less steelwork and structural support compared to top running cranes. This can result in cost savings, especially when the building structure is already designed to support the crane loads. Additionally, under running cranes generally have lower deadweight, reducing the overall load on the building structure.
Flexibility in Layout Design: Under running cranes offer flexibility in the layout design of the facility. The crane runways can be arranged in various configurations, such as straight lines, curved paths, or customized layouts to accommodate the specific requirements of the workspace. This flexibility allows for efficient material flow and optimized use of the available floor space.
Easy Installation: Under running cranes are typically easier to install compared to top running cranes. Since they do not require additional space above the crane, the installation process is simplified. This can result in shorter installation times and minimized disruption to the facility’s operations.
It’s important to note that the suitability of an under running crane depends on the specific application and facility requirements. Factors such as load capacity, available space, ceiling height, and other operational considerations should be taken into account when determining the most suitable type of crane for a given application.
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