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Safety factor for selecting hydraulic cylinders in cranes

Flying Whale

Mechanical
Dec 20, 2024
16
I'm in the process of designing a mobile crane conforming to EN 13001 (Parts 1, 2 and 3).

The scope of this standard involves crane stability and structural integrity, but it seems to leave out the selection of cylinders and actuators or motors of any kind. I can't find any section that says for example a hydraulic cylinder should be able to provide n-times the max calculated force, where n is a safety factor. EN 13001-3-6 is concerned with the design of the cylinder itself and its internal components, not within the scope of a crane assembly.

I can't imagine the standard just not caring about driving forces, that'd leave room for way too many risks. Where else can I find this information? Choosing a non-standard arbitrary safety factor is not an option.

Thanks in advance.
 
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There are a lot of different ways to drive motion in a crane - so EN 13001 simplifies it down to the actual forces that result from those methods.
Since you're the designer of the crane SYSTEM, you know what driving units you're going to choose/use and therefore what forces they will apply to the structure.

This method of "discretizing" sections of a system into independent standards is not uncommon in the IEC world.

For a discussion on what EN13001 (-1, -2, and -3) are meant to accomplish, you could look at the advertising blurb at the following address:
https://sdcverifier.com/articles/en-13001-crane-verification-guide/
 

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