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Buckling Calculation and Effective Length

Hi,

I have a 3 fixed-base SHS profile-columns (5m length) with the following K parameters (EN):

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Highlighted red above: KZ=2.1

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KY=2.3 for above red-highlighted columns

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KY=2.1 for above red-highlighted column

Here are their beam numbers:

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Now, I am confused as to why the buckling calculation (effective length) results in the STAAD Output Viewer resulted to below:

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Did I input the K values wrong?

Please advise.

Thank you.


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