Is this the Fourier Number, or some other formula?

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SUMMARY

The discussion revolves around a formula observed on a building in Korea, specifically referencing the Fourier number (F0). Participants speculate that the formula may relate to the fundamental frequency of a vibrating string or rod, potentially linked to the structural integrity of the brick wall. The mention of earthquakes suggests a possible connection to architectural safety measures, indicating that the formula could be an inside joke among the architects and engineers involved in the project.

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nomadreid
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This is on a building in Korea, and the F0 made me think of the Fourier number, but the rest of the formula is unfamiliar to me. Does anyone recognize it?
 

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It looks like the fundamental frequency of a vibrating string or rod.
 
It might be the fundamental frequency of the brick wall, a private joke between the architects and engineers, since earthquakes are possible and the "writing is on the wall".
 
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