Building codes of course are written by blood and shall be followed. But looking on that photo... You see bunch of vertically standing "levers" around. With th

Building codes of course are written by blood and shall be followed. But looking on that photo... You see bunch of vertically standing "levers" around. With their own resonance frequencies. Dynamic of their vibrations is quite complex. They may amplify effect in some places. Effect of standing wave and the like. But that's also about building codes I believe.