Amazing stuff! I never get tired to learn more about the genius of Leonardo da Vinci!
He even considered earth quake damage in his bridge design:
"He also apparently understood that the region was prone to earthquakes, and incorporated features such as the spread footings that would provide extra stability. To test the structure’s resilience, Bast and Xie built the bridge on two movable platforms and then moved one away from the other to simulate the foundation movements that might result from weak soil."
The bridge is held together by compression and gravity only!
Engineers put Leonardo da Vinci’s bridge design to the test | MIT News: MIT engineers have analyzed a bridge design proposed by Leonardo da Vinci, and found that it would indeed have stood solidly, had it ever been built.
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