r/Damnthatsinteresting • u/rapatakaz • 1d ago

Video China is completing the construction of the tallest bridge in the world, which runs through the Grand Huajiang Canyon. The 2,890-meter-long steel suspension bridge rises 625 meters above sea level

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u/sarc-azam 1d ago

Why is it measured from sea level?

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u/AceAlex__ 1d ago

How else would you measure it? You need a reference point.

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u/chowindown 1d ago

From the span down to the ground or water directly below it? That way it makes some kind of sense as to how high the bridge is rather than just what altitude the terrain is. Those ladder bridges they use on Everest to get across crevasses would be much higher than this bridge, but might only bridge a 10m deep gap.