how were bridges designed before, say 1850, sometimes way before, able to handle the weight of a ww2 tank?
Were they overbuilt by orders of magnitude, miracle of the arch, or something else?
In: Engineering
Anybody can build a bridge that stands for 100 years and can handle a 3 tons of weight. It takes engineering to build a bridge that can *just* handle 3 tons of weight and will last for *exactly* 100 years. Prior to optimal engineering people just had to build stronger than necessary because they couldn’t otherwise know it was *as* strong as necessary.
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