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Building a bridge that spans a wide road or river is extremely expensive without using iron or steel. If you do, that limits the lifespan because they corrode.
by lupusreal 2y ago
Building a bridge that spans a wide road or river is extremely expensive without using iron or steel. If you do, that limits the lifespan because they corrode.
We never forgot how to build stone bridges, we stopped doing it most of the time because nobody wants to pay for it.
- Retric 2y agoIron bridges can easily last 100+ years with maintenance, faster replacement is generally cheaper which is why you see exposed metal on so many highway bridges. Traffic on traditional stone bridge designs would quickly destroy them.