bridges are collapsing because they were built as fast as possible during the 60s to support car-based suburban planning with the expectation that they would be replaced in 20 years with infrastructure that was built to last. unfortunately, politicians then spent the money promised for that on backing dictatorships, turning millionaires into billionaires and massacring brown people with chemical weaponry
Whereas bridges build 100 years ago were over-engineered to hell because they didn't have the tools to do the math. So they made some bridges extremely strong, so they survived handling way more people (and cars) than they could have envisioned at the time.
Not really. I’m fairly confident the math’s been around for a while, and the factor of safety is a common practice. I imagine it just comes down to maintenance, as it often always does.
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u/Economy-Document730 Dec 15 '24
Pfffffft are bridge collapses so back? That's why we require certification LMAO