At Kinzua Bridge. It stood up almost 100 Years until an F1 tornado downed it, that’s crazy.Submitted by [deleted] t3_ym77vs in Pennsylvania
Bucks_Deleware t1_iv48502 wrote
Reply to comment by hvacthrowaway223 in At Kinzua Bridge. It stood up almost 100 Years until an F1 tornado downed it, that’s crazy. by [deleted]
It's pretty old yeah. Most overpasses are designed with an assumption of 50-75 hears of life. A suspension bridge like the Verrazano Narrows, Ben Franklin, or Golden Gate are designed to last forever (hence why they are so large and relatively overbuilt).
100 years is typical for a bridge, but one of this size may be actually be on the lower end.
The reason this bridge fell was because of an engineering choice regarding modifications to the anchor bolts at the base of the towers. Pretty interesting to look in to.
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