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Historically, engineers supported domes with iron chains, but there's an easier way to build a dome this tall today.
When the dome above St. Peter's Basilica in Rome began to crack under its own tremendous weight, Vatican engineers panicked. They tied iron chains around the base of the dome to prevent it from thrusting outward and collapsing. Luckily, the emergency fix stood the test of time.
It will take a lot of iron chains and money to keep your heavy concrete dome from collapsing. Besides, there's an easier -- and less risky -- way to build a dome this tall today. Try again!
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