Episode
1648: "Why Are Manhole Covers Round?"
- Podcast
- Interesting Things with JC
- Published
- May 10, 2026
- Duration seconds
- 147
- Processing state
not_requested- Canonical source
- https://jimconnors.net/interesting-things-with-jc/2026/5/10/1648-why-manhole-covers-are-round
Actions
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Summary
Interesting Things with JC #1648: "Why Are Manhole Covers Round?" – A heavy cover sits over a city access hole, but its shape keeps it from dropping into the tunnel below; the same circle also spreads traffic force and lets workers roll 90-to-250-pound cast iron through the street. This episode is inspired by Mr. Paul.