"They all have fiberglass shells, which are less prone to cracking than concrete... | Hacker News

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devmonk on Oct 19, 2010 | parent | context | favorite | on: Design: Take Shelter in a Human Habitrail

"They all have fiberglass shells, which are less prone to cracking than concrete and, lacking steel, won’t show up on target-acquisition systems."

How well does it withstand impact compared to concrete or steel?

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