Comment on Broken stair step

• callcc@lemmy.world ⁨1⁩ ⁨month⁩ ago

  I’ll give that a try. Why do you mean that they are meant to break? They have lasted for 60 years now, that’s not too bad.

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  • wetbeardhairs@lemmy.dbzer0.com ⁨1⁩ ⁨month⁩ ago

    Those stairs have a bullnose that juts out and the whole thing is made from mortar. Mortar is very strong in compression but weak in tension. So a load on the tip of the stairs will put a large tension load on the top of that bullnose where it meets the stair corner. At some point it will break off.

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    • callcc@lemmy.world ⁨1⁩ ⁨month⁩ ago

      Makes sense.

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