Comment on Broken stair step

• callcc@lemmy.world ⁨4⁩ ⁨weeks⁩ 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.

  source

  • wetbeardhairs@lemmy.dbzer0.com ⁨4⁩ ⁨weeks⁩ 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.

    source

    • callcc@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

      Makes sense.

      source