requirements:

  • quick to erect
  • cheap materials
  • hard to move
  • Voyajer@lemmy.world
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    2 days ago

    4.5" PVC pipe, premixed concrete bag, yellow spray paint.

    The hardest part will be breaking through the asphalt and down a couple feet for anchoring.

  • bruhbeans@lemmy.ml
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    2 days ago

    Get a cheap plastic form- a large plastic plant pot would work well. Line with tinfoil or plastic wrap. Cut a large hole in the bottom of the pot and the tinfoil. Turn it upside down in the spot you want the bollard. Fill with quick-set concrete. When the concrete is set, take the pot with you so you can make more, the foil should keep it from sticking. If you can work out a way to get some metal wire into the concrete form before you pour, it’ll be much stronger.

    Downsides to this could be getting enough concrete and water to the site- shit is heavy. Also, while it should be set in an hour or two, getting knocked by a car right away might kill it.

    • BothsidesistFraud@lemmy.worldOP
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      2 days ago

      I looked it up and an 80 pound bag of concrete needs about 3L of water. That all seems doable.

      Anyone know how long it would take to set?

      • bruhbeans@lemmy.ml
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        2 days ago

        I would expect it to be set enough that you could remove the form after a half hour to an hour

  • NegativeLookBehind@lemmy.world
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    2 days ago

    Find the biggest plastic tub at a home improvement store

    8-10 bags of concrete

    Place container, fill with concrete, water appropriately.

    Preferably do this in the early evening so it has time to cure over night

    • BothsidesistFraud@lemmy.worldOP
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      2 days ago

      Believe me I have thought about figuring out a way to make a tire shredder that won’t trigger for even the heaviest e-bike, but would for cars. Don’t think it’s worth the risk. Primary goal is not to hurt anyone.