The Smell of Molten Projects in the Morning

Ed Nisley's Blog: Shop notes, electronics, firmware, machinery, 3D printing, laser cuttery, and curiosities. Contents: 100% human thinking, 0% AI slop.

The New Hotness

  • Tree vs. Guide Rail: Sheared Bolt

    Spotted on a walk along the Mighty Wappingers Creek after a storm with plenty of gusty winds:

    Tree-smashed guide rail
    Tree-smashed guide rail

    The tangle of branches and logs came from a tree that fell across the road from the far right side and put that crease into the guide rail. The vertical stump seems unrelated to that incident.

    A bit of rummaging at the base of one post produced a victim:

    Tree-smashed guide rail - sheared bolt - side
    Tree-smashed guide rail – sheared bolt – side

    The impact produced enough force to turn the rail brackets into guillotine metal shears against the posts:

    Tree-smashed guide rail - sheared bolt - end
    Tree-smashed guide rail – sheared bolt – end

    It’s not a clean shear cut, which isn’t surprising under the circumstances.

    An ordinary ½-13 Grade 8 bolt has a 17 k pound proof load: popping that bolt required a mighty oomf.

    Memo to Self: stay indoors during windy storms!