this post was submitted on 03 Jul 2023
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This is done by turning the tires inside-out and pushing them through horizontally. You need a machine to do it though because that rubber is very stiff.
How does turning then inside out solve the problem of getting them on the post? I can't picture it in my head
Because the tire is topographically a radially flattened torus, when you turn it half inside out, it becomes a 2D mΓΆbius strip. At this point it effectively has only one side. When you push such construct horizontally against a solid, because the z-axis perpendicular to the strip has no negative values (it only has one side), if that coincides with the orientation of the βNp of the solid, the z vector wraps around the solid. When the tire snaps to its rest state (inside in), it's easy to see why it ends up around the pillar.
This 3D animation demonstrates the concept:
https://youtu.be/xvFZjo5PgG0
:(
Honestly I'd just assume they cut them and use a torch to melt them back together. You'd probably never notice after a long enough time because of weathering and dust. Maybe even put there before it was capped off with the second floor?
Vulcanized rubber tends to burn more easily than it melts. You could melt them back togeather but you need finer temp control than a normal torch offers. Odds are they were just glued back togeather. It's not like they're being used on the road so you don't need to worry about the glue holding up under those conditions. I'm also pretty sure I can see the line in the video where they were cut and glued.
Yeah that was another thought I had, I've seen them glue treads on surely glue would be just fine for this makeshift bumper system.
Pushing them through what exactly?
why are people downvoting this amazing answer, lol
Yes this is how they do it. In some situations you can get away doing it diagonally but typically only works with type B tires.
Source: parking garage grip 30 years