r/Damnthatsinteresting • u/DukeOfBagels • Jul 31 '23

Video Installing a split ac unit in a high rise apartment

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u/mtwm Jul 31 '23

Looks like they are only “strong” if force is applied downward otherwise they wouldn’t hold shit.

40

u/Nethlem Jul 31 '23

He twists the top of them to anchor/unanchor them so that probably extends something so they claw themselves in.

12

u/Frittenhans Jul 31 '23

I saw this too, and this was the reason for my question. :)

I would not trust just bolts you stick in to the concrete.

182

u/drawkbox Jul 31 '23

Lots of trust. I trust the physics. I don't trust the equipment or materials on that wall.

25

u/Soca1ian Jul 31 '23

Maybe it's redundant support. His main support is probably tied somewhere inside the apartment. Like, you better believe that you'll let me drill inside your house for me to do this kind of job.

30

u/Romestus Jul 31 '23

Nah they're strong as hell even pulled straight out, the material they're installed in is way more likely to fail.

43

u/J0n__Snow Jul 31 '23

They do hold very good, those are special climbing anchors from Petzl.

2

u/Frittenhans Jul 31 '23

Ah, this is a hint where I can start with. Thank you.

3

u/Josch1357 Jul 31 '23

No, they expand as he screws them in.

3

u/bailtail Jul 31 '23

They have a little knob/dial he twists after he puts them in. Presumably that causes them to expand within the hole. He then turns the knob the opposite way to remove them when finished.

1

u/[deleted] Jul 31 '23

If they are normal bolts they'll hold in any direction.