OSHA: definitely bent in the straight places

The Something Awful Forums > Main > General Bullshit > OSHA: definitely bent in the straight places

MutantBlue: Jun 8, 2001

https://www.youtube.com/watch?v=Zz95_VvTxZM
https://www.youtube.com/watch?v=0N17tEW_WEU
https://www.youtube.com/watch?v=UpWeU2fvFGs

# ? Jun 21, 2017 13:23

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# ? May 21, 2024 07:06

quite stretched out: Feb 17, 2011; the chillest

Bloody Hedgehog posted:

The container is airtight. Hot steam inside the container, at atmospheric pressure. Then the cold rain falls on the container, cooling the container and turning the steam back into water, condensing it and pulling a vacuum inside the container. The container is obviously pretty drat strong, but eventually it gives and the vacuum pulls the container in on itself.

i assume also, the second the container starts to buckle its structural integrity disappears completely ala a submarine springing a small leak

# ? Jun 21, 2017 13:24

Collateral Damage: Jun 13, 2009

It's also worth noting that railway tankers have both positive and negative pressure safety valves specifically to prevent implosions/explosions. Given how it's filmed those are probably done with the safety valves blocked on purpose to showcase the forces involved.

# ? Jun 21, 2017 13:30

GotLag: Jul 17, 2005; 食べちゃダメだよ

Operating under real-world conditions then? :v:

http://blogs.sciencemag.org/pipeline/archives/2006/03/08/how_not_to_do_it_liquid_nitrogen_tanks

quote:

Both the pressure relief and rupture disks had failed for some reason in the past, so they�d been removed and sealed off with metal plugs.

# ? Jun 21, 2017 14:02

Malachi Constant: Feb 2, 2006; I was a victim of a series of accidents, as are we all

Bloody Hedgehog posted:

The container is airtight. Hot steam inside the container, at atmospheric pressure. Then the cold rain falls on the container, cooling the container and turning the steam back into water, condensing it and pulling a vacuum inside the container. The container is obviously pretty drat strong, but eventually it gives and the vacuum pulls the container in on itself.

As a physics teacher I can not let this slide by. The vacuum doesn't "pull it in", it's the ambient air pressure that pushes it in.

Also, straws don't work by pulling up the liquid, they work because you reduce the pressure in your mouth, allowing the atmospheric pressure that is pressing on the surface of the liquid to force it up the straw.

# ? Jun 21, 2017 16:25

Gynocentric Regime: Jun 9, 2010; by Cyrano4747

The Sausages posted:

The inverse is also true, 1700 litres of steam will condense into 1 litre of water. Like so:

Here's 20L of water into a volcano

https://www.youtube.com/watch?v=lDxOhfiFsuc

# ? Jun 21, 2017 16:26

sandoz: Jan 29, 2009

Elendil004 posted:

Speaking of ships hitting things. Last night:

As you can see the ferry failed to make the right turn (that it had been making all day), and hit the jetty at full speed. Status: Stopped.

I do like the Coast Guard helo's throwback livery.

I have a lot of thoughts on this one, having run a similar boat on a similar path many years ago, but I'll wait to see what comes up.

Surprisingly the damage is not as bad you would think

# ? Jun 21, 2017 16:59

wolrah: May 8, 2006; what?

https://i.imgur.com/ne22N7y.mp4

# ? Jun 21, 2017 16:59

Nocheez: Sep 5, 2000; Can you spare a little cheddar?; Nap Ghost

wolrah posted:

https://i.imgur.com/ne22N7y.mp4

I gasped watching that. Holy poo poo that guy was loving lucky.

# ? Jun 21, 2017 17:16

Megillah Gorilla: Sep 22, 2003; If only all of life's problems could be solved by smoking a professor of ancient evil texts.; Bread Liar

^^^ Me too.

gently caress.

Not what I was expecting.

# ? Jun 21, 2017 17:19

Modest Mao: Feb 11, 2011; by Cyrano4747

Attempted Murder

# ? Jun 21, 2017 18:33

Gunshow Poophole: Sep 14, 2008; OMBUDSMAN
POSTERS LOCAL 42069; Clapping Larry

there can't possibly be an actuated release for the bucket attach point, right?

RIGHT??

# ? Jun 21, 2017 18:51

haveblue: Aug 15, 2005; Toilet Rascal

Ol Standard Retard posted:

there can't possibly be an actuated release for the bucket attach point, right?

RIGHT??

In my uninformed opinion it looks like holding it in that position for too long caused something to snap that was weaker than it was supposed to be.

# ? Jun 21, 2017 18:54

jamal: Apr 15, 2003; I'll set the building on fire

Maybe they were in the process of removing the bucket (I think you have to pull out two big pins), and it stuck in place. Doesn't explain why it got lifted up so high and the guy walked under it though.

# ? Jun 21, 2017 19:18

Heffer: May 1, 2003

Don't some bull dozers have the ability to swap out the attachment like your average home vacuum cleaner?

# ? Jun 21, 2017 19:23

suuma: Apr 2, 2009

Yeah, it's held on by a pin.

Presumably the pin fell out/someone took it out, that might even be what the ground guy was going after.

# ? Jun 21, 2017 19:27

Proteus Jones: Feb 28, 2013

Heffer posted:

Don't some bull dozers have the ability to swap out the attachment like your average home vacuum cleaner?

They use huge solid steel pins that go in the brackets on the bucket. But the bucket needs to be resting on the ground. The weight of the bucket would make it almost impossible to remove the pins while suspended (if installed correctly).

Most likely explanation is a lovely weld-job, incorrect pins for the bucket size, or metal fatigue with the brackets.

# ? Jun 21, 2017 19:29

Wasabi the J: Jan 23, 2008; MOM WAS RIGHT

Three-Phase posted:

Yeah I was gonna come back and add a note to my post there.

But people have done some really batshit stuff that wasn't a joke.

Like the time my employer thought this was a great plan.

They instructed me to gently caress with that mess if there was a power outage, and I said, "Sure, sure..." and immediately documented why I wasn't going to touch poo poo.

# ? Jun 21, 2017 19:35

zedprime: Jun 9, 2007; yospos

Malachi Constant posted:

As a physics teacher I can not let this slide by. The vacuum doesn't "pull it in", it's the ambient air pressure that pushes it in.

Also, straws don't work by pulling up the liquid, they work because you reduce the pressure in your mouth, allowing the atmospheric pressure that is pressing on the surface of the liquid to force it up the straw.

But like net forces are relative, man. It's all in your head whether it's air pressure pushing in or vacuum pulling in.

# ? Jun 21, 2017 19:39

The Bloop: Jul 5, 2004; by Fluffdaddy

zedprime posted:

But like net forces are relative, man. It's all in your head whether it's air pressure pushing in or vacuum pulling in.

No because vacuum can't "pull"

Do you suppose that lack of something attaches itself to the inside of the vessel and then contracts somehow?

There was a great poster on the wall in one of my chem labs back in the day SCIENCE DOESN'T SUCK

edit: Trek :goonsay:

example:

Riker: Sucked into Space

# ? Jun 21, 2017 20:00

John Wick of Dogs: Mar 4, 2017; A real hellraiser

That's why they call it a blowjob, your dick isn't being sucked, the pressure in your partner's mouth has just been reduced creating a vacuum.

# ? Jun 21, 2017 20:07

evil_bunnY: Apr 2, 2003

Heffer posted:

Don't some bull dozers have the ability to swap out the attachment like your average home vacuum cleaner?

All the excavators I've seen in Scandinavia can hotswap buckets.

# ? Jun 21, 2017 20:10

Phanatic: Mar 13, 2007; Please don't forget that I am an extremely racist idiot who also has terrible opinions about the Culture series.

# ? Jun 21, 2017 20:11

Gumbel2Gumbel: Apr 28, 2010

Wasabi the J posted:

Like the time my employer thought this was a great plan.

They instructed me to gently caress with that mess if there was a power outage, and I said, "Sure, sure..." and immediately documented why I wasn't going to touch poo poo.

I couldn't come up with something that looked unsafer than that if I tried.

# ? Jun 21, 2017 20:13

Volcott: Mar 30, 2010; People paying American dollars to let other people know they didn't agree with someone's position on something is the lifeblood of these forums.

Gumbel2Gumbel posted:

I couldn't come up with something that looked unsafer than that if I tried.

https://www.youtube.com/watch?v=pQ2dI_B_Ycg

# ? Jun 21, 2017 20:18

Bloody Hedgehog: Dec 12, 2003; 💥💥🤯💥💥
Gotta nuke something

Malachi Constant posted:

As a physics teacher I can not let this slide by. The vacuum doesn't "pull it in", it's the ambient air pressure that pushes it in.

Also, straws don't work by pulling up the liquid, they work because you reduce the pressure in your mouth, allowing the atmospheric pressure that is pressing on the surface of the liquid to force it up the straw.

Oh no, your nerd poo poo is pulling in my fist towards your face, poindexter.

You better hope I don't find out how doxxing works and then I show up at whatever D&D/Pokeman shop you hang out at, NERD.

# ? Jun 21, 2017 20:23

Over There: Jun 28, 2013; by Azathoth

Volcott posted:

https://www.youtube.com/watch?v=pQ2dI_B_Ycg

How does he turn it off

# ? Jun 21, 2017 20:23

Literally A Person: Jan 1, 1970; Smugworth Wuz Here

Wasabi the J posted:

Like the time my employer thought this was a great plan.

They instructed me to gently caress with that mess if there was a power outage, and I said, "Sure, sure..." and immediately documented why I wasn't going to touch poo poo.

What'd the clipboard say?

# ? Jun 21, 2017 20:38

By popular demand: Jul 17, 2007; IT *BZZT* WASP ME--
IT WASP ME ALL *BZZT* ALONG!

Over There posted:

How does he turn it off

Hit it with a baseball bat?

# ? Jun 21, 2017 20:49

CJacobs: Apr 17, 2011; Reach for the moon!

Over There posted:

How does he turn it off

Move to a new house and forget his memories of its existence.

edit: Or a shotgun

# ? Jun 21, 2017 20:57

chitoryu12: Apr 24, 2014

Over There posted:

How does he turn it off

https://www.youtube.com/watch?v=q-v80a15ScM

# ? Jun 21, 2017 21:02

chitoryu12: Apr 24, 2014

Okay but he has seriously developed a tool to turn it off.

https://www.youtube.com/watch?v=ewKX7NmnDfI

# ? Jun 21, 2017 21:04

Wasabi the J: Jan 23, 2008; MOM WAS RIGHT

Literally A Person posted:

What'd the clipboard say?

A series of instructions to potentially backfeed generator power to the city. Seriously, you were supposed to turn on a generator and pop a mains breaker and then something else.

I didn't bother to learn what to do. I wasn't going to gently caress with something that loving stupid.

# ? Jun 21, 2017 22:00

Three-Phase: Aug 5, 2006; by zen death robot

Hubis posted:

My physics is a little rusty, but wouldn't Lorenz forces just push that contact apart? Or would that require a lot more amperage?

Well yeah you've got the right-hand rule for current flowing through a conductor...

As far as current goes certain inrush loads (motor, capacitor, transformer) could cause forces on cables, but in a serious a prolonged short circuit ("bolted" fault) you can get magnetic forces strong enough to whip cables or even damage or warp copper busbars. In a fault I could easily imagine forces strong enough to knock that apart.

We got a 480V motor control center that was I believe 1200 amps nominal but the busses inside were rated to withstand the magnetic forces in a short-circuit fault of up to 65,000 amps. I've seen fuses that are rated to like 120,000 amps.

Seemingly small and insignificant numbers like how many milliohms per feet of cable, or the length of a cable, or whether that cable is in a plastic conduit, metal conduit, or cable tray can make a huge difference in a fault.

Three-Phase fucked around with this message at 22:17 on Jun 21, 2017

# ? Jun 21, 2017 22:12