Robert Roland on Sat, 02 Nov 2019 20:08:58 +0100
typed in rec.crafts.metalworking the following:
On Fri, 1 Nov 2019 00:30:16 -0400, "Carl"
wrote:

I'm also curious how the 55 gal drums failed - did
the ends or the side give way and implode?

I'm sure it will vary, but here are some school kids trying it out:

https://www.youtube.com/watch?v=JsoE4F2Pb20

The Mythbuster guys managed to collapse a tank car. But they had
to "ding" the tank to compromise the structural integrity first. (The
first time they tried, they got a vacuum of 27 inches Hg, but no
collapse. Third time, they dropped a 3,200 lb concrete block on it,
and the tank collapse at 23 inches Hg.)

--
pyotr filipivich
"With Age comes Wisdom. Although far too often, Age travels alone."