So the grout allows usto do that. As investigatorsscan the damage,they found no traces of...
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So the grout allows us
to do that. [narrator] As investigators
scan the damage,
they found no traces of grout, [narrator] As investigators
scan the damage,
they found no traces of grout, which suggested
that a key step had been missed for reasons
that remain unknown. And there was a second problem
with the bolts themselves. When they went back
after the building collapsed to check whether the bolts
were correct or not, they found that
they were too small, they found
there were some holes in some of the plates
that were found
to be too large, and that contributed
to misalignment that
wasn't supposed to be there
to do that. [narrator] As investigators
scan the damage,
they found no traces of grout, [narrator] As investigators
scan the damage,
they found no traces of grout, which suggested
that a key step had been missed for reasons
that remain unknown. And there was a second problem
with the bolts themselves. When they went back
after the building collapsed to check whether the bolts
were correct or not, they found that
they were too small, they found
there were some holes in some of the plates
that were found
to be too large, and that contributed
to misalignment that
wasn't supposed to be there
Full Transcript
00:00:01.000 --> 00:00:04.399
So the grout allows us
to do that.
00:00:07.000 --> 00:00:08.493
[narrator] As investigators
scan the damage,
they found no traces of grout,
00:00:08.493 --> 00:00:09.333
[narrator] As investigators
scan the damage,
they found no traces of grout,
00:00:11.008 --> 00:00:13.599
which suggested
that a key step
00:00:13.599 --> 00:00:18.002
had been missed for reasons
that remain unknown.
00:00:18.002 --> 00:00:22.001
And there was a second problem
with the bolts themselves.
00:00:22.001 --> 00:00:24.009
When they went back
after the building collapsed
00:00:24.009 --> 00:00:28.009
to check whether the bolts
were correct or not,
00:00:28.009 --> 00:00:31.001
they found that
they were too small,
00:00:31.001 --> 00:00:33.333
they found
there were some holes
00:00:33.333 --> 00:00:36.009
in some of the plates
that were found
to be too large,
00:00:36.009 --> 00:00:38.493
and that contributed
to misalignment that
wasn't supposed to be there.
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Movie Summary
With access to all phases of design and a large cast of experts, some of the great failures of engineering history are uncovered.
![[narrator] So why had
this historic dam failed
so catastrophically? - Engineering Catastrophes](https://clip.cafe/img400/narrator-so-why-had-this-historic-dam-failed-so-catastrophically.jpg)
![[narrator] The investigation
also revealed - Engineering Catastrophes](https://clip.cafe/img400/narrator-the-investigation-also-revealed.jpg)
![[narrator] When that happens
the soil above drops throug - Engineering Catastrophes](https://clip.cafe/img400/narrator-when-happens-the-soil-above-drops-throug.jpg)
![[narrator] On the surface,
the Westwood sinkhole - Engineering Catastrophes](https://clip.cafe/img400/narrator-on-the-surface-the-westwood-sinkhole.jpg)
![[narrator] As the
community mourned, - Engineering Catastrophes](https://clip.cafe/img400/narrator-as-the-community-mourned.jpg)
![[narrator] The first factor
officials would investigate
was the bear-trap gate - Engineering Catastrophes](https://clip.cafe/img400/narrator-the-first-factor-officials-would-investigate-was-the-bear-trap-gate.jpg)
