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NARRATOR: But the expansion joint isn't just exposed
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Engineering Catastrophes

But the expansionjoint isn't just exposed to lateral movements --with this type of...

NARRATOR: But the expansion
joint isn't just exposed to lateral movements --
with this type of bridge, the suspension cables were
pulling upwards on the ends of the decks, and the investigation
discovered there was a problem with the bolts holding
everything in place

Full Transcript

00:00:01.000 --> 00:00:03.634
NARRATOR: But the expansion joint isn't just exposed
00:00:03.701 --> 00:00:06.634
to lateral movements -- with this type of bridge,
00:00:06.701 --> 00:00:09.801
the suspension cables were pulling upwards on the ends of
00:00:09.801 --> 00:00:11.000
the decks,
00:00:11.000 --> 00:00:13.934
and the investigation discovered there was a problem
00:00:14.001 --> 00:00:16.701
with the bolts holding everything in place.
Duration
18 seconds
Views
12
Timestamp in Movie
00:20:40
Uploaded
Oct 28, 2025
Season
6
Episode
7
Genres
documentary
Production
Moviecoop

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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.
S06 • E09 Without it, the tower of columns would become unstable, - Engineering Catastrophes 00:07
Without it, the tower of columns would become unstable,
S06 • E01 [narrator] On the surface, the Westwood sinkhole - Engineering Catastrophes 00:23
[narrator] On the surface, the Westwood sinkhole
S06 • E09 CUETO: And as the levels kept going up, - Engineering Catastrophes 00:06
CUETO: And as the levels kept going up,
S06 • E02 They didn't stand a chance. - Engineering Catastrophes 00:12
They didn't stand a chance.
S06 • E09 Without grout, the stresses on that shim plate - Engineering Catastrophes 00:06
Without grout, the stresses on that shim plate
S06 • E09 The entire column shifts down from its intended position. - Engineering Catastrophes 00:06
The entire column shifts down from its intended position.
S06 • E07 {\an8}On one connection, all 40 bolts that kept - Engineering Catastrophes 00:07
{\an8}On one connection, all 40 bolts that kept
S06 • E02 [narrator] As the community mourned, - Engineering Catastrophes 00:24
[narrator] As the community mourned,
S06 • E08 [narrator] The first factor officials would investigate was the bear-trap gate - Engineering Catastrophes 00:21
[narrator] The first factor officials would investigate was ...
S06 • E09 Once that column shifted from its intended position, - Engineering Catastrophes 00:07
Once that column shifted from its intended position,
S06 • E07 {\an8}What they didn't know was why. - Engineering Catastrophes 00:06
{\an8}What they didn't know was why.
S06 • E09 This essentially causes the entire - Engineering Catastrophes 00:08
This essentially causes the entire
S06 • E07 MABRY: The failed bolts were sent for - Engineering Catastrophes 00:13
MABRY: The failed bolts were sent for
S06 • E01 When we're pulling water from the aquifer near - Engineering Catastrophes 00:12
When we're pulling water from the aquifer near
S06 • E05 [narrator] So why had this tried and true method used around the world - Engineering Catastrophes 00:10
[narrator] So why had this tried and true method used around...
S06 • E10 It was a big disaster. - Engineering Catastrophes 00:21
It was a big disaster.
S06 • E06 In other words, the columns weren't stacked up exactly right. - Engineering Catastrophes 00:06
In other words, the columns weren't stacked up exactly ...
S06 • E06 They weren't exactly aligned. - Engineering Catastrophes 00:42
They weren't exactly aligned.
S06 • E09 The unstable column failed in seconds, - Engineering Catastrophes 00:12
The unstable column failed in seconds,
S06 • E05 {\an8}The temporary structure is under constant pressure from the huge loads on top. - Engineering Catastrophes 00:07
{\an8}The temporary structure is under constant pressure fro...