And they connected to the bottom are their main supports for the bottom of the clip ons....
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And they connected to the bottom are their main supports for the bottom of the clip ons. And you can see the two working side by side at this point. [narrator] The audacious expansion was a success at first, but by the 1980s, traffic had soared yet again And the clip ons were starti to feel the strain. The connection between the road deck and clip ons was failing. There was recognition
of the fact that we were starting
to get metal fatigue and cracking taking place in some of the new clip on members. [narrator] In 1985, a detailed inspection reveal cracks in the reinforcing ri just beneath the surface of the road. These aren't giant cracks
for all to see, they're hidden on the welds
deep inside the clip ons
of the fact that we were starting
to get metal fatigue and cracking taking place in some of the new clip on members. [narrator] In 1985, a detailed inspection reveal cracks in the reinforcing ri just beneath the surface of the road. These aren't giant cracks
for all to see, they're hidden on the welds
deep inside the clip ons
Full Transcript
00:00:01.000 --> 00:00:02.758
And they connected
to the bottom
00:00:02.076 --> 00:00:05.118
are their main supports
for the bottom of
the clip ons.
00:00:05.012 --> 00:00:08.438
And you can see
the two working side
by side at this point.
00:00:09.092 --> 00:00:14.438
[narrator] The audacious
expansion was
a success at first,
00:00:14.044 --> 00:00:18.198
but by the 1980s,
traffic had soared yet again
00:00:18.273 --> 00:00:21.438
And the clip ons were starti
to feel the strain.
00:00:23.084 --> 00:00:28.518
The connection between
the road deck
and clip ons was failing.
00:00:28.052 --> 00:00:30.678
There was recognition
of the fact
00:00:30.068 --> 00:00:32.478
that we were starting
to get metal fatigue
00:00:32.052 --> 00:00:34.398
and cracking taking place
00:00:34.044 --> 00:00:36.598
in some of the new
clip on members.
00:00:37.072 --> 00:00:41.398
[narrator] In 1985,
a detailed inspection reveal
00:00:41.004 --> 00:00:44.558
cracks in the reinforcing ri
just beneath
00:00:44.056 --> 00:00:46.958
the surface of the road.
00:00:46.096 --> 00:00:49.118
These aren't giant cracks
for all to see,
00:00:49.012 --> 00:00:52.998
they're hidden on the welds
deep inside the clip ons.
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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.
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