![[narrator] But here, shoring poles were removed](https://clip.cafe/img800/narrator-but-here-shoring-poles-removed.jpg)
But here, shoring poles were removed before the lower floors were sufficiently cured,...
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[narrator] But here, shoring poles were removed before the lower floors were sufficiently cured, leaving the still hardening levels unable to support the weight of concrete being poured above. As the concrete
was being placed, the weight of the structure exceeded the capacity of the shoring, the columns, and the beams. [narrator] Within the rubble investigators found other problems. [William] The design flaws included columns that were half the size
that they needed to be, that were so densely packed with reinforcing steel, that the concrete couldn't even get down into them, and beams that were so densely packed with post tensioning cables that the concrete couldn't
even get in around the cables
was being placed, the weight of the structure exceeded the capacity of the shoring, the columns, and the beams. [narrator] Within the rubble investigators found other problems. [William] The design flaws included columns that were half the size
that they needed to be, that were so densely packed with reinforcing steel, that the concrete couldn't even get down into them, and beams that were so densely packed with post tensioning cables that the concrete couldn't
even get in around the cables
Full Transcript
00:00:01.000 --> 00:00:03.045
[narrator] But here,
shoring poles were removed
00:00:03.047 --> 00:00:06.999
before the lower floors
were sufficiently cured,
00:00:07.997 --> 00:00:10.045
leaving the still hardening
levels unable to support
00:00:10.001 --> 00:00:12.605
the weight of concrete
being poured above.
00:00:13.367 --> 00:00:15.565
As the concrete
was being placed,
00:00:15.567 --> 00:00:18.845
the weight of the structure
exceeded the capacity
of the shoring,
00:00:18.092 --> 00:00:20.925
the columns, and the beams.
00:00:23.487 --> 00:00:27.485
[narrator] Within the rubble
investigators found
other problems.
00:00:27.487 --> 00:00:30.765
[William] The design flaws
included columns
00:00:30.767 --> 00:00:34.125
that were half the size
that they needed to be,
00:00:34.167 --> 00:00:37.805
that were so densely packed
with reinforcing steel,
00:00:37.807 --> 00:00:40.485
that the concrete couldn't
even get down into them,
00:00:40.487 --> 00:00:45.685
and beams that were
so densely packed
with post tensioning cables
00:00:45.076 --> 00:00:48.965
that the concrete couldn't
even get in around the cables.
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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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