Second anchoring rod in Chinese/Democrat Designed Bay Bridge fails key test

[Leroy N. Soetoro]

http://www.reuters.com/article/2015/05/29/us-usa-bridge-california-
idUSKBN0OE01520150529

California transit officials have determined that a second high-strength
steel anchoring rod for the eastern span of the San Francisco-Oakland Bay
Bridge failed a key seismic "pull" test, and officials were due to meet on
Thursday to address the issue.

The revelation by California's transportation agency came after officials
said earlier this month that another steel rod, one of several hundred
anchoring the bridge's tower, was broken, although Caltrans said at the
time that the bridge should perform as designed in an earthquake.

A Bay Bridge oversight panel was expected to offer formal permission at a
meeting on Thursday to pull the two 25-foot-long rods for visual
inspection and possible transportation to a lab for analysis, said Leah
Robinson-Leach, spokeswoman for Caltrans, the state department of
transportation.

The panel “reserves the right to determine what will be done, how quickly
and the cost allowed,” Robinson-Leach said. “The time, quality and ability
to get the work done is a function of cost allowed.”

The eastern span of the bridge, which opened in 2013, is considered a
self-anchoring bridge notable for its single white tower, which the
National Basketball Association's Golden State Warriors have adopted for
their logo.

The span was built, at a cost of $6.4 billion, to replace a multitower
cantilever bridge built in 1936 that partially collapsed during the 6.9
magnitude Loma Prieta earthquake in 1989.

Caltrans said on Wednesday that an investigation begun in 2013 initially
focused on high-strength steel bolts that had broken after prolonged
exposure to water.

But that investigation later led to a probe into potential corrosion on
the 424 anchor rods designed to keep the bridge tower in place in the
event of a major Bay Area temblor.

“These anchor rods are one of the many seismic innovations on this bridge
that help ensure resiliency of the structure for decades to come,” said
Brian Maroney, chief engineer on the Bay Bridge project.

“The two rods that did not pass the test will be sent to a laboratory to
determine exactly what happened to them,” he added.


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