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engineers search for cause in cracked beam at transit hub

by:Xingfa      2019-11-09
San Francisco officials on Wednesday struggled to find the reason for the unusual cracking of the support beam, which closed a new
The $2 billion transportation center opened to become a rich, hightech city.
As a reflection of San Francisco\'s reputation for innovation and sustainability, the sales force Transportation Center opened with great fanfare last month.
Its rooftop park will provide a social green space for people, while commuters can take buses from multi-storey buildings spanning three city blocks.
Now, the transportation hub, named after the cloud computing giant, seems to be the latest example of an urban problem filled with homelessness and poor infrastructure.
Officials say the closure will continue until the facility is declared safe, creating confusion during the rush hour on Tuesday night.
Wrapped in a white metal veil, five
There is a horizontal center of towering sky
The brightly lit central entrance hall is located in the south near the market, where buildings are booming.
It is adjacent to so-
Known as the sunken apartment, the Millennium Tower, has been solved by about 18 inch (45 centimetres)
Since its opening in 2009 in a former landfill.
Officials and construction experts say the two cracked beams at the transportation center have nothing to do with the apartment\'s plight, although some homeowners have sued developers and the city, claiming that the construction of transport facilities has caused the Millennium Tower to sink.
On Tuesday morning, workers who installed roof tiles found the first crack on a steel beam supporting the transportation center roof Park, about 2 2 feet long and about 4 inch deep.
Later in the day, a second smaller crack was found on the parallel beam.
Mark Zabaneh, executive director of the Transbay Joint Authority, which operates the transit hub, said the other two similar Beams did not show signs of cracking.
He said that their top priority was to reinforce the beams in order to reopen the facilities while the engineers sought permanent repair.
He said he expects the center to remain closed at least until the end of next week.
\"We are working to correct this situation,\" Zabaneh said . \".
\"We are very disappointed in what happened;
We will make it clear.
He said steel came from Stockton-
Based in Herrick
It looks good when the beam is installed in January 2016.
Zabeneh said that the problem may be in the manufacture, installation or design of the beam.
Construction experts say steel beams supporting the cracking of buildings are rare.
Engineer David Friedman says there may be no cracks in the beam, but once the weight of the roof garden and other structures increases, \"The new stress may exacerbate possible manufacturing defects.
Engineer Joe Maffei said: \"The beam may have passed the inspection after installation.
\"If this is the case, it is likely that the welding caused the problem,\" he said . \".
London Mayor Breed said in a statement that the role of the building in the wider transportation system is too important, \"cannot act quickly to provide a clear answer to the public, once the reason is determined, someone is responsible.
\"The bus has been diverted to a temporary transportation center about two blocks away, which is used during construction.
A downtown street under the beam was also ordered to close indefinitely, causing a commuter nightmare.
Juliana Cheng, who lives nearby, burst into laughter when asked about cracking.
\"I think it\'s disappointing, but it\'s also a bit interesting because they built this very big building and they spent a lot of money,\" said Cheng, 32 . \".
\"I think the money should be used for a lot of other things. ”“I don’t know.
Maybe it\'s a signal, \"she said.
Earlier this year, the San Francisco Transport Agency revealed that a contractor had installed about three miles (5 kilometres)
The new $1 rail rating is wrong.
6 billion Metro Branch
Several faulty trains and buses destroyed the city hall\'s traffic week celebrations on Monday.
The transit terminal created the \"Great Western central area\" and opened up after nearly a decade of construction.
It is expected to accommodate up to 100,000 passengers per working day and up to 45 million passengers per year.
In the booming South near the market, many towering apartment buildings have been pulled up and several multi-storey construction projects are underway.
On 2012, officials voted to dismantle the building.
As San Francisco tries to attract tech companies in Silicon Valley, it is highly restricted to encourage growth near the transportation hub.
Open its adjacent 61-
Earlier this year, story sales force Tower purchased the naming rights of the transportation center in 2017 as 25-
The sponsorship agreement was $0. 11 billion.
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