Skip to comments.Bay Bridge shock absorbers spring leak (Retrofit parts gone bad.. what else is new?)
Posted on 07/20/2013 9:04:04 AM PDT by NormsRevenge
While broken bolts on the new eastern span of the Bay Bridge are commanding everyone's attention, Caltrans has another problem on its hands - 96 seismic shock absorbers on the western span, some of which began leaking lubricant just three years after they were installed.
The estimated cost of the fix - $13 million.
And, like the brittle bolts on the eastern span, there are questions as to whether Caltrans ordered the right shocks - or dampers, as they are known - in the first place.
The dampers are located between the bridge towers just below the roadway, and are intended to dissipate energy from an earthquake and reduce stress on the structure.
Caltrans installed them in 2004 as part of a $670 million seismic upgrade of the western span and its approaches. Transportation officials expected them to last 20 years.
But by 2007, Caltrans officials say, a dozen of them began leaking.
The number has since grown to 37.
(Excerpt) Read more at sfgate.com ...
Too big to fail?
Weren’t the steel parts made in China?
Surprise! They don’t need no stinking bomb to cripple us...
They should have gone to Midas.
Ya, I thought this bridge rebuilding project was done in China. How the heck that was okay with the liberals and labor leaders is beyond me. Democrats run California now, so they can’t blame any of this on the GOP or George W. Bush.
Rubber and oil......
“Surprise! They dont need no stinking bomb to cripple us...”
That bridge is in San Fransicko, California.
That place has crippled itself long ago.
Look for the union label...
Parts probably made in China.
Cripples are crippling us.
Every one has an excuse for why they should get treated differently than others.
Those perceived inequities are then used by the government to spend our tax money on luxury yachts.
So NOBODY could be bothered to read even the short excerpt? Entirely different bridge, folks. They are talking about the seismic retrofit to the western span which connects Treasure Island to San Francisco, not the new eastern span.
Third World governance is now, as in Detroit, starting to take its toll. People are deceived in that it takes a period of time for the fruits of Third World governance to become manifest. California as Detroit under proper governance accumulated massive wealth which takes time even under Third World governance to dissipate. For example, Detroit took sixty years to reach its current state. Slowly, ever slowly at first the rot sets in. Then at an ever increasing rate the “infrastructure” heads towards final collapse all while Mayor WooMoo Mugzabze has fifty billion in the bank, 85 white mistresses, one thousand brand new Rolls Royce, twenty five thousand uniformed retainers with shaved heads and who are trained to scowl.
Malfeasance or misfeasance either way the tax-payer looses.
They WERE made in China.
Haha, we don’t need no stinkin’ facts.
The bridge has shock absorbers??
That’s exactly the kind of cultural luxury the Democrats don’t believe in. It takes away from the boob-belt and golf-club collection of the WH.
” the western span which connects Treasure Island to San Francisco”
Actually its Yerba Buena Island - TI or Treasure Island has a causeway connecting it to the bridge access at YBI.
If the facts stink
u must unthink
Good Herb Island....as far as the best translation Ive been able to find goes.
is there any wonder that there’d be a Good Herb Island in San Francisco Bay?
Nah they didn't need the him on the project. But I am sure the price tag for the structure was close to what such a thing would actually cost, to make it out of gold.
Senator Diane Feinstein and her husband Dick Blum own steel mills in Shanghai.
That is why the democrats ordered the project be done by the Chinese. Its a win—win for the Blums and the communists.
Jerry Brown and former governor Arnold Schwarzenegger also in bed with the chicoms.
Brown is sending a lot of California taxpayer dollars to China as well, he is a penultimate jerk.
And the MSM recently has been praising Brown for solving California’s budget problems, and turning around California. Go figure. A Democrat can do no wrong, apparently.
Big Whoops! You’re right, of course. No coffee yet today. My Dad learned SONAR on TI back in WW II.
Different bridge and project, HT!
There are to bridges connected by an island. This story is about the section that is not being replace. It was built in the 1930’s and I am fairly sure we were not importing parts from china back then.
Naw, I'd guess they're getting excessive piston and cylinder wear from the unexpected daily temperature excursions. Those are big old shock absorbers.
“They could have built a pontoon bridge for half the price and twice as reliable as the monster now standing (but no one knows for how long it will remain doing so).”
So tell us, how would you get up to the level of the tunnel on Yerba Buena Island the feeds onto the western span? That would be some ramp!
You got it right. From the article:
“The original specifications weren’t very clear,” said Bob Schneider, a project manager for Taylor Devices, the North Tonawanda, N.Y., company that supplied the dampers.
Schneider said Caltrans had understated how much bridge movement the dampers would be subjected to on a daily basis from wind, traffic vibrations and temperature changes.
Actually the bolts that are failing were made here in the US. What is vexing to me is that they had them “plated” to protect against corrosion when they knew ( or should have known) that plating causes “hydrogen embrittlement” which makes the bolts susceptible to brittle fracture.
You actually expect FReepers to read an article before commenting? WoW! The Hubris!
I’m 4th gen Bay Area (Oakland). Stationed on TI 60-61. General electronics and RADAR.
It connects Little Africa all the way to Fairyland!
The dampers are not on the new bridge. They are on the old suspension bridge between Yerba Buena island and San Francisco. They are intended to damp out the longitudinal “slamming” motion of one section of the bridge slamming into the neighboring sections during an earthquake. The intent is that when a jarring earthquake is done shaking the bridge, the sections come to a rapid stop rather than continuing to smash each other to smithereens.
To deal with the extra wear and tear, Shuck says, Caltrans is “looking at replacing them in a way that the absorbers don’t have to engage during small movements.”
Simple fix , elongated bolt holes, soft rubber mount bushings or a linkage system that allows for a few inches of movement... these shocks aren’t supposed to damp every .25” movement because of a breeze , that causes unnecessary wear in a concentrated area.
A vintage motorcycle I have sprung three separate seeping-type leaks when the temperature rose to 105F recently. 60 at night. Both rubber seals and metal-to-metal joints. Now at 95 leaking has stopped. Another bike experienced actual damage from excessive expansion of the metal frame (plastic gas tank split -- I have hogged out the mounting holes on the new tank).
So, where is the warranty?
“And the MSM recently has been praising Brown for solving Californias budget problems, and turning around California. “
Brown is simply “basking” in a windfall of investment sales taxes that occurred at the end of last year when there was no certainty about investment tax rates not changing. Brown’s “recovery” is a 360 which later this year will be back on track into the financial toilet. Worse still will be the fact that the RAT legislators wasted no time spending all the windfall.
Actually, the Spanish translates to "mint," of which the most likely species is Satureja douglasii, which goes by the common name "yerba buena." It is a widely distributed groundcover and smells absolutely wonderful when you walk on it.
Yep, the Democrats did spend the windfall.
Well, politically, Democrats control California now. They have all constitutional officers, from governor on down, as well as big majorities in both State Assembly and State Senate. Whatever happens in California can NOT be blamed on the GOP. So when things go south again in California’s financial situation, Jerry Brown will have only himself and his fellow Democrats to blame.
I doubt they spent it they and their buddies merely pocketed any funds.
Remember how a few years ago the French built a bridge with the longest span in the world (or some such record) in 18 months? How long has this construction been going on?
Originally, San Francisco was named Yerba Buena, formally named in 1835 (by an Englishman) after the Yerba Buena pueblo founded in 1776 by the Spanish. And it does mean "good herb", at least that was the intended meaning by the founders. I toured the insides of what remains of the pueblo in the early 1960's, and saw the graves going back to the early days after 1776. My history teacher then, said the pueblo was formally created on July 4th, 1776 - same day as some other event going on elsewhere.
San Fran used to be called something that roughly translates as Good Weed!!!!
The good Saint, were he able to make an appearance today, would tell those guys off but good. He’d surely say the wolves he tamed were more civilized than they. Then he’d preach the gospel... and probably get tossed out on his ear for it.
I like the pontoon bridges like they have in Seattle. They do the job a lot less expensively. So the unions (obviously) exert insane pressure via their Democrat stooges to do it the most expanse way even if done with made_in_China_steel