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The Construction Thread

thør said:
I'd bet the end is a closed box. So they have to cut it and weld in a new end to the box. Not a huge job. Prolly costs less than the crane rental.
Click to expand...

Doesn't look like it in that picture. Just looks like a big beam with a cope.

I know the box beams you are talking about, that would be more of a job.
 
Maybe that's just a stock photo. Someone image-googled "bunch of engineers standing around beam"

I like the guy quoted as saying "It was really the right length, except at the end, where it was a little too long."
 
rosco rathbone said:
Doesn't look like it in that picture. Just looks like a big beam with a cope.

I know the box beams you are talking about, that would be more of a job.
Click to expand...

I would figure the torsional stiffness of a box might be required for 258' long. And it's hard to tell exactly what it is from the photo, other than a buncha guys saying, "Duh!"
 
rosco rathbone said:
Maybe that's just a stock photo. Someone image-googled "bunch of engineers standing around beam"

I like the guy quoted as saying "It was really the right length, except at the end, where it was a little too long."
Click to expand...

Who brought the hand level to the party?
 
thør said:
I would figure the torsional stiffness of a box might be required for 258' long. And it's hard to tell exactly what it is from the photo, other than a buncha guys saying, "Duh!"
Click to expand...

Yeah, that piece in the picture doesn't really look like it fits the description. That's a long span. Probably just reporters who didn't know what they were talking about.

thør said:
Who brought the hand level to the party?
Click to expand...

"Ok, my 3-foot level is showing that this 250-foot beam is lying level. So if I level up from here, that should give me a square cut..."
 
rosco rathbone said:
Yeah, that piece in the picture doesn't really look like it fits the description. That's a long span. Probably just reporters who didn't know what they were talking about.



"Ok, my 3-foot level is showing that this 250-foot beam is lying level. So if I level up from here, that should give me a square cut..."
Click to expand...

Just cut the fucking thing and lets get going...its screwed now anyway.
The paint is gonna be all fucked up.
Why do we gotta cut both ends.

There's nothing wrong with my beam...the concretes out
 
Last edited:
"It is level. The little bubble is centered. Mark it."


"Is the beam level?" :confused:


:mad:
"I SAID MARK IT!"
 
chillywilly2 said:
here...I got a Bic...lets just get going
Click to expand...

No oxygen pressure now. :cool: Hey don't look at me, I been up here all day.

SaintPeter said:
"It is level. The little bubble is centered. Mark it."


"Is the beam level?" :confused:


:mad:
"I SAID MARK IT!"
Click to expand...

That reminds me of setting orthotropic roadway panels on a suspension bridge. Our gang had to align the first row and dog them off. It had to be done with 1/16th inch precision, so they used a cheap combo square and a plumb bob hanging down held by the foreman. I usually ended up underneath reading it. Since tractor-trailers were going by full speed four feet away, it never stopped swinging.

"Is it good?"

"Hold on...."

"Fuck, come on! Is it good or not!"

"uh....hold on..."

In my mind's eye, I kept seeing the whole roadway coming out way off on the other end, which in fact happened. But it was all ok.
 
You get what you pay for.....

Walmart beams?

From sfgate.com:

"State and regional transportation officials warned Wednesday that the planned completion of the Bay Bridge's new east span in late 2013 may be delayed and exceed original cost projections.

The bridge-replacement project has been hampered by manufacturing problems in China, where major portions of the steel suspension bridge are being prefabricated, and with challenges in completing the detailed blueprints that specify how the structure will be built.

"We are very concerned about the progress," said Andrew Fremier, deputy executive director of the Bay Area Toll Authority, one of the government entities overseeing the project.

The first shipments of steel roadway sections were supposed to arrive from China last October. The new target date is next month.

"What this does is put us a year behind in fabrication," Fremier said.

With seven more shipments scheduled, it is unclear whether the delay with the first one will create a domino effect and set everything back. Fremier said it's possible to make up for lost time. However, he could not say with certainty whether the 2013 completion goal would be met, or, if it is pushed back, by how long. He said bridge officials should have a better idea next month.

Top representatives from the Bay Area Toll Authority, the California Transportation Commission and Caltrans jetted to Shanghai last month for a meeting with executives of ZPMC, the manufacturer that lead bridge contractor American Bridge-Fluor hired to help fabricate the span.

The visit found that there are continuing problems with structural welds used in the construction of the decking and beams. The work is done manually. Workers have been repairing the flaws after they're found by on-site inspectors, but the process is time-consuming, Fremier said.

Bridge officials are working with the manufacturer to prevent the bad welds from occurring in the first place, Fremier said.

While the weld problems have caused delays, Caltrans' Bay Bridge project spokesman Bart Ney assured the public that the steel structures will not ship out until they meet specifications set out by bridge officials. Caltrans has inspectors in China.

Another major concern is the delay in finishing the schematic designs, which are being drawn up by a team in Vancouver, British Columbia.

The holdup involves the trickiest section of the new deck that will serve as the east-end anchor for the suspension bridge cable. The section includes a curve and a rise in elevation, compounding the difficulty in crafting the design, Ney said. He said more staffing has been deployed to Vancouver to speed things up.

The single-anchor suspension bridge and skyway, which will run from Oakland to Yerba Buena Island, will replace the 73-year-old east span.

The revised estimated cost of the single-anchor suspension bridge portion of the Bay Bridge rebuild project is $2 billion. That's $300 million more than budgeted. However, the project is not considered over budget - yet - because only $787 million of the approved funding has been spent. The total projected cost of the replacement project is $6.3 billion.

Funding comes from toll revenue and the state.

The old structure partially collapsed in the 1989 Loma Prieta earthquake. Last weekend, when the bridge was closed to traffic to complete a temporary detour east of Yerba Buena, inspectors found a crack on a structural beam on the east span that had to be repaired before the bridge could reopen.

Despite progress in the Bay Bridge project, problems persist, said Bay Area Toll Authority chief Steve Heminger, Caltrans Director Randell Iwasaki and state transportation commission boss Bimla Rhinehart said in a joint report.

"We have encountered and will continue to encounter challenges in keeping the project on schedule," they said."
 
thør said:
I have a lot of respect for the quality of the industrial products I've seen from Hyundai
Click to expand...

The orthotropic deck sections were very pretty.

The problem was that patching the worn-out places in the grit they surface them with turned out to be a huge problem. I met a guy from the bridge maintenance authority in a bar years after that job and he told me that you had to shot blast, control the temperature, all kinds of crazy shit just to patch the holes. They can't shut the bridge down long enough to do it.

I've got pictures of what it looks like now, all kinds of bare steel showing through. Someone is going to wreck because of slipperiness one of these days.
 
rosco rathbone said:
The orthotropic deck sections were very pretty.

The problem was that patching the worn-out places in the grit they surface them with turned out to be a huge problem. I met a guy from the bridge maintenance authority in a bar years after that job and he told me that you had to shot blast, control the temperature, all kinds of crazy shit just to patch the holes. They can't shut the bridge down long enough to do it.

I've got pictures of what it looks like now, all kinds of bare steel showing through. Someone is going to wreck because of slipperiness one of these days.
Click to expand...

The coatings were prolly specified by the design engineer who may never have gotten out of his office.
 
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