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OT: Bridge Bib or What Is It?

A

Abbeyfield

Member
What process is inside this bridge bib? This was found on I 29 between Sioux Falls and Sioux City when I went thru recently, and on a different bridge a week later. The white semi trailer van is not attached to a tractor, and I could guess it might open into the bridge area to furnish equipment or services to whatever they are doing to the bridge. The covering also enclosed the other side of the bridge is similar fashion to what you see here.
a122985.jpg
 
They are blasting and painting the bridge beams. the containment is used as the old beams have lead base paint.
 
Probably sandblasting, inspection, repair A/R, and repainting. Believe trailer is for air pressurization/cleanup inside tent? Do similar here on a lane by lane basis sometimes.
 
Sand blasting and the like, I doubt its for lead paint though. Most likely to keep the sand from crossing the windsheild of a car going by at 70 MPH. That and the looky loos from driving into the construction zone when they are rubbernecking at the guys working (lots of people haven't seen men work before).
 
It's like a blindfold for a person in front of a firing squad. The workers can't see the idiot that's about to hit'em.
 
Exactly Case e,I have a friend who does commercial sandblasting and he says it is an absolute pain doing bridges etc,you have to recuperate all the blast material and sand because of the lead based oxide paint..it has driven up the price and the work of every job,he isn't bidding on stuff like that any more ,he can do better in his big blast shop and cleaning up is easy compared to outdoors jobs
 
There's that too.

Prevent heart attacks in the workers by not seeing how close they came to losing their life several times a day.
 
the trailer is for producing negative pressure inside the enclosure to reduce the escape of rust, blasting medium, and paint. Similar setups are used for asbestos abatement also.
 
A contractor went broke doing the Mississippi river bridge at Quincy IL some years ago. It seems he was not returning enough sand and paint, they had an amount they could loose to the river and they lost too much,the fines sent them under.
 
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