Transverse Post Tensioning of Bridge Girder
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- Опубликовано: 15 янв 2017
- Transverse post-tensioning is done to strengthen the deck slab (or sometimes diaphragm) in direction perpendicular to traffic flow. It's purpose is similar to longitudinal post-tensioning, only the direction of application is different. It is usually done in bridges where the deck width is large, which makes it difficult to design the deck slab conventionally.
Хобби
No procedures, no QA , and workers speaking Spanish - I guess this is a reenactment of the FIU bridge tensioning work. I especially enjoyed watching the guy trying to get a reading with that digital vernier caliper. I guess the mantra here is design it with a micrometer and built it with a yard stick.
Shut the fuck up
It took this guy 2 minutes to get a caliper reading! Made my eyes hurt!
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Civil Engineering, I hope to GOD this is not a REAL bridge that people walk on or Drive on! Seriously you need competent workers.
Maybe there is a required elongation to attain the required tension on each rod also in the absence of calibrated tensioner. The reason why they are taking measurements.
Where is this bridge and is it still standing? I don't ever want to go there.
That dude stands in the line of fire. If one of those cables snaps when it's being jacked it will go right through him.
Seems to be a lot of uncertainty on the lengths of those strands. Would it not be very important to stretch them equally in length? I am getting nervous about bridges and high rises now that I am learning about pre stress and post tensioning.
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THE REAL, Me too. My Bridge phobia is reactivated. I definitely don't stop under them anymore. The fact that no one is coming forward to explain things does not help.
The cable when tensioned to the proper force will elongate an exact amount according to length. The engineers should be providing that data for the installers.
What’s not clear is if the cables were all the exact same length on the working end when they started tensioning. In fact that measurement is irrelevant. The measurement that is important is the amount the cable stretches during tensioning.
just measure the ram movement...the cable past that isn't going to change unless it slips.
They don’t know how to use their equipment correctly .
Its India, surprised?
The sad part is, I think this is a demonstration video to show how it's done.
Same guys on the Florida (FIU) Bridge.
These methods are fine so long as the cable remains secure and the concrete is a perfect blend, both of which in my 30 years of engineering are not always the case!
In an Unbonded Post-Tension application there should be a level 1 qualified installer, a level 2 qualified inspector and a level 3 qualified designer.
The lvl 2 inspector reports back to the designer such criteria as tenon profile prior to concrete placement, date and times of placement and tensioning, mix design, core samples and the amount the cable/s have deflected (stretched). It’s the design team’s (engineers) responsibility to determine then if they will sign off on the work or not.
You can get more information at the Post-Tension Institute if you like.
OMG make a proper stand for a base to assemble the devise on just make it once and repeat .Please!
I can't believe they actually put their company name on this video
I wonder, could a cable snap? Might cause an injury when turning the restraining-collar nut bare-handed.
It’s possiblebut very uncommon. However a glove wouldn’t help in that case. A tensioned cable will pull back into the concrete if there is a break. The danger zone is usually above the cable in question. That’s why no one should be allowed to be around other than those doing the tensioning.
It showing exactly how To Not Do It
Send three of the guys out to clear the work area for the next cables and have the two bigger guys do the work. Give the fellow trying to put the collars on five bucks to go get coffee for the crew.
I like the sunglasses
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Cheap labor and they know it. Like watching a disaster in the making.
Big Brother
Your name says I like to tattle.
It seems that they will be stressed enough before they could stress the tendons!!! 😂😂😂😂
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Hahaha True
Civil Engineering Bitz!! Dbgjbchbhbcjvmgbmjh
Chq
These guys are shoemakers!
Barapa kekuatan daya tarik antara seling ke seling?
Omg, seriously?!?!? Using a rickety stand and a broken piece of wood. Omg.
I don't think they even swept the place where they set that make shift base. That broken chunk of wood! Priceless!
hope they didn't built any bridges here in America
Bridges in America fall into the river anyway. ruclips.net/video/Ucflj-MsJBI/видео.html
very scientific...
equipment is new, but not experience and dangerous
Safety first !!! Where is PPE ?
unsafe
Consider adding "Trying To" to the video title
Jury-rig anybody?
This much of project work ,there is no proper height adjustment fixtures not provided,due to lack
Of mechanical enggrs.and hyd
Puller only available and depended
On that.
Chinese is leading them on this project, great china!!! my love country, my home!
No co ordination in team
why not use helmet?
Unprofessional, chaotic, construction staff lack of safety awareness!
I have zero confidence in what I've just seen. I would think some sort of tensioning gauges. Measuring with a caliper? Is this disaster footage or some sort of a joke?
Lagi pula jokowi gak butuh dukungan manusia penghasut dan kufur nikmat sepertimu...
They should build it like the Chinese, faster and stronger.
Thanks.
Same engineering of Florida bridge
the comments...
wow, that's very stressful to watch...
Ansave condition ...
Unprofessional work, being done by uncertified technitians...no engineers with bad equipments for setup...😰
Primitive skill
This must be an Indian or Parkistan contractor, why? Nothing is level or properly aligned.
Post tension at its Worst!!
instead of ream alongnation they messering rad its rong
I couldn't watch anymore...
Sounds like ewoks
Mickey mouse crap here.
first
Troppo fatica fate questi lavori in due si fanno e poi la testata deve essere montata non separata e un 06/4 non e tanto pesante comunque buon lavoro
Bad management of PT
Spend money on company parties save money using under paid under trained people on the front lines!
Fuck la..150ton jack,two ppl push up easy and faster lo...
These guys look inept.
They have no clue what they are doing!
Too close
I swear I couldn’t understand a damn thing they were saying!!
unsafe for worker...👎👎👎👎
Don’t even know where or how to measure.....TII
Neither properly shooted nor detailed during the video. Waste of time watching it. No useful content. Disappointed watching it 😐
HI sorry for the poor quality of the video. Please see ruclips.net/video/s8HFdtdzPoM/видео.html for detailed info
so this is how it's done in some third world shit hole. I hope like fuck I never end up driving on that bridge.
Have any of u know it all commenters gone ahead to see if this bridge (i assume) is still standing and functioning or were u to worried about them not having an expensive stand because most u union workers are fat and lazy. U speak “safety” but workers do the work. Your mouths and entitlements are often to full. LOL. These dudes were working with what they had. Um hey boss I need a better stand. No u need to find a new job, ur fired. Give me your wife as well.
Our working class sucks in America. Too many regulations causing too many shitty workers.
Hope this isn't America
Workers are not professionals,
That is a most unprofessional-looking demonstration.
It look ugly to see idiots do these very high technical engineering magic, I am a shame !!!
Extremely bad video. Total lack if safety and without proper tools or tackles and untrained cheap labors unprofessional and should be removed immediately
That's not your expertise...Better build a wooden bridge.