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PRE-STRESSED CONCRETE
YOUTUBE ^
| SHAY MURTAGH
Posted on 03/16/2018 6:42:02 AM PDT by knarf
Seven ,minute, very good explanation of pre-stressed concrete
TOPICS: Business/Economy; Miscellaneous; News/Current Events; Unclassified
KEYWORDS: concrete
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To: buffyt
I think engineers are the smartest ppl n the world. Ah garsh....
To: Charles Martel
When doing inspections, I see many residential post tension slabs with the ends rusted off. Even the anchor plate is gone.
22
posted on
03/16/2018 7:52:15 AM PDT
by
Deaf Smith
(When a Texan takes his chances, chances will be taken that's fore sure)
To: Real Cynic No More
Beam loading calculation 101..
23
posted on
03/16/2018 7:54:47 AM PDT
by
shotgun
To: knarf
Very educational and interesting video. Learned much.
And here I’ve thought I was making pre-stressed structures just by having my wife around when the stuff was mixed.
To: knarf
“I’ve had vasectomy with a peel (NO idea what that is) on both eyes”
Need to put on my glasses.
25
posted on
03/16/2018 7:58:53 AM PDT
by
Rebelbase
( Hillary, DNC, DOJ and FBI colluded with a British National to influence the 2016 Pres. election)
To: redfreedom
26
posted on
03/16/2018 8:05:51 AM PDT
by
knarf
(I say things that are true, I have no proof, but they're true)
To: redcatcherb412
They had federal money in the project and they are required to “Buy American Steel”. They can use foreign steel but any project element where it is incorporated will not be eligible for reimbursement. The contractor will get paid but the contracting agency will have to refund the money to the feds.
27
posted on
03/16/2018 8:06:46 AM PDT
by
shotgun
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28
posted on
03/16/2018 8:07:18 AM PDT
by
DoughtyOne
(01/26/18 DJIA 30 stocks $26,616.71 48.794% > open 11/07/16 215.71 from 50% increase 1.2183 yrs..)
To: Charles Martel
They put too much sand in the forms and pull the cables out of the concrete into the sand. I’ve seen foundations where the concrete is less than an inch thick in places.
To: knarf
You would think that one cable snapping wouldn’t cause a catastrophic failure.
30
posted on
03/16/2018 12:11:00 PM PDT
by
Blood of Tyrants
(Conservatives love America for what it is. Liberals hate America for the same reason.)
To: Vaquero
> “Sounds like they used post tensioned not pre tensioned.”
I agree. I did not see any concrete “I” beams underneath the floor, which are generally pre-tensioned. It looked like they were using the entire walkway floor as the bottom flange. That means post-tensioning.
I also read that they were tightening up some cables that had loosened during the move. That means to me that they probably post-tensioned it on the side of the road and did not get the holes that the cables were in fully filled with grout. The cables broke free from the inadequate grout when it was being moved. If so, that was a construction rather than a design failure.
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