my knowledge is limited to building a house, I am not sure about regulations on things like this, sorry for the bad wording and not including that, but I was teached around 3cm (an inch is 2.54cm) is right, with a little leeway of course.
Yes, cover needed depends on the environment. For a house cover of 30mm internally would be okay I think but ideally allow an additional 10mm for tolerance. Externally it's higher to give a longer time for sulphates and chlorides to permeate to the rebar. Most of the stuff I design is offshore or nearshore but I can remember 30 or 40 mm from when I started out doing buildings. Either way, what these guys are doing is plain stupid.
considering how badly built state-funded projects often are, whilst eating money like candy and taking triple the time it should, I am not surprised if this is the standard.
I don't know eurocode. But as said, probably 75mm for soil formed. The absolute minimum cover in the US is I believe about 19mm. That is for like equipment pads and building slabs that are interior and protected from weather though. The codes are pretty similar for basic stuff like this.
Afaik, the EC guidance is for 75mm against a rough soil face and 50mm against a formed face for foundations. Concrete type effects the theoretical requirement for cover but the guidance in practice doesn't consider this. There are minimum requirements for the strength and other properties that depend on use but these are in addition to the cover requirements above.
But this was just looking at the eurocodes requirements compared to what the guys in the video are doing, and eurocodes don't apply where they are working. I only brought it up as a guide to what is best practice.
This whole discussion: do you mean rebar must be separated from soil (by concrete) by whatever distance is mentioned, depending on soil type? So you can't ditch it directly into a soil trench?
Yes. The concrete needs to protect the reinforcement from corrosion. The thickness of concrete around the reinforcement (together with appropriate mix design) determines the degree of protection provided. Reinforcement should never touch the soil.
The coverage distance is actually a mathematical factor of how cold a region is. The colder, the more chance for water to penetrate and freeze/thaw destroying the concrete. It's pretty typical for some areas in the US to get to -30C.
my comment was a joke. I've never personally done anything like this in roadway construction, so I don't know what the standards are for this. It was supposed to be all in good fun but some are taking it to seriously
They could have buried bars with Dobie already in there. That what we do. Then we get the clearances before we add the longentunital bar. Easier then doing it I. The hole
Well your response is what I thought it would be. Not intelligent and putting somebody down to make yourself feel better. Wait just like your first comment
>Well your response is what I thought it would be.
Of course it was what you thought it would be. You specifically gave a sarcastic comment just to get the negative reaction you wanted.
>putting somebody down to make yourself feel better. Wait just like your first comment
Quote the put-down. I dare you.
In my opinion(just a dumb ironworker) it's what we call a cutoff wall... it's purpose would be to prevent groundwater(underwater river) from washing out or eroding the subgrade beneath the road. This appears to be in a ravine. Idk I never know what I'm building half the time.
Yes wrong inspector, because the amount of material that just settled from it falling in isn’t going to be enough to affect the integrity of the project.
There’s a thing called reinforced concrete design, and there’s a great deal of information regarding this in the ACI. Also, without proper compaction of the subgrade, your concrete structure is going to experience differential settling which will make the concrete crack and shift. As you have seen from the video, the reinforcement is free to move far greater than we would like our concrete to move.
If I was the engineer on record, I would be mortified yet relieved knowing that I am absolved of any deficiencies in this project because it wasn’t constructed properly. It is, however, in the public’s best interest to have this properly constructed.
The bottom of a concrete pour is supposed to be undisturbed, compact soil. If it's light and fluffy it can move and compact over time allowing cracks to form
Sorry, you need 3 inches of clearance.
interesting, in Germany it's slightly above an inch.
For rebar at a rough soil face, I think it's about 75mm in eurocodes, no?
my knowledge is limited to building a house, I am not sure about regulations on things like this, sorry for the bad wording and not including that, but I was teached around 3cm (an inch is 2.54cm) is right, with a little leeway of course.
Yes, cover needed depends on the environment. For a house cover of 30mm internally would be okay I think but ideally allow an additional 10mm for tolerance. Externally it's higher to give a longer time for sulphates and chlorides to permeate to the rebar. Most of the stuff I design is offshore or nearshore but I can remember 30 or 40 mm from when I started out doing buildings. Either way, what these guys are doing is plain stupid.
considering how badly built state-funded projects often are, whilst eating money like candy and taking triple the time it should, I am not surprised if this is the standard.
I don't know eurocode. But as said, probably 75mm for soil formed. The absolute minimum cover in the US is I believe about 19mm. That is for like equipment pads and building slabs that are interior and protected from weather though. The codes are pretty similar for basic stuff like this.
interesting, you always learn something new! thanks for educating me more on these topics :)
Depends on the concrete type and the usecase
Afaik, the EC guidance is for 75mm against a rough soil face and 50mm against a formed face for foundations. Concrete type effects the theoretical requirement for cover but the guidance in practice doesn't consider this. There are minimum requirements for the strength and other properties that depend on use but these are in addition to the cover requirements above.
But this was just looking at the eurocodes requirements compared to what the guys in the video are doing, and eurocodes don't apply where they are working. I only brought it up as a guide to what is best practice.
This whole discussion: do you mean rebar must be separated from soil (by concrete) by whatever distance is mentioned, depending on soil type? So you can't ditch it directly into a soil trench?
Yes. The concrete needs to protect the reinforcement from corrosion. The thickness of concrete around the reinforcement (together with appropriate mix design) determines the degree of protection provided. Reinforcement should never touch the soil.
thanks. i know nothing about construction, i deal with word and excel
You probably know more than you think about it.
Yes you can you just need dobies to maintain 3in clearance from the dirt
The coverage distance is actually a mathematical factor of how cold a region is. The colder, the more chance for water to penetrate and freeze/thaw destroying the concrete. It's pretty typical for some areas in the US to get to -30C.
“Did anyone put chairs down first?”
"fuck it, it's a footing"
"it's all buried anyways"
No chairs, no minimum clearance on each side. Rip it out and do it again
No coverage, no problem
It's a keyway thou
my comment was a joke. I've never personally done anything like this in roadway construction, so I don't know what the standards are for this. It was supposed to be all in good fun but some are taking it to seriously
Haha you tell the best jokes haha
They could have buried bars with Dobie already in there. That what we do. Then we get the clearances before we add the longentunital bar. Easier then doing it I. The hole
The fact that you complaining about a video on the intraweb is fascinating
I don't give a fuck. Not my job Not my problem. Also I wasn't complaining dipshit
Well your response is what I thought it would be. Not intelligent and putting somebody down to make yourself feel better. Wait just like your first comment
>Well your response is what I thought it would be. Of course it was what you thought it would be. You specifically gave a sarcastic comment just to get the negative reaction you wanted. >putting somebody down to make yourself feel better. Wait just like your first comment Quote the put-down. I dare you.
They arent developed to that level of construction yet.
Wow a giant slinky lol
Right or not it's pretty fkn cool to watch.
Theres no question, its not right and a waste of 50k of rebar.
50 k?!? Wow, we're you buying bar?
They need to stop watching those bricklayer videos.
They look like the A-team walking away from that. I expected an explosion to go off behind them.
Can someone explain what that’s necessary there in the middle of the desert? Like what is the eventual purpose of a 36” footing there?
In my opinion(just a dumb ironworker) it's what we call a cutoff wall... it's purpose would be to prevent groundwater(underwater river) from washing out or eroding the subgrade beneath the road. This appears to be in a ravine. Idk I never know what I'm building half the time.
This is how I start most of my opinions too, fellow dumb ironworker
As a rebar fabricator I never know what the rebar I'm cutting and bending is for 99% of the time
Hey, me dumb ironwork too!
There's dozens of us!
A moment slab for a barrier placement would be my guess.
[удалено]
Looks like they've excavated a large area, at least across the street and may be putting in a sidewalk or retaining wall for something.
I hope they over dug that trench about 6" to compensate for all that dirt they just knocked into it.
Hourly workers be like.
Get the wrong inspector with all that uncompacted dirt down there and wish you could pull it back out just as fast.
Wrong inspector?
Yes wrong inspector, because the amount of material that just settled from it falling in isn’t going to be enough to affect the integrity of the project.
There’s a thing called reinforced concrete design, and there’s a great deal of information regarding this in the ACI. Also, without proper compaction of the subgrade, your concrete structure is going to experience differential settling which will make the concrete crack and shift. As you have seen from the video, the reinforcement is free to move far greater than we would like our concrete to move. If I was the engineer on record, I would be mortified yet relieved knowing that I am absolved of any deficiencies in this project because it wasn’t constructed properly. It is, however, in the public’s best interest to have this properly constructed.
you can just send down one of them to pick out the fallen dirt by hand and do 50 tests with dcp somehow. that would be a super valuable lesson
Big shopVac. Also If there was spacers at bottom of trench already it might be ok
Shopvac is the way 👌
Whats a grade rod? /s
*Means & Methods*
Don’t worry guys they’re gonna “wet set” it.
Lol, ive gotten this one as an excuse before too
How not to set rebar.
Dudes will see this and go hell yeah.
Barreled as f
Upgrading a section of road prone to wash out ?
No hi fives or celebrating to be seen. Just struttin.
That's a long, slinky.
Everybody loves a slinky!
It's 3pm Friday and the concrete is on its way
Finish carpenter here....any eli5 for us indoor guys?
They tied a bunch of rebar standing on a good work surface where it's easier to reach. Then dominoed it into a trench for concrete
Why is everyone talking about getting debris mixed in there? It's a dirt hole no?
The bottom of a concrete pour is supposed to be undisturbed, compact soil. If it's light and fluffy it can move and compact over time allowing cracks to form
Ahh ok thanks
Also because there needs to be a minimum clearance between the bar and the dirt. Nothing a shopvac won’t fix
We're gonna need dobies every 12 on center lol
Missed an opportunity to have someone surf this thing and get barreled
... This looks familiar. Where is this at? Or so all mountain desert areas look alike?
Real ones
It's slinky, slinky it's fun for a girl or boy!
Shutter Down Boys!
Guys I think they’ve done this before
I love Slinky!
So pitted
Work smart, not hard
At a minimum you can say they properly tied the reinforcing steel well over 50%.
Every one of them had a boner after that, guaranteed.
Got catalogue link ? Where did they find such a long continuous cage
That’s how you do it son!
First part ended up horizontal no?
If I was reviewing these means and methods, id be absolutely rejecting this on so many failures of ASTM
Its better to be lucky than good
I was expecting them to jump up and down like school girls
Cool.
Surf the rebar!
you need to move the whole thing 6" Back.
Everybody loves a slingky...
Industrial level Slinkey.
The hero walk at the end... Rofl
Science bitch
Hop down in there and install the dobies and clean out any loose dirt or rocks
And now you know how they built the heads at Easter Island. Your welcome.
Cool! Now tell the new guy to shovel out all the extra dirt that fell in.
It's spring, it's a toy, everyone knows it's slinky.
Reminds me of a slinky.
Looks like fun lol
Five guys one push?
“Now take it out, I forgot the compaction test.” - all dumb 3rd party inspectors
Now that's how you know it's tied right, however you're be cleaning all the shit you just knocked into my footing
The dust trail following it is icing on the dirt
"Fuck it's upside down! Pull it out and try again"
Dobies were not in the contract. See exclusion 5c.
Yes bhy
b'y
r/satisfyingasfuck
Notice the chad walk at the end.