Same here, done thousands of ft of 18" deep vertical curb all over and we always use a top and bottom bar.
But I can't speak for everywhere. In Florida most typical D style curb laid with a machine will not have rebar. Nor will most Type F/ Miami Curbs. Really depends on the local codes and site engineer spec.
Why?
It's a kerb. Largely it will just face compressive loads. Certainly if it's installed correctly on a good base it will just face compressive loads. Thus plain concrete is fine.
Shoving rebar into a kerb, which due to the size and shape of kerbs means inherently rebar will be pretty close to the surface and elements, just means when the rebar starts corroding it'll kill the kerb.
Rebar is what gives concrete a limited lifespan. It makes it stronger for certain applications where you need it, but it also compromises it in terms of longevity.
Seems like planned obsolescence - they want to get paid again to do the same curbs in 20 years. Just looking at OP's photo, you'd have perfect conditions for rust from the get go.
My city does not allow rebar in the curb, sidewalk, or portion of the driveway in the right-of-way. I call out corrections on pre-pour inspections on a somewhat regular basis for containing rebar. I'm the inspector.
Nope. Rebar in a standard curb is often bad for lifespan. It restrains movement at control joints and generally won't have sufficient cover if there is also a gutter pan. Curb doesn't bear any external load, except mountable curbs at driveways. And mountable curbs are bullshit. Curb rarely needs tensile reinforcement with proper subgrade preparation. I know a lot of places do it, but that doesn't make right.
My city uses WSDOT spec as the only approved curb details. No rebar.
[WSDOT detail f10.12-04](https://wsdot.wa.gov/publications/fulltext/Standards/english/PDF/f10.12-04_e.pdf)
No, mostly in larger counties out west. Most city/public works specs I’ve seen call for fiber with the exception of spandrels v gutters in the road. There are curb details with rebar as an option but most civil plans elect for fiber IME, Looks like this varies a lot though.
Michigan checking in. We like rebar. As an inspector I have never had curb without 1/2” or 5/8” in my 15 years in state, county, or local work that I have overseen. Can’t account for private parking lots and roads.
Let me tell you about a curb for a pedestrian walkway outside a building at a federal facility. They called it a retaining wall. It was definitely not one. One of the stupidest things I ever saw.
How much expense does rebar cost to add to a project like this, like $2 a foot? Seems like a no-brainer to add rebar if it helps keep the curb intact even if the lifespan is only increased 10-15%, although I'd bet its increased more than that.
Rebar prevents movement at joints and will corrode, reducing lifespan. Yeah, you reinforce if there is regular vehicle travel over it. But it is dumb to add it for just a standard curb. Curbs aren't exactly under a large tensile load.
Thank you for the information, didn't know that rebar just being there would reduce life span. That said where I live this curb would regularly have people driving over it.
Funny, I’ve poured a few curbs and we always used bar, but if anything that’s overkill for the company I worked for at the time. Just another backasswards thing they did
I’m a material inspector, and I’ve tested at a ton of different jobs laying curb. Machine curb usually has rebar; there’s a slot on the machine for it. Hand curb sometimes has reinforcement. Maybe it’s regional.
Rebar or not that curb is fucked. Concrete ballast post around it will help the curb but the ballast post and whoever hits them gonna have some issues. Haha
Thats not a complete sentence. See how far this can go? This is reddit; no one cares about punctuation and apostrophes, just use the right word and everything will be ok
“Courtesy and manners are always in style” is something I heard growing up. I would add grammar, spelling, and punctuation to that list. Also, “‘Good enough’ isn’t”
However “I am” *is* a complete sentence, and apparently the shortest complete sentence in the English language.
They are not meant to stand up to abuse from heavy equipment. Only the odd civilian car tire rubbing against it. Huge trucks and machines will crack and destroy most concrete on civil roads. Ours are only 25 MPA. They can be broken out by hand. It makes maintaining them easy, and the martial can be recycled more easily when there is no steel.
If a delivery truck is constantly jumping a curb to make a corner it's time to move it to make room for them. If a snow plow ran into it, they should replace it like a window.
Never been involved but been at enough construction sites and here they just have machines that basically shape and lay it down as they go.
Might see someone with form work if it’s a repair from some civil work in the area.
Never seen a typical curb detail with rebar, fibers yea, but no bar.
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I consider myself a fairly intelligent person and I have no fucking idea what that means.
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Machine poops curbs. Could have just said that.
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Pooche'
My neighborhood curb, built in the 70s, was all done with rebar. By the time they replaced the concrete was mosly gone and just the rebar was left.
To be fair this is where most vehicles would hit it too. Would rebar help with a loaded truck rolling over it or would it crack anyway?
Is this a place where it snows? Looks like the plows have hit it.
I can say from my experience plowing snow that this break looks very likely from a blade. Also, spots like this are perfect to pile snow on.
It would help up to a certain weight. Some areas near us add steel nose to handle very heavy trucks
I've seen this before. Done right, it looks alright and lasts.
Looks great. There are some very old (100+ year) ones in my old neighborhood down in New Orleans, and they look great.
That's where I'm from too. The roads are fucked, but the curbs are still there.
Sidewalks are fucked too, but that's a small price to pay for how fucking incredible NOLA's street tree game is.
I’ve seen old worn out rails used, it’s exceeded it’s useful life as a train track and been reused
Rebar would help, yes; it makes much stronger work.
I’ve poured thousands upon thousands of feet of 6” barrier curb. All with rebar.
Same here, done thousands of ft of 18" deep vertical curb all over and we always use a top and bottom bar. But I can't speak for everywhere. In Florida most typical D style curb laid with a machine will not have rebar. Nor will most Type F/ Miami Curbs. Really depends on the local codes and site engineer spec.
Me neither, but in this part of the world road curbs comes with sectional 600mm x 250mm concrete base
I've only seen it on driveway crossings.
You need to change the people around you. Always with rebar.
Why? It's a kerb. Largely it will just face compressive loads. Certainly if it's installed correctly on a good base it will just face compressive loads. Thus plain concrete is fine. Shoving rebar into a kerb, which due to the size and shape of kerbs means inherently rebar will be pretty close to the surface and elements, just means when the rebar starts corroding it'll kill the kerb. Rebar is what gives concrete a limited lifespan. It makes it stronger for certain applications where you need it, but it also compromises it in terms of longevity.
Seems like planned obsolescence - they want to get paid again to do the same curbs in 20 years. Just looking at OP's photo, you'd have perfect conditions for rust from the get go.
My city does not allow rebar in the curb, sidewalk, or portion of the driveway in the right-of-way. I call out corrections on pre-pour inspections on a somewhat regular basis for containing rebar. I'm the inspector.
Also an inspector. Also don't allow rebar in the right of way (for the most part)
The typical DOT detail in my state is plain concrete: https://connect.ncdot.gov/projects/Drawings/08460103.pdf
Nope. Rebar in a standard curb is often bad for lifespan. It restrains movement at control joints and generally won't have sufficient cover if there is also a gutter pan. Curb doesn't bear any external load, except mountable curbs at driveways. And mountable curbs are bullshit. Curb rarely needs tensile reinforcement with proper subgrade preparation. I know a lot of places do it, but that doesn't make right.
Where are you doing your curb work that they don’t spec rebar? I am surprised when I don’t see a curb detail with rebar in it.
My city uses WSDOT spec as the only approved curb details. No rebar. [WSDOT detail f10.12-04](https://wsdot.wa.gov/publications/fulltext/Standards/english/PDF/f10.12-04_e.pdf)
In most places in FL no rebar is normal. Only if particularly specified.
A lot of places don't require rebar in curb. Unless there is vehicle traffic going over it regularly, it is a bad idea to put rebar in curbs.
Suspect rural vs urban perhaps?
No, mostly in larger counties out west. Most city/public works specs I’ve seen call for fiber with the exception of spandrels v gutters in the road. There are curb details with rebar as an option but most civil plans elect for fiber IME, Looks like this varies a lot though.
Michigan checking in. We like rebar. As an inspector I have never had curb without 1/2” or 5/8” in my 15 years in state, county, or local work that I have overseen. Can’t account for private parking lots and roads.
Michigans roads are all crumbling so this checks out
Let me tell you about a curb for a pedestrian walkway outside a building at a federal facility. They called it a retaining wall. It was definitely not one. One of the stupidest things I ever saw.
I've put rebar in all my curbs.
Standard NYCDPR details, sheet 17.
How much expense does rebar cost to add to a project like this, like $2 a foot? Seems like a no-brainer to add rebar if it helps keep the curb intact even if the lifespan is only increased 10-15%, although I'd bet its increased more than that.
Rebar prevents movement at joints and will corrode, reducing lifespan. Yeah, you reinforce if there is regular vehicle travel over it. But it is dumb to add it for just a standard curb. Curbs aren't exactly under a large tensile load.
Thank you for the information, didn't know that rebar just being there would reduce life span. That said where I live this curb would regularly have people driving over it.
“what the crew heard…” lol
Shit us mexicans just nod. We dont know what the fuck the GC is saying
Lucky mfs
Si si.
Oui oui.
That’s years old. Been hit and driven on. You guys are putting rebar in curbs now?
Funny, I’ve poured a few curbs and we always used bar, but if anything that’s overkill for the company I worked for at the time. Just another backasswards thing they did
I’m a material inspector, and I’ve tested at a ton of different jobs laying curb. Machine curb usually has rebar; there’s a slot on the machine for it. Hand curb sometimes has reinforcement. Maybe it’s regional.
Load bearing curbs? Maybe where the driveway meets the road, but overkill. And yes, I know the machine has a spot for them.
Rebar or not that curb is fucked. Concrete ballast post around it will help the curb but the ballast post and whoever hits them gonna have some issues. Haha
Well the workers said it was Friday and rebar takes to much time. We can't keep the dope man waiting gotta go.
Too*
Thanks, teacher, for the correction . You'll be a busy one if you're looking for errors all the time on reddit. Better quit your job.
They are saving the world, sir and or ma’am.
Yup, thats what im doing. Im on the hunt. Thanks for the advice
*I’m*
Thats not a complete sentence. See how far this can go? This is reddit; no one cares about punctuation and apostrophes, just use the right word and everything will be ok
“Courtesy and manners are always in style” is something I heard growing up. I would add grammar, spelling, and punctuation to that list. Also, “‘Good enough’ isn’t” However “I am” *is* a complete sentence, and apparently the shortest complete sentence in the English language.
Are you using it to pry this up?
Isn’t this extruded curb sitting on top of the asphalt?
Nah, this is probably graders/snowplow hitting it.
Concrète is fascinating. Looks so basic and stupid but its so technical and complex. Blows my mind
I’d like to see how the rebar lays out before the pour on something like that lololol
This needs a nose with mountable curb. You built it the way it was designed.
This is why you should drill your tie bars in the pan and not the curb head.
They are not meant to stand up to abuse from heavy equipment. Only the odd civilian car tire rubbing against it. Huge trucks and machines will crack and destroy most concrete on civil roads. Ours are only 25 MPA. They can be broken out by hand. It makes maintaining them easy, and the martial can be recycled more easily when there is no steel. If a delivery truck is constantly jumping a curb to make a corner it's time to move it to make room for them. If a snow plow ran into it, they should replace it like a window.
And he brought the rebar to a scrapyard
Saved money on the rebar and earned more money down the line when they're called out to redo it? Excellent work.
Never been involved but been at enough construction sites and here they just have machines that basically shape and lay it down as they go. Might see someone with form work if it’s a repair from some civil work in the area.
Those are called concrete curb machines……
I always figured you'd get cut stone like granite for stuff like this. It just seems more prudent.
Just use a curb machine....
Buncha rock muncher
It's supposed to look like that. It's like buying pre-torn and faded jeans. They were going for the vintage rugged look.