Don't under estimate how much variation from the concrete suppliers too. It's measured by weight which means that additional water (think a sloppy mix for pumping) will change the wet density and then the calculated volume by mass. I had a pretty decent argument with my concrete guy about this as I was filling 1m3 forms so knew exactly how much I needed per form and under supplied by 30%. I told them I don't care about the density difference as they sell it per m3 so if I order 4m3 I expect a minimum of 4m3.
Wow Scott! I don’t know how they taught you in NZ, but in America, it’s pi times the radius squared, times the depth of the hole. I always get the exact right amount. Don’t subtract the post volume, and add only 10% waste. Been doing this almost 30 years now and haven’t screwed it up, yet. Cheers, mate!
Always a pleasure watching the Casey Neistat of builders doing his thing! Almost therapeutic for some reason. Wish the episodes were longer and per project.
Hi mate. 20 years exp in fencing in outback Queensland and a rule of thumb we used for ordering concrete for round holes was divide the square cube amount by 14 and x x 11. Add 10% and round up to next .2. Never ran out in 20 years and normally little wastage. Overall congrats on a great job 👍Cheers. Jack and Mandy from Mount Isa
Maybe I missed something, but I'm surprised you came out short, because you calculated volume for a cuboid instead of a cylinder (square vs circular base), so your example calculation is off by 0.07 m3 more concrete (about 27% more concrete on every hole). So either wastage was much higher than you estimated or there was other error I can't see.
@Mario bar10005 is correct. Scott calculated with only 13% waste (0,15/1,15) and got it about right. If he calculated in a more sensible way (with a circular base instead of a square one) he would have gotten even less concrete. Maybe luck, but could also be standard procedure in the business to calculate this way cause it is actually easier (not have to use π....) and compensate it with less added waste. What do I know. A cuboid with a square base will always be 4/π bigger than a cylinder with the same diameter as the square side and same height.
Staffan Ek Thank you for pointing out the math equation possibilities. A little more figuring goes into the ordering process than what I realized. Scott- I love the spray paint fill to here lines takes the guesswork out. It reminds me of the markings on the German beer glasses. Keep the videos coming! Great work!
Perhaps we can also add the assumption that if the hole was perfectly round all the way down, and that the post hole borer didn't take anything off the sides, the measuring would've been more accurate! :-) But yes, there was a LOT of waste!
My concrete pump guy suggest all holes size add 30-50mm to the hole size. When the digger pulls the auger out off the holes, it creates the holes bigger. Small jobs will not be a problem, but at a job, I ordered 18.5m and it used 24m at the end. The 50mm extra dimension makes a huge difference. It works every time. Good video! Well done!👍
Hey Scott man I’m 13 and from Australia SA, keep up the great content and I love your style your so good at carpentry and it inspires me to get some sort trade.ps I want to eat chef paerous food I’m sorry if I spelt that wrong haha
I've found concrete plants get quantities wrong, won't mention any names, one year we were short by a whole truckload, according to the supplier, but the thing was our slab, even though it was a random shape it was consistently built and the volume was calculated from the 3d drawing, so to say we were a truck short didn't stack up. Also a year later same company, we were about half a meter short on a not very big pour, really simple to measure when it's an oblong. The truck driver got angry when he was sent back to top it up. the truck drivers were doing the batching themselves, found out through a workmate on another job same truck driver was short for them, and again simple oblong shapes, always adding a wastage percent too. But on a POSITIVE :) we always have a competition who can guess the amount the closest before its measured. Some just make a guess others use the "eyecrometer" to guess, always fun :) good work, the retaining wall mission is almost done huh?
Hi Scott love the videos. In England we have lorries that mix the concrete on site so you only pay for what you use. Very handy when it’s difficult to add up volumes. Not sure if you have them in New Zealand but I’d highly recommend
smokingcheeba420 that’s exactly right. I don’t want to keep acting like I know what I’m doing. I’d rather be the one to go out and figure out and then do it myself. I don’t mind giving up that design process.
Not sure if anyone has mentioned this but when using a concrete pump allow at least 1/3 M3 of concrete on top of you calculation (including waste) as the pump can hold that and will clean that out later.
sometimes the order will be short because the batching plant fklded up. If there is two people on site get both to do calculations then compare ,its a double check using more labour but worth it.
I leaned along time ago to never subtract the post volume it generally evens itself out its such a hassle coming up short. Better to be over i always order .200 extra
when you calculated you used volume of a rectangle not a cylinder On big jobs I’ve found it’s also very easy to over order concrete and get charged return fees Using your paper example - Pie (3.14) x radius of hole, squared x height 3.14 x 0.04 x 2 = .25 .25 - 0.4 (post volume) = .21 conc per whole
You'll find that 400mm drilled holes will ream out to 430/440mm. Also, you can get the concrete pump guys to "blow out" there pump line on the ground near the holes. You can use that concrete to top the holes up, but you get left with a little bit of a mess. Or order extra to allow for the pump.
I probably wouldn’t have removed the volume for the posts. In bigger concrete pumps we calculate a single yard of concrete to prime the pump. My estimation of a yd to m3 is .8. Edit I did the math and a cubic yard is .763 m3
Nice one Scott! There’s a good app called QuickChippy that is great for working out concrete quantities and lots of other building calculations that I use. I generally find its spot on for concrete quantities.
Usually theres about a 100 litres left in the hopper that the pump wagon cant pump. We usually empty the hopper into a mixing bath and the bucket it out.
Those augers are notorious for over-boring the hole. Also if you have saturated clay, you can get big chunks that just fall in from further up the the hole. Both reasons mean the volume consumed is bigger than you expect.
@@RangieNZ well, as long as those chunks fall into the hole, the volume stays the same? It wasnt removed, and I guess you should measure the actual hole width and not the boring equipment
I work with laying concrete (floors mainly) in norway.. for 3 years now.. on 32-36 meter pumps we add 0.5m3 waste and 40-42 meter pumps we add 0.7m3 waste.. + And do not remove the volume of the logs, it is always better and have a little too much concrete, instead of a little too little concrete.
also you forgot to link this video in the end frames of retaining wall part 2! when I went straight to part 3, i was devastated to have missed the pour.
As always a great and enjoyable video! Is there not an concrete strength issue because there is no plastic lining (for instance) between the dirt and the poured concrete? Here in NL it is always good practice because the wet season makes the concrete to wet and dry season to dry. And doesn’t the concrete crack under the tension of the wood wet/dry contractions? Here it does with that size of pine timber posts but for fences and other esthetic structures that does not matter much.
I always order a yard extra. That expense is nothing compared to being a wheelbarrow short. There is no doubt in my mind, the yard has shorted me. Just part of the job.
awesome job man. concrete guys seem to be cranky no matter what continent haha. who are you cheering for the super rugby playoffs?. take care. pete. if it sounds like bossa nova it might well be. beautiful music
Scott, i think the calc should be, and sorry i dont know all the correct words so ill try. (Diameter/2) * (diameter/2)* pie (pie is something like 3.14)* total length of column. This will calc the total volume of the column. Then just deduct the volume of the post. Hope this helps. ( should prob still round up the total since this is just math and not building :) ) Love the content by the way! Keep it up! Cheers from the Netherlands :)
Cheers for the vid Scott. Always enjoy watching you. However, in fact you would've been even shorter on concrete if you did correct calculations. =) Basically in your calculations you assumed that holes are square but they are rather circular. So the correct formula is actually: Pi*r2*depth=3.1415*0.2*0.2*depth.
Just add all depth... Multiply by a hole surface... You got the total volume, then substract the length of post that will be in concrete multiplied by the post surface (of rhe small face)...
A quick FYI: phone calculators have BODMAS issues, they're a absolute nightmare if you do a single calculation then multiply it for multiple items. It cost my boss £4K not so long ago on a big window job, but it could just as easily have been a larger amount. A quick Google of "phone calculator wrong" and look at the side-by-side pics of folk doing sums on a phone and calculator at the same time and getting different results I'm sure that's why we still get free calculators in little promo notebooks and folders that suppliers give away to us, I just assumed its because they got a bulk deal on them years ago before we all had smartphones, but new companies also give away stuff with them in too, maybe because they've delt with a few of us on the phone trying to understand why our order/quote went so wrong! And Scott, if you read this yourself, its maybe worth dropping this little nugget of info into a video, save anyone else getting bitten the way my boss was! 👀😳
Always more concrete for holes the hole sometimes caves in as you’re drilling them ie rocks heavy clay which requires more concrete to fill them also it Takes about a half a yard to prime the concrete pump which you don’t get back
It’s definitely a good way to do it but if I were to do it I could have calculated it using the cylinder formula using pi, and then subtracting the volume of the post. Then just add them all up
Working with concrete is a hard job. I used to be a proffesional gardener and we build a lot of swimmingpools. For that we have to work a lot with concrete.
the hopper and the actual line takes a fair bit of concrete especially if its a long line, should have gotten a wheel barrel and a shitty old ply, drop your hopper onto the ply, bit of yakka to get it into the wheel barrel and then wheel it to your post hole. All in all, pretty good stuff mate. I just figured out im watching a kiwi and it makes me miss being on the tools again ;( ps. your order was spot on. the pumpee should have suggested that he empty his line out and hopper into the hole if he didnt already.
When I started I worked for free for 5 days. Then I asked how much I was worth. I held that job for 3 years. Learned from everyone. Then I renegotiated my pay. I have found that education is not free. You pay to go to school, or you pay on the job through lower wage, or longer time performing the job because your learning as you go - but it's never free.
been waiting for this one, love the weekly videos, teach how to a capenter :) i would love a really indepth video on house structures and carpentary techniques.
Runny concrete separates, course to bottom fines to top. Then the concrete strength is compromised. Recommended to remove extra water then concrete is true to plant slump test
Is there a reason you used square post instead of round is it because your building something above ground that’s easier to use the square posts with ? The only reason I ask is round posts are 5 times stronger then square so being a retaining wall they would be better maybe ?
Tony Pavko round posts are supposed to be up to five times stronger then square of the same size that’s why all telegraph poles are round as square can’t take as much sideways stress , also in Alaska when the build the cabins they will only build them on round posts and it was on a tv programme where they said that’s why because of the strength so just thought if that’s the case wouldn’t round posts have more strength for this project ?
Tony Pavko also round post have no inherent points that stress can concentrate unlike square which has 4 such points that concentrate stress , plus a round post has fewer disruptions to the grain then a milled post
That'll allow water to pool around the post and cause rot. If you see an earlier vid he drops a 'support' down the hole (a broken house brick will do) for the post to rest on and allow water to drain away.
Maybe the company didnt bring enough concrete. They may not have allowed for the amount that remains in the truck as im sure they cant get every last bit in there out
Youll find if you dont subtract you post volume and mot add for waist it turns out about the same. I've always been pretry spot on with concrete volumes. Next time you're doing a pour give me your hole sizes amd ill work out the perfect qty.
I don't know but I notice the tropical plants so maybe it's because they aren't in freezing temps? I'm in Virginia in the US and do use tubes that result in smooth sides, minimizing the grip for frozen soil to heave the post. Another difference is my area calls for pouring a base that is wider than the column. Again, to minimize the chance of heaving.
Don't under estimate how much variation from the concrete suppliers too. It's measured by weight which means that additional water (think a sloppy mix for pumping) will change the wet density and then the calculated volume by mass. I had a pretty decent argument with my concrete guy about this as I was filling 1m3 forms so knew exactly how much I needed per form and under supplied by 30%. I told them I don't care about the density difference as they sell it per m3 so if I order 4m3 I expect a minimum of 4m3.
Wow Scott! I don’t know how they taught you in NZ, but in America, it’s pi times the radius squared, times the depth of the hole. I always get the exact right amount. Don’t subtract the post volume, and add only 10% waste. Been doing this almost 30 years now and haven’t screwed it up, yet.
Cheers, mate!
Through one of the main carpentry training organisations in new zealand, i was taught this method.
Always a pleasure watching the Casey Neistat of builders doing his thing! Almost therapeutic for some reason.
Wish the episodes were longer and per project.
Dont put him and casey in the same sentence. Totally offensive to scott
Did you ever think the concrete guys short changed you, your maths over estimated your volume substantially. You should have had plenty left over!
Ya live, ya learn. It's awesome that you can admit when you are wrong. Not many people can do that in this day and age, especially on social media.
Hi mate. 20 years exp in fencing in outback Queensland and a rule of thumb we used for ordering concrete for round holes was divide the square cube amount by 14 and x x 11. Add 10% and round up to next .2. Never ran out in 20 years and normally little wastage. Overall congrats on a great job 👍Cheers. Jack and Mandy from Mount Isa
Amazing to me that these uploads go live at 4:30am but im still awake to watch whenever i get the beautiful notification! Loved the video.
Maybe I missed something, but I'm surprised you came out short, because you calculated volume for a cuboid instead of a cylinder (square vs circular base), so your example calculation is off by 0.07 m3 more concrete (about 27% more concrete on every hole).
So either wastage was much higher than you estimated or there was other error I can't see.
@Mario bar10005 is correct. Scott calculated with only 13% waste (0,15/1,15) and got it about right. If he calculated in a more sensible way (with a circular base instead of a square one) he would have gotten even less concrete.
Maybe luck, but could also be standard procedure in the business to calculate this way cause it is actually easier (not have to use π....) and compensate it with less added waste. What do I know. A cuboid with a square base will always be 4/π bigger than a cylinder with the same diameter as the square side and same height.
Staffan Ek
Thank you for pointing out the math equation possibilities. A little more figuring goes into the ordering process than what I realized.
Scott- I love the spray paint fill to here lines takes the guesswork out. It reminds me of the markings on the German beer glasses.
Keep the videos coming! Great work!
Perhaps we can also add the assumption that if the hole was perfectly round all the way down, and that the post hole borer didn't take anything off the sides, the measuring would've been more accurate! :-)
But yes, there was a LOT of waste!
@R-77 Volume of a cylinder is its base area (Area of a circle=radius*radius*π) multiplied with its height.
I wonder why he did not go with V = πr2h on the holes as well
My concrete pump guy suggest all holes size add 30-50mm to the hole size. When the digger pulls the auger out off the holes, it creates the holes bigger. Small jobs will not be a problem, but at a job, I ordered 18.5m and it used 24m at the end. The 50mm extra dimension makes a huge difference. It works every time. Good video! Well done!👍
Hey Scott man I’m 13 and from Australia SA, keep up the great content and I love your style your so good at carpentry and it inspires me to get some sort trade.ps I want to eat chef paerous food I’m sorry if I spelt that wrong haha
Throw in some old pieces of concrete or bricks to bring the concrete level up a bit.
The Chef would have said, "Bro, recken we are a bit tight on the concrete, ya, bro?...but she be right, bro...all good." Great vid man.
I've found concrete plants get quantities wrong, won't mention any names, one year we were short by a whole truckload, according to the supplier, but the thing was our slab, even though it was a random shape it was consistently built and the volume was calculated from the 3d drawing, so to say we were a truck short didn't stack up. Also a year later same company, we were about half a meter short on a not very big pour, really simple to measure when it's an oblong. The truck driver got angry when he was sent back to top it up. the truck drivers were doing the batching themselves, found out through a workmate on another job same truck driver was short for them, and again simple oblong shapes, always adding a wastage percent too. But on a POSITIVE :) we always have a competition who can guess the amount the closest before its measured. Some just make a guess others use the "eyecrometer" to guess, always fun :) good work, the retaining wall mission is almost done huh?
Expected to see Pi in the calc somewhere. Radius squared x Pi x depth = volume of cylindrical hole. Pi is approx 3.142 😮
He was counting base as a square, he was on a safe side so he didnt make mistake.
Hi Scott love the videos. In England we have lorries that mix the concrete on site so you only pay for what you use. Very handy when it’s difficult to add up volumes. Not sure if you have them in New Zealand but I’d highly recommend
One of the reasons why I’m leaving my architecture job and joining the trade! Thanks, Scott (and Paeru)!
Why would you do that?!
@@JakeBM4 because architects dont know how stuff ends up going in the field.
smokingcheeba420 that’s exactly right. I don’t want to keep acting like I know what I’m doing. I’d rather be the one to go out and figure out and then do it myself. I don’t mind giving up that design process.
A job well done SBC.
Not sure if anyone has mentioned this but when using a concrete pump allow at least 1/3 M3 of concrete on top of you calculation (including waste) as the pump can hold that and will clean that out later.
I've always wondered how you figure out how much concrete you need. You explained it nice and clearly!
It's simple volume calculation... how have you survived this long 😂
Always add .6 for the pump!
Next time don't deduct the volume of the post. I never do and always have enough. Happy days
I think the problem was treating the concrete like it was GST - multiply by 1.15 :-).
Its the way I do it as well .... Not worth the headache of being short
He calculated for square holes when they're round. Should have concrete left over.
@@davesmith2233 I think he did multiply by 1.15 at 3:25 he talks about waste being 15%. He also talks about it at 6:39.
Not many people will pump the water in these day. Great Job Scott.
Yeah, usually the pumps don't live very long when pumping muddy water like this, I wonder if it got damaged.
sometimes the order will be short because the batching plant fklded up.
If there is two people on site get both to do calculations then compare ,its a double check using more labour but worth it.
I leaned along time ago to never subtract the post volume it generally evens itself out its such a hassle coming up short. Better to be over i always order .200 extra
Do the cover the concrete company bring the leftovers back for free?
when you calculated you used volume of a rectangle not a cylinder
On big jobs I’ve found it’s also very easy to over order concrete and get charged return fees
Using your paper example -
Pie (3.14) x radius of hole, squared x height
3.14 x 0.04 x 2 = .25
.25 - 0.4 (post volume) = .21 conc per whole
You'll find that 400mm drilled holes will ream out to 430/440mm. Also, you can get the concrete pump guys to "blow out" there pump line on the ground near the holes. You can use that concrete to top the holes up, but you get left with a little bit of a mess. Or order extra to allow for the pump.
Usually have to add .4 when using a pump to prime the line
I probably wouldn’t have removed the volume for the posts. In bigger concrete pumps we calculate a single yard of concrete to prime the pump. My estimation of a yd to m3 is .8. Edit I did the math and a cubic yard is .763 m3
Thats how i do it !! i dont subtract the volume of the posts or whatever will be put into the holes !!
Watching you do the concrete calcs and there i was sitting on my dining chair screaming "NOOOOOOOOOOO MATE!!!! DON'T DO IT!"
Nice one Scott! There’s a good app called QuickChippy that is great for working out concrete quantities and lots of other building calculations that I use. I generally find its spot on for concrete quantities.
How much is it?
Usually theres about a 100 litres left in the hopper that the pump wagon cant pump. We usually empty the hopper into a mixing bath and the bucket it out.
Circles are always 21,5% less than a square given the same width so Im surprised it wasnt enough concrete 🤔
Those augers are notorious for over-boring the hole. Also if you have saturated clay, you can get big chunks that just fall in from further up the the hole. Both reasons mean the volume consumed is bigger than you expect.
There is little difference amd what there is different makes up for waist
@@RangieNZ well, as long as those chunks fall into the hole, the volume stays the same? It wasnt removed, and I guess you should measure the actual hole width and not the boring equipment
@@Pontus95 the chunks often fall off when boring, so they end up being removed and the volume does increase.
@@RangieNZ ah, didnt think about that
I work with laying concrete (floors mainly) in norway.. for 3 years now..
on 32-36 meter pumps we add 0.5m3 waste and 40-42 meter pumps we add 0.7m3 waste..
+ And do not remove the volume of the logs, it is always better and have a little too much concrete, instead of a little too little concrete.
I love the bright colour of the concrete truck
also you forgot to link this video in the end frames of retaining wall part 2! when I went straight to part 3, i was devastated to have missed the pour.
As always a great and enjoyable video! Is there not an concrete strength issue because there is no plastic lining (for instance) between the dirt and the poured concrete? Here in NL it is always good practice because the wet season makes the concrete to wet and dry season to dry. And doesn’t the concrete crack under the tension of the wood wet/dry contractions? Here it does with that size of pine timber posts but for fences and other esthetic structures that does not matter much.
I always order a yard extra. That expense is nothing compared to being a wheelbarrow short. There is no doubt in my mind, the yard has shorted me. Just part of the job.
awesome job man. concrete guys seem to be cranky no matter what continent haha. who are you cheering for the super rugby playoffs?. take care. pete. if it sounds like bossa nova it might well be. beautiful music
Scott, i think the calc should be, and sorry i dont know all the correct words so ill try. (Diameter/2) * (diameter/2)* pie (pie is something like 3.14)* total length of column. This will calc the total volume of the column. Then just deduct the volume of the post. Hope this helps. ( should prob still round up the total since this is just math and not building :) )
Love the content by the way! Keep it up! Cheers from the Netherlands :)
xl3real 3.14 x radius^2 x depth are the words your looking for,!
Thanks for uploading, you could have easily not done that but you owned up to your mistake! A true lad! Thanks man, appreciate it.
great video Scott i always wondered how people measured the concrete
Don’t deduct the post volume, if you have a bit extra you just dump it over the fence and it magically becomes the neighproblem.
Nice Brazilian song! Cheers from Brazil mate! 🇧🇷🇧🇷🇧🇷
Cheers for the vid Scott. Always enjoy watching you. However, in fact you would've been even shorter on concrete if you did correct calculations. =) Basically in your calculations you assumed that holes are square but they are rather circular. So the correct formula is actually: Pi*r2*depth=3.1415*0.2*0.2*depth.
Just add all depth... Multiply by a hole surface... You got the total volume, then substract the length of post that will be in concrete multiplied by the post surface (of rhe small face)...
A quick FYI: phone calculators have BODMAS issues, they're a absolute nightmare if you do a single calculation then multiply it for multiple items. It cost my boss £4K not so long ago on a big window job, but it could just as easily have been a larger amount. A quick Google of "phone calculator wrong" and look at the side-by-side pics of folk doing sums on a phone and calculator at the same time and getting different results
I'm sure that's why we still get free calculators in little promo notebooks and folders that suppliers give away to us, I just assumed its because they got a bulk deal on them years ago before we all had smartphones, but new companies also give away stuff with them in too, maybe because they've delt with a few of us on the phone trying to understand why our order/quote went so wrong!
And Scott, if you read this yourself, its maybe worth dropping this little nugget of info into a video, save anyone else getting bitten the way my boss was! 👀😳
those calculations brought out the Scottish in you.
Always more concrete for holes the hole sometimes caves in as you’re drilling them ie rocks heavy clay which requires more concrete to fill them also it Takes about a half a yard to prime the concrete pump which you don’t get back
Nice to see you are protecting our bee population.
It’s definitely a good way to do it but if I were to do it I could have calculated it using the cylinder formula using pi, and then subtracting the volume of the post. Then just add them all up
Could I please ask Scott why are there so many hedchogs in the post holes you dig?
Hedgehogs are nocturnal and fall down the holes while searching for food etc, very common in NZ
Where did you see hedgehogs?
We have to and in an additional 1/2 yard for the pump hopper in the US.
Working with concrete is a hard job. I used to be a proffesional gardener and we build a lot of swimmingpools. For that we have to work a lot with concrete.
the hopper and the actual line takes a fair bit of concrete especially if its a long line, should have gotten a wheel barrel and a shitty old ply, drop your hopper onto the ply, bit of yakka to get it into the wheel barrel and then wheel it to your post hole.
All in all, pretty good stuff mate. I just figured out im watching a kiwi and it makes me miss being on the tools again ;(
ps. your order was spot on. the pumpee should have suggested that he empty his line out and hopper into the hole if he didnt already.
Love this Chanel. Keep up the great work
Volume of a circular tube formula is s x s x pie x hight and s = half diameter
hi Scott, can you please make a video on carpentry apprenticeships and how to make yourself more employable
When I started I worked for free for 5 days. Then I asked how much I was worth. I held that job for 3 years. Learned from everyone. Then I renegotiated my pay.
I have found that education is not free. You pay to go to school, or you pay on the job through lower wage, or longer time performing the job because your learning as you go - but it's never free.
Riviting stuff. Don't forget the Pie. Love the Bees 🐝.
Hi Scott the quantities were right so don't worry you just forgot the wheelbarrow......lol
I usually just don't subtract the posts. Then don't allow any waste. Way easier
I love to Brazilian song that was playing on the video 👍👍👏🇧🇷
Hey Scott great video keep it up
Don't you just love waiting for concrete trucks.
I enjoy all your videos. One question, did I miss your plans for the layout?
Great vid
Bravo Scott 👍👍👍👍👍 👍👍👍👍
been waiting for this one, love the weekly videos, teach how to a capenter :) i would love a really indepth video on house structures and carpentary techniques.
nicely done !
Good advice.
so you pretty much come up one barrow short for a post hole....bang on if you ask me
the water in the bottom shouldn't matter much, it gets forced to the top anyway. Any reason why the timber isn't a little more protected?
Runny concrete separates, course to bottom fines to top. Then the concrete strength is compromised. Recommended to remove extra water then concrete is true to plant slump test
Do you have concrete trucks with booms in NZ?
In the design and build; what is the expected lifetime of the retaining-wall?
Treated pine should last decades, but most retaining walls fail prematurely because they dont have proper drainage behind them.
Better to be looking at it then looking for it…..👍
Nice Brazilian music on the background.
What's the brand of that pump your using?
It’s always the last few inches that count!
Did it fall down?
I'm confused as to how you even got close without using pi
Just wack some postcrete down there
If you’re not sure when u order you can say .4 cube+ balance...
Is there a reason you used square post instead of round is it because your building something above ground that’s easier to use the square posts with ? The only reason I ask is round posts are 5 times stronger then square so being a retaining wall they would be better maybe ?
How are round posts 5 times stronger. It all depends on sectional size
Tony Pavko round posts are supposed to be up to five times stronger then square of the same size that’s why all telegraph poles are round as square can’t take as much sideways stress , also in Alaska when the build the cabins they will only build them on round posts and it was on a tv programme where they said that’s why because of the strength so just thought if that’s the case wouldn’t round posts have more strength for this project ?
Tony Pavko also round post have no inherent points that stress can concentrate unlike square which has 4 such points that concentrate stress , plus a round post has fewer disruptions to the grain then a milled post
@@craigh9112 I don't know who taught you but you are defying material science
Do you not need to put plastic around the posts where its submerged in concrete?
That'll allow water to pool around the post and cause rot. If you see an earlier vid he drops a 'support' down the hole (a broken house brick will do) for the post to rest on and allow water to drain away.
Where was the 3,14 in that calculation?
Yeah just don't subtract the post volume from the total and you'll be fine. Add 15% on top of your total. Happy days
Better lookin at it than lookin for it
It looks to me either the holes are too big for the posts or the other way around
Just for any Canadians and Americans watching, this is in the middle of winter!
I dig it.........I mean I didn’t actually dig it, I just like the video........🤦🏽♂️ Good job
Maybe the company didnt bring enough concrete. They may not have allowed for the amount that remains in the truck as im sure they cant get every last bit in there out
Yeah its pretty sticky stuff aye
I would have just used the calculators on the blocklayer website, myself.
didn't they teach ya how to work out the area of a circle?
Youll find if you dont subtract you post volume and mot add for waist it turns out about the same. I've always been pretry spot on with concrete volumes. Next time you're doing a pour give me your hole sizes amd ill work out the perfect qty.
great vid. ha l found the song. its saib - brazil.. yay for me.
volume of a cylinder is πr2h = π * 0.4 * 0.4 * 2 = 1.00531m3 - you forgot pi!
4:00 Brazilian music, Joao Gilberto - Aquarela do brasil. Vai brazilllll !!!!
Does anyone know why they don't use Sonotubes forms? In the US people would lose their minds over doing this way. Just wondering.
I don't know but I notice the tropical plants so maybe it's because they aren't in freezing temps? I'm in Virginia in the US and do use tubes that result in smooth sides, minimizing the grip for frozen soil to heave the post. Another difference is my area calls for pouring a base that is wider than the column. Again, to minimize the chance of heaving.
Yo yo yo...another one !!!!!
Cylinder voloum =πr2h.
I was waiting for him to add waste to his calculations
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