I want to pour a 4 x 8 slab four inches thick at the entrance to a garden shed.Will someone please tell me how many 80lb sacks of concrete I will need? Thanks for any reply

|I want to pour a 4 x 8 slab four inches thick at the entrance to a garden
shed.Will someone please tell me how many 80lb sacks of concrete I will
need?


I think it's something like 2/3 cubic foot per bag,
but it's on the bag. you can just check when you
buy it.

"herb white" wrote in message
...
I want to pour a 4 x 8 slab four inches thick at the entrance to a garden
shed.Will someone please tell me how many 80lb sacks of concrete I will
need? Thanks for any reply

You can calculate it here.

http://www.concretenetwork.com/concr...calculator.htm

About 18 of the 80 lb bags. Plan on an hour or two to mix it up as once you
start, you will need to finish the job.
I am sure you are planning on putting in some rebar or wire to help hold it
together.

herb white wrote:
I want to pour a 4 x 8 slab four inches thick at the entrance to a
garden shed.Will someone please tell me how many 80lb sacks of
concrete I will need? Thanks for any reply

Look in the yellow pages for a you-haul-it concrete outlet . Beats the hell
outta mixing that much concrete if you're doing it by hand . And you need 4'
x 8' x 1/3' divided by 27 = .391 cubic yards - less than a half a yard but
you'll probably have to buy a half .

--
Snag

"Terry Coombs" wrote in message
...

Look in the yellow pages for a you-haul-it concrete outlet . Beats the
hell outta mixing that much concrete if you're doing it by hand . And you
need 4' x 8' x 1/3' divided by 27 = .391 cubic yards - less than a half a
yard but you'll probably have to buy a half .


He is also looking at about 1500 lb of dry mix in the bags. I needed about
a yard of concreter for an antenna tower base. I used about 45 of the 80 lb
bags for that. Rented a small mixer for about $ 35 to mix it up in. Where
I wanted it was about 100 feet from where a truck could get and they want to
charge a lot for bring out a small batch. I did have 50 bags delivered for
a small extra charge. Total cost was about the same as for 3 or 4 yards
delivered by truck, but I only needed one. Took several hours to mix it all
up and just dump it in a hole.

If you can get 40 pound bags for close to the same price I recommend that as
the larger bags will wear you out.

Ralph Mowery wrote:

"Terry Coombs" wrote in message
...

Look in the yellow pages for a you-haul-it concrete outlet . Beats the
hell outta mixing that much concrete if you're doing it by hand . And you
need 4' x 8' x 1/3' divided by 27 = .391 cubic yards - less than a half a
yard but you'll probably have to buy a half .


He is also looking at about 1500 lb of dry mix in the bags. I needed about
a yard of concreter for an antenna tower base. I used about 45 of the 80 lb
bags for that. Rented a small mixer for about $ 35 to mix it up in. Where
I wanted it was about 100 feet from where a truck could get and they want to
charge a lot for bring out a small batch. I did have 50 bags delivered for
a small extra charge. Total cost was about the same as for 3 or 4 yards
delivered by truck, but I only needed one. Took several hours to mix it all
up and just dump it in a hole.

If you can get 40 pound bags for close to the same price I recommend that as
the larger bags will wear you out.


Hi, Ralph
Are you a HAM?

"Ralph Mowery" wrote in message
m...

"Terry Coombs" wrote in message
...

Look in the yellow pages for a you-haul-it concrete outlet . Beats the
hell outta mixing that much concrete if you're doing it by hand . And you
need 4' x 8' x 1/3' divided by 27 = .391 cubic yards - less than a half a
yard but you'll probably have to buy a half .


He is also looking at about 1500 lb of dry mix in the bags. I needed
about a yard of concreter for an antenna tower base. I used about 45 of
the 80 lb bags for that. Rented a small mixer for about $ 35 to mix it up
in. Where I wanted it was about 100 feet from where a truck could get and
they want to charge a lot for bring out a small batch. I did have 50 bags
delivered for a small extra charge. Total cost was about the same as for
3 or 4 yards delivered by truck, but I only needed one. Took several
hours to mix it all up and just dump it in a hole.

If you can get 40 pound bags for close to the same price I recommend that
as the larger bags will wear you out.


I have not seen 40 pound bags but I buy 60 pounds rather than 80 or 90
pounds, as they are easier to handle.

This reply was referring to a "haul it yourself" purchase, where they give
you a tilt hopper trailer for you to tow home. I don't know the pricing
these days, but cheaper than having a truck deliver, and easier than mixing
your own (depending on quantity and wheel barrow mileage). But if it is an
antenna raising party, you should have some help, eh?

On 06/26/2014 09:14 AM, Ralph Mowery wrote:

[snip]

You can calculate it here.

http://www.concretenetwork.com/concr...calculator.htm

Strangely, that calculator accepts negative dimensions. We now have
proof of the existence of anticoncrete.

[snip]

"Tony Hwang" wrote in message
...

Hi, Ralph
Are you a HAM?

Yes, you can look me up at qrz.com, Call of KU4PT.

I just have the top of the 60 foot tower with the antennas on it showing in
the pix.

I did all the work of putting up that tower myself except some people on the
ground with some ropes pulling the tower sections and antenna up.

4 feet X 8 feet X 1/3 of a foot = about 10 cubic feet.

On the bag it will tell you the yield per bag will be about a half cubic foot per bag, or something like that.

So, you're looking at about 20 bags.

I'd buy 25 just so that you have extra just in case you need more. You can always return the bags you don't open.

On Thu, 26 Jun 2014 06:54:22 -0700 (PDT), herb white
wrote:

I want to pour a 4 x 8 slab four inches thick at the entrance to a garden shed.Will someone please tell me how many 80lb sacks of concrete I will need? Thanks for any reply

Right about now you are probably wishing you paid attention in school,
huh? I would be so embarrassed if I couldn't solve a simple algebra
problem that a 7th or 8th grader would be able to.

On 06/26/2014 08:54 AM, herb white wrote:
I want to pour a 4 x 8 slab four inches thick at the entrance to a garden shed.Will someone please tell me how many 80lb sacks of concrete I will need? Thanks for any reply




I had a similar sized project but figured it would be a real PITA to lug
that many bags.

I found a "Metro Mini-Mix" that specializes in small batches and had
them pour me a yard of cement. It cost a little more than doing it
myself but it was a hell of a lot easier.

herb white wrote in
:

I want to pour a 4 x 8 slab four inches thick at the entrance to a
garden shed.Will someone please tell me how many 80lb sacks of
concrete I will need? Thanks for any reply

http://www.sakrete.com/products/calculators.cfm

It will tell you the number of bags based on the bag size you are getting.

nestork wrote in
:


Mayayana;3252664 Wrote:
|I want to pour a 4 x 8 slab four inches thick at the entrance to a
garden
shed.Will someone please tell me how many 80lb sacks of concrete I will

need?-
-

I think it's something like 2/3 cubic foot per bag,
but it's on the bag. you can just check when you
buy it.

4 feet X 8 feet X 1/3 of a foot = about 10 cubic feet.

Closer to 11: 32/3 = 10 2/3

On the bag it will tell you the yield per bag will be about a half cubic
foot per bag, or something like that.

2/3 cubic feet per bag

So, you're looking at about 20 bags.

32/3 cf / 2/3 cf per bag = 16 bags

I'd buy 25 just so that you have extra just in case you need more. You
can always return the bags you don't open.

If he follows your advice, he's going to be returning at least a quarter ton of concrete.

Ralph Mowery wrote:
"Tony Hwang" wrote in message
...

Hi, Ralph
Are you a HAM?

Yes, you can look me up at qrz.com, Call of KU4PT.

I just have the top of the 60 foot tower with the antennas on it showing in
the pix.

I did all the work of putting up that tower myself except some people on the
ground with some ropes pulling the tower sections and antenna up.


Hi,
My call is VE6CGX, old call is HM1AY. Remind me of Gin pole. My
neighborhood restricts antenna height and such a hassle to have a decent
tower. Just getting by with multi band vertical. Still CW is
my main mode. I love QRP brick radio, QRP Plus.

Doug Miller wrote:

|I want to pour a 4 x 8 slab four inches thick at the entrance
to a garden shed.

So, you're looking at about 20 bags.

32/3 cf / 2/3 cf per bag = 16 bags

In every CF of concrete there will be anywhere from 5.5 to 8.5 lbs of
water (2/3 to 1 gallon of water).

The slab in question will need 10.66 CF or about 1480 lbs of dry
incredients. This would be 16 bags if each bag weighed 92.5 lbs.

I question the need for a 4" slab. The slab could easily be 3" or even
2.5" if the slab will never be exposed to vehicular weight.

Anyone in a position to transport and mix 1500 lbs of concrete could
probably just as easily obtain bulk sand, stone and cement and mix them
together during batching. The cost savings would be significant, as
pre-mixed bagged concrete is much more expensive than buying bulk sand
and stone from a quarry or landscape materials retailer.

Your average small mixer (3 cf drum) can mix about 200 lbs worth of wet
concrete per batch (about 1.35 cf) and if you get really good at it you
can mix and pour a batch in about 20 minutes if you have all incredients
lined up in buckets ready to dump into the mixer. A 4" slab would
require about 7.75 batches and take about 2.5 hours to mix and place at
minimum with 2 people using a small 3-cf drum mixer.

On Thursday, June 26, 2014 9:54:22 AM UTC-4, herb white wrote:
I want to pour a 4 x 8 slab four inches thick at the entrance to a garden shed.Will someone please tell me how many 80lb sacks of concrete I will need? Thanks for any reply

your far better off getting your concrete delivered in a mix truck.

price it both ways, bags are expensive. although get a couple helpers for finishing

"bob haller" wrote in message
...
On Thursday, June 26, 2014 9:54:22 AM UTC-4, herb white wrote:
I want to pour a 4 x 8 slab four inches thick at the entrance to a
garden shed.Will someone please tell me how many 80lb sacks of concrete I
will need? Thanks for any reply

your far better off getting your concrete delivered in a mix truck.

price it both ways, bags are expensive. although get a couple helpers for
finishing

He needs less than 1 yard. Around here they want to charge a minimum of a
price of about 3 or 4 yards even if you need less.

For me several years back it would have cost about as much for one yard
either way, bags or truck delivered. I just could not get a truck where I
wanted it and did not want to do the wheelborrow thing.

"Ralph Mowery" wrote in message

stuff snipped

He needs less than 1 yard. Around here they want to charge a minimum of a
price of about 3 or 4 yards even if you need less.

That's when you start looking around to see if there's anywhere else you can
use some concrete. I had the same problem with pea stone. Minimum truck
quantity was way more than I needed but using bags of stone was really a lot
more expensive per pound of stone. If I had it to do again, I would have
found some other use for the excess delivered pea stone.

For me several years back it would have cost about as much for one yard
either way, bags or truck delivered. I just could not get a truck where I
wanted it and did not want to do the wheelborrow thing.

That makes sense. It's a tough tradeoff, though. Having done it, I
wouldn't want to jackass so many bags again. A lot depends on the locale,
though. I called a lot of places and there was a substantial difference in
the end price depending on the vendor.

How long ago was this? Nowadays they have these huge concrete pumper trucks
that can get concrete a long ways onto your property without having to drive
onto it (which a lot of them won't do because of the damage potential).
Clearly that "last 100 feet" problem is a big issue for people doing small
projects that want to use a commercial service.

I wonder if you can arrange a cheaper price if you're willing to have them
deliver it whenever it's convenient for them? There must be times where
they have to dump unused concrete before it hardens and they might as well
make some $ for it.

--
Bobby G.

"Robert Green" wrote in message
...
That makes sense. It's a tough tradeoff, though. Having done it, I
wouldn't want to jackass so many bags again. A lot depends on the locale,
though. I called a lot of places and there was a substantial difference
in
the end price depending on the vendor.

How long ago was this? Nowadays they have these huge concrete pumper
trucks
that can get concrete a long ways onto your property without having to
drive
onto it (which a lot of them won't do because of the damage potential).
Clearly that "last 100 feet" problem is a big issue for people doing small
projects that want to use a commercial service.

I wonder if you can arrange a cheaper price if you're willing to have them
deliver it whenever it's convenient for them? There must be times where
they have to dump unused concrete before it hardens and they might as well
make some $ for it.


When I needed the concrete it was about 10 years ago. I am sure they had
the pumper trucks then,but they would have needed to pump it about 200 feet.
More in the pipe than I would have used.

The rocks that would have been excess to the needs could be piled up
somewhere and saved, concrete won't save.

Sometimes it is a trade off for what you want , what you can get and if you
have a place for the excess.

"Ralph Mowery" wrote in message
"Robert Green" wrote in message

stuff snipped

How long ago was this? Nowadays they have these huge concrete pumper
trucks that can get concrete a long ways onto your property without
having to
drive onto it (which a lot of them won't do because of the damage
potential).
Clearly that "last 100 feet" problem is a big issue for people doing
small
projects that want to use a commercial service.

I wonder if you can arrange a cheaper price if you're willing to have
them
deliver it whenever it's convenient for them? There must be times where
they have to dump unused concrete before it hardens and they might as
well
make some $ for it.


When I needed the concrete it was about 10 years ago. I am sure they had
the pumper trucks then,but they would have needed to pump it about 200
feet.
More in the pipe than I would have used.

The rocks that would have been excess to the needs could be piled up
somewhere and saved, concrete won't save.

Good point. In my case I have some cracked slabs that I could have prepped
to deal with the excess and could have even bit the bullet and poured a pad
for a new Generac. I share a free-standing generator with my neighbor just
to power my refrigerator but during the last major power outtage we were
both outside trying to get the generator starting and all the extension
cords plugged in while standing in cold rain that was blowing sideways in a
very strong wind. Unfortunately both our houses have no free slots on the
circuit panel to arrange for a transfer switch and installing one would be
incredibly expensive because we would have to upgrade the circuit breaker
panels.

Sometimes it is a trade off for what you want , what you can get and if
you
have a place for the excess.

I talked to my neighbor's sister tonight. She works for a concrete supplier
and talked about they now have motorized carts that can hold up to 2 cubic
yards of concrete (she used an industry term for them that sounded like a
girl's name (Jenny?) but I had a drink at dinner and that clouds my mind
these days. )-:

She said they also have much smaller pumps that can sit in the driveway and
move the concrete (a special mix, apparently with very small peastone
aggregate to make pumping easier and allow for the use of much smaller
diameter pump hoses.

She took one look at all the low hanging phone and electrical wires in our
neighborhood and said the company wouldn't send a pumper truck because they
are huge and tend to catch sagging wires. Same with not going over kerbs
because they often break under the heavy load.

I forgot to ask about whether they'd cut a deal if deliver was flexible and
they had some concrete left over in the truck that was going to be wasted
anyway. Maybe next time I see her I'll remember.

What I found most interesting was how she spoke. She kept saying "your
contractor will know what's best . . . your contractor will decide this,
etc." It's clear they don't like dealing directly with homeowners who may
not know a lot about what they are doing. She did confirm my suspicion that
with a project using 20 or more big bags, there are often issues with batch
consistency and spalling can become an issue.

Her opinion (and her company did an excellent job with my neighbor's
driveway, FWIW) was that if you're doing the work yourself, your time is
best spent smoothing and leveling the concrete you got from a truck. That's
simply because by the time you get all that stuff mixed, you'll probably be
too tired to put a lot of effort into finishing it off correctly.
Considering how tired I get just *thinking* of jackassing 20 plus bags of
concrete around, I am tempted to agree.

--
Bobby G.

"Robert Green" wrote in message
...

What I found most interesting was how she spoke. She kept saying "your
contractor will know what's best . . . your contractor will decide this,
etc." It's clear they don't like dealing directly with homeowners who may
not know a lot about what they are doing. She did confirm my suspicion
that
with a project using 20 or more big bags, there are often issues with
batch
consistency and spalling can become an issue.


Several years ago when the economy was doing well a fellow at work needed 3
or 4 yards and one company he contacted said they could not sell him any at
the time as it was is somewhat of a short supply and they were servicing
their regular contractors first. He did find another place that was about 5
% higher that delivered to him.