The formula for the volume of a tube is....

[Mandelon]

what?
Pi r squared or 2 pi R??? times length???
Come on impress your friends and answer this while i do an internet search.....:D

[572Daytona]

I would say pi r squared * length since a tube is basically a bunch of circles on top of each other

[Mandelon]

I found this : Cylinder Volume =PI*radius^2
but what about length?? multiply the total?

[Mandelon]

And yes I know that pie aren't square, pie are round. :D

[572Daytona]

yes the area of the base (pi r^2) * height (or length)

[Mandelon]

I have three 24" tubes to fill with concrete, they are 10 feet tall.
So 3.1416 *12"*(12) *120" ?? then divide back into feet or it
should be same as 3.1416 *1*(1) X 10 ??

[Kilrtoy]

Who cares:confused: ;) :confused: :confused: :confused:

[Mandelon]

I'd like to order the right amount of concrete...so I care and so would the customer, the concrete company, the pump guy and probably the neighbors......
I get 31.41 cubic feet per tube, or 1.163 cu yds per tube. That sounds about right. What do ya think??

[572Daytona]

Either way gets the same answer
3.1416*12*12*120 = 54286.848cu in / 1728 = 31.416 cu ft
3.1416*1*1*10 = 31.416 cu ft

[hoolign]

once you have that figured out, who can figure out he displacement of the tube as it is submerged in fluid, or the bouyancy factor at say..36 feet into an outer tube containing fresh water?

[Mandelon]

572 = :cool:
Hoolign = :rolleyes: :confused:
Kilrtoy = :yuk: :p

[Kilrtoy]

I would care then also

[Mandelon]

Originally posted by hoolign
once you have that figured out, who can figure out he displacement of the tube as it is submerged in fluid, or the bouyancy factor at say..36 feet into an outer tube containing fresh water?
Wouldn't the displacement be the interior volume plus the thickness of the tube material itself.....
Buoyancy.....Uh.....I dunno. :rolleyes:

[572Daytona]

Here's a handy dandy Bob Villa calculator for concrete columns. It got the same result as we did:
http://www.bobvila.com/DesignTools/Calculators/concreteColumn.html

[hoolign]

Originally posted by Mandelon
Wouldn't the displacement be the interior volume plus the thickness of the tube material itself.....
Buoyancy.....Uh.....I dunno. :rolleyes:
actually since i'm in canada I would need the weight ( kg/m) of the tube times .0001234, that would get the m3/m displacement:p being as the tube is open ended
as for the bouyancy, od squared -id squared, times .7854 times the hydrostatic pressure , would give approximate bouyancy factor:p

[Kachina26]

Tell em to keep pump mud 'til it's full. If you have any left, tell him where to put it;)

[boxscore]

Originally posted by Mandelon
I have three 24" tubes to fill with concrete, they are 10 feet tall.
So 3.1416 *12"*(12) *120" ?? then divide back into feet or it
should be same as 3.1416 *1*(1) X 10 ??
Mandelon , are you affiliated with the Mob?... Scott Peterson? Who's goin' down? Ya know, in this period of severe drought... that pond might dry up, then what?

[boxscore]

Originally posted by Mandelon
I have three 24" tubes to fill with concrete, they are 10 feet tall.
So 3.1416 *12"*(12) *120" ?? then divide back into feet or it
should be same as 3.1416 *1*(1) X 10 ??
Mandelon , are you affiliated with the Mob?... Scott Peterson? Who's goin' down? Ya know, in this period of servere drought... that pond might dry up, then what?

[Scream]

Originally posted by Kilrtoy
Who cares:confused: ;) :confused: :confused: :confused:
Damn I almost said it first.
Basically they're about 3 quarters worth at the local Arco...

[dicudmore]

Originally posted by Kachina26
Tell em to keep pump mud 'til it's full. If you have any left, tell him where to put it;)
thats how we did my yard.....4 trucks worth.
keep filling that wall, that trucks not empty. to hell with that every other column dealio

[dicudmore]

Originally posted by Scream
Damn I almost said it first.
Basically they're about 3 quarters worth at the local Arco...
I got an inflater you plug in the lighter of the boat FREE if'n you want to be borrowing it this weekend :D

[Mandelon]

Originally posted by boxscore
Mandelon , are you affiliated with the Mob?... Scott Peterson? Who's goin' down? Ya know, in this period of servere drought... that pond might dry up, then what?
Nobody has asked me where Jimmy Hoffa is.......... yet.......that guy was big, it took 5 yards....
:D

[ROZ]

If you look for the volume of a cylinder, you may find it a litle quicker :D

[Tom Brown]

Originally posted by hoolign
...the weight ( kg/m) of the tube times .0001234, that would get the m3/m displacement:p being as the tube is open ended
as for the bouyancy, od squared -id squared, times .7854 times the hydrostatic pressure , would give approximate bouyancy factor:p
Just as I thought. You're drunk.

[sorry dog]

1ft (12")*3.142*10 = 31.42 CF * 3 = 94.26 total CF
Give yourself 5% waste or truck shortage
94.26 * 1.05 = 99 / 27 = 3.7CY
Round up and order 4CY unless your pumping because a yard or two stays in the truck.
Hey 572 - does Bob Vila have any fiberglass repair tips?

[Infomaniac]

Diameter squared X 1/4 pi X length

[Desert Rat]

Try here
Concrete Calculators (http://www.graniterock.com/calcconc.html)

[Stupid Fast]

You need one of these:
I use mine every day.Constuction master (http://www.calculated.com/products/4045.html?construction)
I think they have one for just about any thing you do....

[OGShocker]

Originally posted by sorry dog
Hey 572 - does Bob Vila have any fiberglass repair tips?
LMAO..