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Old 04-06-2013, 01:39 PM   #1
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Anyone know how much quickcrete it would take to secure a 4x4x6 beam upwards?


If you fill enough space with quickcrete, and then set a 4x4 in its middle, at some point some amount of concrete will ensure that post is not going to move at all.

Does anyone have any idea how much quickcrete and at what dimensions I would need to do just that...I want that 4x4 stiff as an iron pole. If burying the post, they say 1/3-1/2 size of the pole, but I cant bury this thing.
Im thinking large trash bin would hold enough quickcrete to do what I need.

Im not made of money so moderate cost options please.
And please explain how you came up with your calculation.

thank you for any thoughtful posts

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Old 04-06-2013, 01:44 PM   #2
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Anyone know how much quickcrete it would take to secure a 4x4x6 beam upwards?


How about you tell us exactly what it really is your trying to do.
Why can it not be set in a hole?
A trash can full of concrete is sure not going to be as strong as iron.
One push and it will topple over.

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Old 04-06-2013, 02:48 PM   #3
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Anyone know how much quickcrete it would take to secure a 4x4x6 beam upwards?


I think I told you exactly what I was trying to do.
At what point would a squared section of quickcrete not give, if there was a 4x4 beam in the center of it?

At a certain point the strength of the concret would be too strong and able to endure any move and couldnt be pushed over.

thats what Im looking for.
Size and weight.
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Old 04-06-2013, 03:37 PM   #4
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Anyone know how much quickcrete it would take to secure a 4x4x6 beam upwards?


The wider and deeper the chunk of concrete, the more stability

A big chunk of concrete sitting on the ground will not do much if it "pole" is long. Put it in the ground, you gain stability and it CAN be there long after the 4x4 breaks.

If you were lucky enough to auger or use a post hole digger, you would use less concrete and be much stronger.

Hopefully, you do not have a blimp attached to a 20' 4x4, but that seems to be the tightly held secret.

Dick
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Old 04-06-2013, 03:49 PM   #5
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Anyone know how much quickcrete it would take to secure a 4x4x6 beam upwards?


Wider is more important than deeper. If the post is only 6 feet long, a 3 foot diameter disk about a foot thick should make the pole pretty darn stable.
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Old 04-06-2013, 04:03 PM   #6
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Anyone know how much quickcrete it would take to secure a 4x4x6 beam upwards?


Quote:
Originally Posted by jratftcc View Post
At a certain point the strength of the concret would be too strong and able to endure any move and couldnt be pushed over.

thats what Im looking for.
Size and weight.
sometimes what we are looking for is not what we find ..... how we respond to questions asked by forum members trying to help can give you direct or indirect replies.

a 4x4 post placed in concrete will act as a lever. the force applied at the end of the post x the length of the post is the force acting at the bottom of the post. so the actual force is based upon lateral load applied to the post and the length of the post.

depending on the force at the base either the base will move or not. you can increase the lateral load or lengthen the post to increase the force on the base until either the base moves or the post exceeds it shear limits and breaks. you do not state if the 4x4 is wood (or grade & species) or if tubular steel.

resistance in a hole is determined by the soil type and compaction of the soil. glacial tilt with cobbles and fines typically will resist more lateral load than organic soils such as muck. The depth of the hole also factors into the question.

so you have not provided the necessary information for your question to be answered even though you thought you had exactly done so.

again, what is it you are attempting to do??

Good luck!
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Old 04-06-2013, 04:25 PM   #7
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Anyone know how much quickcrete it would take to secure a 4x4x6 beam upwards?


Quote:
Originally Posted by jagans View Post
Wider is more important than deeper. If the post is only 6 feet long, a 3 foot diameter disk about a foot thick should make the pole pretty darn stable.
Hugh? Try meeting code with that argument.
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Old 04-06-2013, 04:31 PM   #8
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Anyone know how much quickcrete it would take to secure a 4x4x6 beam upwards?


Quote:
Originally Posted by jratftcc View Post
If you fill enough space with quickcrete, and then set a 4x4 in its middle, at some point some amount of concrete will ensure that post is not going to move at all.

Does anyone have any idea how much quickcrete and at what dimensions I would need to do just that...I want that 4x4 stiff as an iron pole. If burying the post, they say 1/3-1/2 size of the pole, but I cant bury this thing.
Im thinking large trash bin would hold enough quickcrete to do what I need.

Im not made of money so moderate cost options please.
And please explain how you came up with your calculation.

thank you for any thoughtful posts
A sanitube concrete casting sleeve would not wobble like a thin plastic trash can would if you are intent on casting whatever this is yourself.

I join with others in suggesting I have no idea what your asking though. What are you trying to do? A chunk of concrete holding a post is going to slide, maybe with the lateral force of the floor under it (constantly in motion) or because of live loads just to start on the whole thing your are building.

Some reason a steel plate anchored to what floor you have would not work? Why can't you dig for a real concrete footing if that is what you need here.

Last edited by user1007; 04-06-2013 at 04:35 PM.
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Old 04-06-2013, 04:32 PM   #9
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Anyone know how much quickcrete it would take to secure a 4x4x6 beam upwards?


Quote:
Originally Posted by sdsester View Post
Hugh? Try meeting code with that argument.
Sorry, its the best I could do with the information provided, its called a WAG, or a DasAboutRite.

No have applied loads, No can do math, Like Gary Says. You cant make tomato sauce without tomatoes. Its like chicken beak soup, kind of thin.
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Old 04-06-2013, 04:43 PM   #10
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Anyone know how much quickcrete it would take to secure a 4x4x6 beam upwards?


Quote:
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Its like chicken beak soup, kind of thin.
my mama always used beaks and feet even though I preferred breasts and thighs ...
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Old 04-06-2013, 05:45 PM   #11
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Anyone know how much quickcrete it would take to secure a 4x4x6 beam upwards?


Quote:
Originally Posted by jagans View Post
Sorry, its the best I could do with the information provided, its called a WAG, or a DasAboutRite.

No have applied loads, No can do math, Like Gary Says. You cant make tomato sauce without tomatoes. Its like chicken beak soup, kind of thin.
You rooftop guys think you can live up their in the clouds, with a bumblshoot, and not worry about anything structural under you.
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Old 04-07-2013, 10:47 AM   #12
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Anyone know how much quickcrete it would take to secure a 4x4x6 beam upwards?


What are you building? You asked information to anchor a post, then a pole, then a beam.
For a fence post, 1 1/2 bags of Quickcrete for a 12" diameter hole, 30" deep, 5' high fence, 4x4 treated.
For a cloths-line pole, 4 bags of Quickcete for a 16" to 20" diameter hole' 36"+ deep, 12' high 4x4" pole.
For a BEAM, depends on what it's carrying or if its cantilevered.
Are you planning to use the garbage can as a form for the concrete?
Are you planning to anchor the post/pole/beam in the ground?
Tether ball?
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Old 04-07-2013, 10:53 AM   #13
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Anyone know how much quickcrete it would take to secure a 4x4x6 beam upwards?


seems like a swing in the making?? is there a tree nearby to hang the swing from instead?
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Old 04-07-2013, 11:01 AM   #14
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Anyone know how much quickcrete it would take to secure a 4x4x6 beam upwards?


Quote:
Originally Posted by hand drive
seems like a swing in the making?? is there a tree nearby to hang the swing from instead?
Lol.
Nooooo. I think it's a mobile cloths-line pole. Add some wheels to the sides of the can cause this baby's gonna be heavy.
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Old 04-07-2013, 11:20 AM   #15
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Anyone know how much quickcrete it would take to secure a 4x4x6 beam upwards?


A Guy goes to the doctor, "Doc I feel like crap" "Well, lets take your blood pressure" "Sorry I cant stand that" "OK well lets draw some blood" "Sorry I cant stand that" "Ok well, lets take a sample of your urine" "Sorry I cant stand that" and on and on and on.

Here is a forum where people are giving their time to try to help you accomplish an end, but you wont tell them what you are trying to accomplish.

I don't get it, as there many be people who may have done exactly what you are trying to do, and you could benefit from their experience. Why be vague?

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