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Old 05-15-2012, 07:36 PM   #1
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Right way to cement a 4x4 post into the dirt


I have a pretty good Idea but thought I should ask 1st, I got some pressure treated 4x4x8 post & plan to make a gate in my front yard.

I was just gonna dig a hole about 2 feet deep & ( maybe? place a big rock under the post? ) & then pour the cement in while trying to keep the post as straight as possible as the cement dries..?
& the repeat on the 2nd one?

Am I forgetting anything?
I tend to over think things, but this seems pretty simple, but will be the 1st time I've ever done something like this.

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Old 05-15-2012, 08:26 PM   #2
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Right way to cement a 4x4 post into the dirt


You pretty much have it right.....

About the only thing different might be to use gravel instead of a rock....

I personally drop a little bit of gravel...then I put a thin layer of concrete...then the post.....you reduce the chances of water wicking up to the post.

Some guys may suggest a 'tube'...I think they are called "sono tubes"...it's basically a cardboard tube you put in the ground...reduces the amount of concrete you have to use....makes for a cleaner concrete chunk....most commonly used when the hole is way too big....

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Old 05-15-2012, 09:27 PM   #3
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Right way to cement a 4x4 post into the dirt


Also, consider bracing the posts in both the x and y axis. Holding the posts until the concrete has sufficiently hardened isn't a lot of fun. Also, you might think it's set enough, but if you're wrong, you'll end up with posts slightly off-plumb.
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Old 05-15-2012, 09:30 PM   #4
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Right way to cement a 4x4 post into the dirt


i'd go 3' deep and use a sono tube. put the 4x4 in the tube and pour the cement in, then lift the sono tube up about 6-10inch and then push it back down. this "mushrooms" the bottom. level up your post and ta da!
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Old 05-15-2012, 09:41 PM   #5
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Right way to cement a 4x4 post into the dirt


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Originally Posted by princelake View Post
i'd go 3' deep and use a sono tube. put the 4x4 in the tube and pour the cement in, then lift the sono tube up about 6-10inch and then push it back down. this "mushrooms" the bottom. level up your post and ta da!

Ahhh.....neat trick....thanks
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Old 05-15-2012, 10:31 PM   #6
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Right way to cement a 4x4 post into the dirt


Quote:
Originally Posted by princelake View Post
i'd go 3' deep and use a sono tube. put the 4x4 in the tube and pour the cement in, then lift the sono tube up about 6-10 inch and then push it back down. this "mushrooms" the bottom. level up your post and ta da!
Assuming you're trying to mimic a bigfoot-style footing...

When you push the sonotube back down (and keep it down, I assume), doesn't that separate the concrete in the sonotube form the concrete in the mushroomed base? If it's not continuous, I don't see what benefit that mushroomed footing has over just a straight column. The column could heave independently from all that concrete you let pour out of the bottom 6-10 inches. Just wondering if I misunderstood you.
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Old 05-15-2012, 11:10 PM   #7
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Right way to cement a 4x4 post into the dirt


Well I could not wait for replies & went & just did it, seems ok so far????



I feel pretty proud of my self seems to of come out pretty good for a guy that has no clue what he's doing.
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Old 05-15-2012, 11:58 PM   #8
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Right way to cement a 4x4 post into the dirt


make sure that water wont pool around the post.
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Old 05-16-2012, 12:18 AM   #9
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Right way to cement a 4x4 post into the dirt


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make sure that water wont pool around the post.
Thanks for the tip, I'll make a slant away from it with dirt.

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