To avoid these ads, REGISTER NOW!

In ground post treatment

akpolaris

Well-known member
Joined
Jun 14, 2010
Messages
214
Location
Seward, Ak
I will be sinking some 6x6 posts into the ground in cement for uprights for a swing set. I want the cement below the ground instead of using sono tubes so I can have grass on the surface. What is the best way to treat the posts for log term preservation. I will be using treated wood (ground contact material). Is tar a a good option or something else preferred?
 
To avoid these ads, REGISTER NOW!

finn

Well-known member
Joined
Mar 27, 2005
Messages
16,252
Location
The UP, God's country
Don’t get too carried away. Eventually the kids grow up, the swing looks like ****, and you get tired of mowing and trimming around it so you want to get rid of it.

I went through this with the basketball hoop in the driveway.

Use the minimum amount of concrete possible, if any at all.

I wouldn’t plan on it being used for more than ten years, so I doubt if any preservative is necessary at all
 
OP
A

akpolaris

Well-known member
Joined
Jun 14, 2010
Messages
214
Location
Seward, Ak
Don’t get too carried away. Eventually the kids grow up, the swing looks like ****, and you get tired of mowing and trimming around it so you want to get rid of it.

I went through this with the basketball hoop in the driveway.

Use the minimum amount of concrete possible, if any at all.

I wouldn’t plan on it being used for more than ten years, so I doubt if any preservative is necessary at all
This is for grandkids, already done my kids swing set. I'll just cut this off at the ground if necessary. A couple of years ago my wife called me at work to say that the swing set had been stole out of the yard. Not possible I told her, much too big and ackward. After looking around a bit she determined that a moose had gotten caught up in a loose swing and dragged the thing about 50 yards till it ran between 2 large trees and the 10" top cross piece snapped between the 2 trees. Moose hair and splintered wood all over.
 

rayra

Well-known member
Joined
Dec 1, 2014
Messages
4,724
Location
Escaped from Los Angeles
In ??. Tar paper?
Butyl rubber window flashing, wrapped around the post in the region where it will be in contact with wet soil.

And I'd fill the bottom of the holes with gravel, set the post on gravel, then concrete around the post. You make a complete concrete 'cup' encasing the bottom of the post, it will rot even faster.

But as mentioned above, the kids will quit playing on it long before that happens
 

Old Moparz

Well-known member
Joined
Jan 21, 2005
Messages
1,171
Location
Newburgh, NY 12550
No concrete, no digging & the wood won't be sitting on the soil to promote rot. This could easily be adapted from a deck footing to a swing set. I would bridge the two anchors with another piece of wood & set the swings on top.

 

Attachments

  • Swing Set Auger 01.jpg
    Swing Set Auger 01.jpg
    137.8 KB · Views: 24

Stelzer

Well-known member
Joined
Mar 14, 2022
Messages
448
Location
Portland, OR
This is for grandkids, already done my kids swing set. I'll just cut this off at the ground if necessary. A couple of years ago my wife called me at work to say that the swing set had been stole out of the yard. Not possible I told her, much too big and ackward. After looking around a bit she determined that a moose had gotten caught up in a loose swing and dragged the thing about 50 yards till it ran between 2 large trees and the 10" top cross piece snapped between the 2 trees. Moose hair and splintered wood all over.
I don't have any great advice. Just wanted to thank you for the visual of the moose trailing your swingset all over creation. Would've been great to get that on video.
 
OP
A

akpolaris

Well-known member
Joined
Jun 14, 2010
Messages
214
Location
Seward, Ak
No concrete, no digging & the wood won't be sitting on the soil to promote rot. This could easily be adapted from a deck footing to a swing set. I would bridge the two anchors with another piece of wood & set the swings on top.

I wish it was that simple. Wifey found a design that she likes on Pintrest (i hate Pintrest). Not hugely complicated but I hate digging holes and that will be necessary
 
OP
A

akpolaris

Well-known member
Joined
Jun 14, 2010
Messages
214
Location
Seward, Ak
I don't have any great advice. Just wanted to thank you for the visual of the moose trailing your swingset all over creation. Would've been great to get that on video.
Luckily the set was wooden, had been outside for close to 25 years (brittle), the trees were close enough and big enough to stop the long pieces and break them. We are kinda a wooded area but city moose get into swingsets and Christmas lights all the time and it isn't pleasant. They get wrapped around their legs and caught up in **** causing F&G to get involved.. But I would have liked to see it as well
 

LopezBart

Well-known member
Joined
Oct 13, 2023
Messages
2,539
Location
Lopez Island, WA
I've heard of folks putting the ends of the posts in heavy duty contractor plastic bags... not sure if this keeps them wetter or not, though. Others recommend Postsaver sleeves. I've just used pressure treat, but I'm not around any old posts I buried anymore.
 

Stuart in MN

Well-known member
Joined
Sep 8, 2005
Messages
23,112
Location
Minneapolis

finn

Well-known member
Joined
Mar 27, 2005
Messages
16,252
Location
The UP, God's country
This is for grandkids, already done my kids swing set. I'll just cut this off at the ground if necessary. A couple of years ago my wife called me at work to say that the swing set had been stole out of the yard. Not possible I told her, much too big and ackward. After looking around a bit she determined that a moose had gotten caught up in a loose swing and dragged the thing about 50 yards till it ran between 2 large trees and the 10" top cross piece snapped between the 2 trees. Moose hair and splintered wood all over.
The grandkids grow up too. Hard to believe my granddaughter is a Junior in college, and the grandson is driving.

Seems like yesterday that I was helping set up their swing set, but in reality, they just aren’t used much after the gods get past ten or so. Then they become an eyesore and obstacles for mowing around.
 
To avoid these ads, REGISTER NOW!

Copymutt

Well-known member
Joined
Sep 3, 2016
Messages
3,390
Location
Colorado
We have western red cedar fence posts direct buried in 1978. Still no signs of decay and fence is solid. These are not big box store posts. Cut from 10” logs.
 

LopezBart

Well-known member
Joined
Oct 13, 2023
Messages
2,539
Location
Lopez Island, WA
We have western red cedar fence posts direct buried in 1978. Still no signs of decay and fence is solid. These are not big box store posts. Cut from 10” logs.
There are cedar stumps here on the island that date from the initial deforestation perhaps 110 years ago. Seward gets at least twice the rainfall we do here, though, and they get more than 2 inches every month, so their experience w/ rot may well be different than ours.
 

acer66

Well-known member
Joined
Dec 4, 2010
Messages
4,418
Location
Western North Carolina
I second the ones that say the rot happens close to the surface.

I installed fences for a while and that is where most wooden posts decay and fail due to dry rot.

In ground and above ground the posts are most of the time still good.
 

ATC

Well-known member
Joined
May 12, 2012
Messages
8,269
Location
VA
The amount of labor involved in pulling out a rotted post set in concrete and replacing it is far more than a few bucks for a sleeve.

A hi-lift jack (farm jack) or in my case, a skid steer, make quick work of pulling posts.
 

Captain Spaulding

Well-known member
Joined
Feb 13, 2017
Messages
751
Location
Southern Indiana
A hi-lift jack (farm jack) or in my case, a skid steer, make quick work of pulling posts.
What will you hook to on a rotted post?

Not a chance in the word of pulling an intact concrete set post with either unless it’s barely in the ground. I have an 8000 pound plus tractor with loader and can easily lift the backend off the ground chained to a 6” round post set in concrete.
 

Ing3018

Well-known member
Joined
Sep 3, 2009
Messages
188
Location
Michigan, USA
When the power company here installs a new utility pole, they auger the hole larger than the diameter of the pole and then fill the annular space with a crushed stone. I think this keeps the area around the pole drier and the stone also helps lock the pole in place better.
 

Dan in Pasadena

Well-known member
Joined
Feb 18, 2009
Messages
13,135
Location
Pasadena, CA
FYI, Didn't read everyone's post above:

1. DO NOT encase the entire bottom of the post in concrete. Doing that is like standing it in a pot of water so it will rot faster.
2. Use pressure treated lumber, dig your post hole and put half a small bag of aggregate in the bottom and let it encase the bottom of the post a few inches....THEN place your concrete.
3. If you're not going to allow the concrete to rise above the grass then the grass will grow into contact with the post and when you weed whack around it you will gradually remove the pressure treating which speeds up rot.


Like this:

1716342803252.png
Best of luck
 

Youngandfree

Well-known member
Joined
Dec 29, 2020
Messages
877
Location
VA
Postsaver Rot Protection Sleeve | for (5.5” x 5.5”) or (7” Dia) Posts | Protect Wood Posts from Ground-Line Rot | 1 Piece (SKU-9) https://www.amazon.com/dp/B082VLL9NG?tag=atomicindus08-20
I will be sinking some 6x6 posts into the ground in cement for uprights for a swing set. I want the cement below the ground instead of using sono tubes so I can have grass on the surface. What is the best way to treat the posts for log term preservation. I will be using treated wood (ground contact material). Is tar a a good option or something else preferred?
 

ATC

Well-known member
Joined
May 12, 2012
Messages
8,269
Location
VA
What will you hook to on a rotted post?

Not a chance in the word of pulling an intact concrete set post with either unless it’s barely in the ground. I have an 8000 pound plus tractor with loader and can easily lift the backend off the ground chained to a 6” round post set in concrete.


 

ATC

Well-known member
Joined
May 12, 2012
Messages
8,269
Location
VA
Might work somewhere, but no chance of pulling a post like that around here. A pressure washer after digging down a couple of feet all around might get it out.

Well, the OP, and many more people live "somewhere" in relation to you...

Worked great for the guys in the video :dunno:
 

Stuart in MN

Well-known member
Joined
Sep 8, 2005
Messages
23,112
Location
Minneapolis
I think in most cases concrete isn't necessary as long as the post is set deep enough and appropriate fill is used.
There are several different brands of those post sleeves available, some of them are only a few dollars a piece. If I ever set any new posts in the ground I'm going to use them - every post I've ever removed had rotted just under the ground surface, and the bottom was still in good shape.
 
To avoid these ads, REGISTER NOW!
Top Bottom