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6x6 splitting

HiItsMeJimmy

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Sep 1, 2012
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66
Have a 40 x 64x14 post set every 8'. Noticed post splitting/ splintering length wise. Read this is normal with dimensional treated lumber. Anyone else have this problem?
 
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nehog

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Jan 2, 2010
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Jaffrey, NH
Have a 40 x 64x14 post set every 8'...

Where did you ever find 64 x 14 posts 40' long? :scared:

Ok, seriously, I did understand what you are really saying, can you post an image of one? Slight cracking/splitting is probably normal, a lot depends on where in the log the 6x6 was cut from, the size of the log and how old the tree was.
 

Tim The Tool Man

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Mar 1, 2012
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Location
Lehigh Valley, PA
I agree post a couple pictures of the offending beams. Keep in mind that splitting and twisting is normal for pressure treated posts. It is the degree to which they split and twist that you may need to be concerned about. Again, pictures please...
 

BFBOB

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Sep 20, 2011
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OK, call me stupid, but I can't see how those dimensions work with inches, millimeters or centimeters.
 
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BFBOB

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Sep 20, 2011
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AHA!!
That said, indeed splitting and twisting are normal for treated lumber, whether is't southern yellow pine or oak. I've used both.
Spiltting doesn't much affect the strength when used as a post. Used as a beam, splitting in the horizontal plane does affect strength, in the vertical not much. Twisting doesn't affect post strength much, but it can seriously affect the strength of horizontal members attached to it. A serious twist could pull nails by over an inch, and if bolted, could warp a sidewall or even break a horizontal purlin.
As others have said, PICTURES!
I've avoided specifics because all of the foregoing is a question of degree.
 

cowboyjim

Member
Joined
Sep 29, 2011
Messages
21
Location
Bushnell, Florida
That's why my 3 pole barns were built using 3 2x6s for each post. Buried portion plus about 3 feet up are pressure treated and the remaining portion non treated. Pressure treated / non treated sections finger jointed. no twisting or bending.
 

theoldwizard1

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Feb 22, 2011
Messages
43,123
Location
SE MI
I have 4x6 PT used for gate posts with heavy wooden gates hung on them. One split all the way down to the concrete.

When I replaced it (a story in itself) I used a long 1/4" drill bit to drilled through the 6" dimension and inserted a 6" galvanized carriage bolt, washer and nut just above and below each hinge.

No more splitting !!
 
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