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Author Topic: Can a 18" sq SYP post be kiln dried for a short period of time to help set sap ?  (Read 1043 times)

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Offline florida

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I've built dozens of piling houses with 8 X 8 and 12 X 12 treated pine posts. I've never noted any serious bleeding from any of them and never had a customer complaint about it either. I think it's a non-issue.
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Offline Sedgehammer

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I've built dozens of piling houses with 8 X 8 and 12 X 12 treated pine posts. I've never noted any serious bleeding from any of them and never had a customer complaint about it either. I think it's a non-issue.
You're my friend....... ;D

@doc henderson I really don't have anything to recut something this big and 18" sq take a pretty big log to begin with

@K-Guy don't the more beat up and twisted the better to a point, but don't want to ruin the integrity of the post either. i'll just leave it like Don and florida mentioned

Offline doc henderson

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I did say "if possible".  and I agree you can just go with it.  If you do not plan to mill your own, then not sure you can find that "theoretical 18 x 18 anyway.  good luck!  :)
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Online Southside

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Ok - but treated posts are dried down to below 26% MC before being placed into a vacuum chamber, being drawn down more, then having treatment applied under pressure into the now dry wood fiber.  Not really the same comparison.   
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Offline Sedgehammer

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I did say "if possible".  and I agree you can just go with it.  If you do not plan to mill your own, then not sure you can find that "theoretical 18 x 18 anyway.  good luck!  :)
Yup, you did
Already found it..... ;D

Offline Don P

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Basically with any drying, if surface tension perpendicular to grain, caused by shrinkage of the shell over the swollen green core, exceeds tensile strength of the wood perp to grain (which is the weak direction in wood) checking begins. In a radical drying scenario like this one surface checking begins all over the timber. There would be many "tears" in the fabric of the wood. They wouldn't necessarily be all that apparent immediately, the core moisture would rise, swell the shell and close them but the tear has occurred. Later as the timber continues to dry those tears continue to enlarge and severe checking shows itself. Remilling won't cure that. Too aggressive a drying schedule or mishandling wood early on bites you later.

I sawed some white oak one time in early June. Clear, dry conditions, a highly refractory (check prone, low tension perp strength) species. I stickered onto my trailer then drove uncovered about 10 miles to deliver the wood. When I arrived it was all checked. I acknowledged my mistake to the farmer and luckily he was fine with it saying it was just fence boards. By the time we had unloaded, the moisture rose from the wet core to the dry surface. The checks closed and the wood appeared fine. No, the tears were there and just like the initial tear in fabric, hard to start but once begun it runs easily. I had ruined that lumber by mishandling it at high moisture.
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Offline cabindoc

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that said, you can make them oversized, and saw down to size after.  if possible.
Definitely!  even an inch bigger.  
Scott  aka cabindoc  aka logologist at large
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Offline K-Guy

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don't the more beat up and twisted the better to a point, but don't want to ruin the integrity of the post either


That character you are talking about often weakens the wood.
Nyle Kiln Sales & Service
"He has all the virtues I dislike and none of
 the vices I admire." -Winston Churchill

Offline Sedgehammer

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don't the more beat up and twisted the better to a point, but don't want to ruin the integrity of the post either


That character you are talking about often weakens the wood.
Yes it does. I like some of that, but not too much due to what you mentioned

Offline doc henderson

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so what did you find in an 18 inch square size?  any pics of these beams.
timberking B 2000, 277c track loader, PJ 32 foot gooseneck, 1976 F700 state dump truck, JD 850 tractor.  2007 Chevy 3500HD dually, home built log splitter 18 horse 28 gpm with 5 inch cylinder and 32 inch split range with conveyor 12 volt tarp motor

Offline Sedgehammer

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so what did you find in an 18 inch square size?  any pics of these beams.
SYP. Picking up in a couple of weeks or so

Offline cabindoc

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Since it has not been brought up, ask the seller of your big beams when the tree was felled.  If cut down in winter months, sap will be down and will be minimal.  If cut down summer months, sap will be plentiful and you will likely get sap all over yourself just handling the beam.   We expect pics when u pick it up.....just sayin..... 
Scott  aka cabindoc  aka logologist at large
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