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Author Topic: SYP for floor joists and air drying procedures  (Read 2847 times)

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Offline GeneWengert-WoodDoc

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Re: SYP for floor joists and air drying procedures
« Reply #20 on: April 30, 2013, 08:42:30 PM »
One item to emphasize:  The reason for drying of SYP is that oftentimes a piece will warp severely...bow and twist.  So, by drying, you can eliminate the bad behaving pieces.  As Magicman indicated, most of the bad pieces will come from within 4" of the center of the log.  THis wood is sometimes called juvenile wood, and it does shrink lengthwise, plus has spiral grain.  Note that this bad behavior is common in SYP, but is not seen so much in other species.

A caution about drying SYP.  The drier it gets, the harder it is to nail...nails will bend and will follow the grain.  So, higher MC is likely better.  That is why Canadian SPF is used so much...light weight, easy to cut and fasten, but it does need shorter spans.

Regarding the code, etc., if you do have a loss from a strong wind, if the insurance company finds out that you did not have graded lumber (which indicates the minimal strength, or at least they think so), they might not cover your loss.  How would they know?  When they come to inspect the loss, they might notice the unusual size of the framing.

Incidentally, 80% of the framing in GA (which is the #1 forested Souther state) is actually from Canada...Canadian SPF (which stands for spruce, pine, fir).  Also, 50% of the SYP cut at commercial mills will be pressure treated.  Due to warp, commercial mills try to avoid making 2x4s...plus the market is poor due to warp.
Gene - Author of articles in Sawmill & Woodlot and books: Drying Hardwood Lumber; VA Tech Solar Kiln; Sawing Edging & Trimming Hardwood Lumber. And more

Offline WDH

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Re: SYP for floor joists and air drying procedures
« Reply #21 on: April 30, 2013, 09:06:10 PM »
Suppose it was a fence row tree and after felling you wanted to get above the wire.  You may have to jump butt it 3'-4'.

No!

Try 6' - 7'  :D :D :D :D  (http://www.forestryforum.com/board/index.php/topic,66294.msg991005.html#msg991005)
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Offline tyb525

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Re: SYP for floor joists and air drying procedures
« Reply #22 on: April 30, 2013, 09:17:55 PM »
All the wider 2x's are SYP around here. 2x8s, and up. Sometime you'll get a SYP 2x6.
LT10G10, Stihl 038 Magnum, many woodworking tools. Currently a farm service applicator, trying to find time to saw!

Online Magicman

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Re: SYP for floor joists and air drying procedures
« Reply #23 on: April 30, 2013, 09:20:55 PM »
  No!  Try 6' - 7'
:)  I was thinking about you when I wrote that.   ;D
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Offline WDH

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Re: SYP for floor joists and air drying procedures
« Reply #24 on: April 30, 2013, 09:22:13 PM »
Yes, that is funny!
Woodmizer LT40HDD35, John Deere 2155, Kubota M5640SU, Nyle L53 Dehumidification Kiln, and a passion for all things with leafs, twigs, and bark.  hamsleyhardwood.com

Offline REGULAR GUY

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Re: SYP for floor joists and air drying procedures
« Reply #25 on: May 07, 2013, 02:38:33 PM »
If end checking is no problem with SYP, I guess there is no need for logs to be cut much longer than a few inches longer than the board is gonna be?!!?    If most of the bad lumber is within 4" of the center, should I just elimenate that part, or if not should I put the pith in the center of a 2x whatever, or does it matter if the pith is on the edge of the board?   Being curious, if it was a 6x6 or 4x12, does it matter where the center (pith) is?    Should I put weight on the "stickered" stack of dryin lumber?  Thanks guys, I'm  learnin a bunch.  Regular Guy                   

Offline beenthere

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Re: SYP for floor joists and air drying procedures
« Reply #26 on: May 07, 2013, 04:40:29 PM »
Yes to your questions.  The pith of SYP will have a tendancy to shrink in length so you can include that fact in your decisions as to where to place the pith in your lumber/timbers.
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Offline WDH

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Re: SYP for floor joists and air drying procedures
« Reply #27 on: May 07, 2013, 07:57:30 PM »
Always try to center the pith in the widest board that you can.  All commercial pine sawmills include the pith, they just square up the cant to the target size for that cant, and run the cant through a gang saw.  This usually centers the pith.  If the pith is on the edge of a timber, the timber will develop side bend for the reason beenthere pointed out.  Same for a board. 
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Online Magicman

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Re: SYP for floor joists and air drying procedures
« Reply #28 on: May 09, 2013, 10:06:32 PM »
I just ripped out a stud wall this past week that had pith in some of the 2X4's. 

That being said, the pith is not always (and usually not) centered in a SYP log for various reasons.   I would saw the logs into whatever lumber you need and then select it's use.  Not all framing lumber is used in a structural sense.  You need temporary braces, shorts for building corners and T's, etc.
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