The Forestry Forum is sponsored in part by:

TURBOSAWMILL GIANT SALE ON NOW UNTIL OCTOBER 31st


Forestry Forum
Sponsored by:


TimberKing Sawmills



Toll Free 1-800-582-0470

LogRite Tools



Norwood Industries Inc.


Sawmill & Woodlot Magazine



Your source for Portable Sawmills, Edgers, Resaws, Sharpeners, Setters, Bandsaw Blades and Sawmill Parts

EZ Boardwalk Sawmills. More Saw For Less Money!

STIHLDealers.com sponsored by Northeast STIHL


Woodland Sawmills

Peterson Swingmills

 KASCO SharpTech WoodMaxx Blades

Turbosawmill

Sawmill Exchange

BRUTE FORCE Authorized Dealer

Woodshax Outdoor Vending Solutions

FARMA


Council Tool

Baker Products

ECHO-Bearcat



Author Topic: Spiral bark pattern  (Read 8730 times)

0 Members and 1 Guest are viewing this topic.

Offline Furby

  • Senior Member x2
  • *****
  • Posts: 8003
  • Location: Grand Rapids, Michigan
  • Gender: Male
  • Blurb....
    • Share Post
Re: Spiral bark pattern
« Reply #20 on: March 24, 2006, 10:14:16 PM »
Where is the post Arky made...... Righty tighty, Lefty losey or something like that.

Here we go!
http://www.forestryforum.com/board/index.php?topic=8882.0

Offline Troy

  • Full Member x2
  • ***
  • Posts: 198
  • Age: 57
  • Location: Oak Grove, VA.
  • Gender: Male
  • Good help is hard to find!
    • Share Post
Re: Spiral bark pattern
« Reply #21 on: March 25, 2006, 07:39:26 AM »
Well I milled one of the sixteen foot right hand spiral logs last night.  Did not see any tension to speak of, milled OK.  We'll see what they do as they dry some.  From all that I've read now on the direction of the grain spiral I think the rule of thumb shoulb be:  Righty tighty, lefty - firewood!
Peterson ATS 8" 27hp

Offline Norm

  • Senior Member x2
  • *****
  • Posts: 7659
  • Age: 62
  • Gender: Male
    • Share Post
Re: Spiral bark pattern
« Reply #22 on: March 26, 2006, 05:00:16 PM »
The cherry log with a left hand spiral was 14' instead of 16'. I cut it in half and sawed it up today. It sawed no differently than any other cherry I've done and had no serious tension to speak of. I sawed most of it 6/4 just in case but was pleasantly pleased with how well it turned out.

Offline wiam

  • Senior Member
  • ****
  • Posts: 954
  • Age: 50
  • Location: Barnet, VT
  • Gender: Male
    • Share Post
Re: Spiral bark pattern
« Reply #23 on: March 26, 2006, 07:33:57 PM »
Norm let us know when it is dry. ;)

Will

Offline grade sawyer

  • member
  • *
  • Posts: 8
  • I'm new!
    • Share Post
Re: Spiral bark pattern
« Reply #24 on: April 01, 2006, 06:38:43 AM »
I'm interested to hear how it works out Troy. I had a 16' cherry brought in with a load that has a spiral twist like you describe. I'm going to buck it to 8' lengths and cut it all 6/4 when I slice it up. Hope it helps to minimize the twist effects.
TAKE IT 8/4 AND LOTS OF STICKERS AN LOTS OF WEIGHT.

Offline ARKANSAWYER

  • Senior Member x2
  • *****
  • Posts: 3048
  • Age: 57
  • Location: Wamego, Kansas
  • Gender: Male
  • Poor white Southern trash
    • Share Post
Re: Spiral bark pattern
« Reply #25 on: April 01, 2006, 08:19:49 AM »

  Been really busy and sorry I did not get to this faster.

   The log and boards will be just fine.   Most logs have a slight right hand twist.   1/4 turn in 16 ft is not bad.  Furby brought up my old post and it is good info.   GrandPa always said that a log with left hand twist should be left in the woods to rot has proved true many many times over the years.  Like Ron said it is not good to leave them for seed stock either.   Here most hollow trees are of left hand twist.
  It would be good for follow up report on this to check out the way the lumber lays.
ARKANSAWYER

Offline Norm

  • Senior Member x2
  • *****
  • Posts: 7659
  • Age: 62
  • Gender: Male
    • Share Post
Re: Spiral bark pattern
« Reply #26 on: April 01, 2006, 09:18:04 AM »
I stacked the cherry on stickers inside a morton shed. It's uninsulated so it warms up from the sun during the day and cools off during the night. A week later and the cherry is still flat and straight. Since I'm not sure how it'll turn out in the end I'm going to keep this wood for my own use.

Most of the lumber I saw if it's going to move you know it as soon as you slice the board off the log. I cut a soft maple log the same day, one slab that was 6/4 bowed up a good 8"s on the end. When the blade exited the other end I had rocking horse stock in that board.

Offline SwampDonkey

  • Forester
  • *
  • Posts: 35856
  • Age: 51
  • Location: Centreville, NB
  • Gender: Male
  • Large Tooth
    • Share Post
Re: Spiral bark pattern
« Reply #27 on: April 01, 2006, 02:34:35 PM »
I found an excerpt from a Silvics manual produced at the Maritime School of Forest Technology.

It has been found that the grain of wood in a young conifer usually has a left spiral. As the tree ages the left spiral gradually diminishes until the grain is straight then keeps twist to a right spiral, which increases with age. A tree going through this twisting cycle may be anywhere from 70 to 130 years old before it develops a right-spiral twist. Heavy right-spiral twist is one of the indicators of old growth.

The Textbook of Wood Technology suggests that spiral grain is a normal growth pattern, rather than straight grained wood. The extend and distribution of spirality in an individual tree are affected by environmental factors. The basic pattern of spiral-grain is 'believed' to be hereditary. Some trees contain both left and right spiral grain as you go from the pith to the cambium.

Pre-commercial thinning pays off. :)

'If she wants to play lumberjack, she's going to have to learn to handle her end of the log.'
Dirty Harry

Offline Don P

  • Senior Member x2
  • *****
  • Posts: 4793
  • Location: Southwestern VA
  • Gender: Male
    • Share Post
    • Calculator Index
Re: Spiral bark pattern
« Reply #28 on: April 03, 2006, 06:19:26 PM »
Some trees like gum switch every few years interlocking the grain.

This is a lefty floor joist, the closest one above the girder. It twists up on this side about 1" off the girder in 5" of width, the joist is 13' long.

A number of the logs were leftys, 2 of them had to be deeply kerfed to unwind them enough to lay flat. One has kerfs and a dozen 3/8 x 10" bolts, I think I broke 3 lags in the process as well.

I think the genetics must come into play, there's a stand of lefty hemlock at one edge of our place. All the others around here are pretty much righty.

Offline lawyer_sawyer

  • Full Member
  • **
  • Posts: 86
  • Age: 38
  • Location: Ann Arbor, MI
  • Gender: Male
    • Share Post
Re: Spiral bark pattern
« Reply #29 on: April 06, 2006, 08:44:12 AM »
just curious hwo the fence boards are doing and if you have seen any movement in them drying?
Love the outdoors, chainsaws, my 300 win mag, my wife and my son but not exactly in that order.

Offline Fla._Deadheader

  • Senior Member x2
  • *****
  • Posts: 10388
  • Age: 74
  • Gender: Male
  • Linda Vista, Costa Rica
    • Share Post
Re: Spiral bark pattern
« Reply #30 on: April 06, 2006, 08:23:25 PM »

 We sawed a twisty log, in Florida. The 1X boards would sag over a foot on each end, when ya picked 'em up in the middle of the 8' board.  :o :o :D :D

  They'd be great for trimmin out the inside radius of arch windows er sumpin.  8) 8) ;D ;D ;D
All truth passes through three stages:
   First, it is ridiculed;
   Second, it is violently opposed; and
   Third, it is accepted as self-evident.

-- Arthur Schopenhauer (1788-1860)

Offline Cedarman

  • Senior Member x2
  • *****
  • Posts: 6006
  • Age: 70
  • Location: Marengo In
  • Gender: Male
    • Share Post
    • Cedarusa
Re: Spiral bark pattern
« Reply #31 on: April 07, 2006, 06:41:08 AM »
A lot of the cedar we saw has spiral grain.  It is never more apparent than when we split rails for fence.  I have seen some logs spiral 180 degrees in 10 feet.  But we never see any problem with sawn lumber.

We split sassafras also and some of those logs have 90 degrees in 10 foot.
I am in the pink when sawing cedar.

Offline Fla._Deadheader

  • Senior Member x2
  • *****
  • Posts: 10388
  • Age: 74
  • Gender: Male
  • Linda Vista, Costa Rica
    • Share Post
Re: Spiral bark pattern
« Reply #32 on: April 07, 2006, 08:56:12 AM »

 Maybe Swampy will post a photo of the boards. I THINK we still have a couple boards left.


All truth passes through three stages:
   First, it is ridiculed;
   Second, it is violently opposed; and
   Third, it is accepted as self-evident.

-- Arthur Schopenhauer (1788-1860)

Offline SwampDonkey

  • Forester
  • *
  • Posts: 35856
  • Age: 51
  • Location: Centreville, NB
  • Gender: Male
  • Large Tooth
    • Share Post
Re: Spiral bark pattern
« Reply #33 on: April 07, 2006, 06:37:04 PM »
I've seen the spiral in old cedar telephone poles. I've also seen alot of spiral in lodgepole pine growing on swamps. Also, those old swamp pine are some hard, I've tried cutting them down with an axe and the axe just glances off. I think they're petrified.  ::)

Pre-commercial thinning pays off. :)

'If she wants to play lumberjack, she's going to have to learn to handle her end of the log.'
Dirty Harry


Share via delicious Share via digg Share via facebook Share via linkedin Share via pinterest Share via reddit Share via stumble Share via tumblr Share via twitter

xx
Sweet Gum, spiral grain, will the bark indicate this?

Started by Delawhere Jack on Sawmills and Milling

23 Replies
2951 Views
Last post July 09, 2012, 07:54:24 AM
by Magicman
xx
Wood for smoking, bark on or bark off?

Started by Delawhere Jack on FOOD! FOOD! FOOD!

18 Replies
7133 Views
Last post February 15, 2013, 09:03:08 PM
by martyinmi
xx
Lug Pattern on LT40

Started by 4x4American on Sawmills and Milling

11 Replies
979 Views
Last post March 25, 2015, 09:47:18 PM
by 4x4American
xx
choosing a saw pattern

Started by Qweaver on Sawmills and Milling

4 Replies
1108 Views
Last post July 07, 2010, 05:07:01 AM
by Bibbyman
 


Powered by EzPortal