Thanks Thanks:  0
Likes Likes:  0
Needs Pictures Needs Pictures:  0
Picture(s) thanks Picture(s) thanks:  0
Results 1 to 3 of 3
  1. #1
    Join Date
    Mar 2012
    Location
    Forrest
    Posts
    1

    Default Visual stress grading of plantation hardwood

    HI all,
    Did a hardwood visual stress-grading course a while back and seemed to remember that it only applies to forest logs rather than plantation but I can't find anything written about that. Can anyone advise?
    Thanks
    James

  2. # ADS
    Google Adsense Advertisement
    Join Date
    Always
    Location
    Advertising world
    Posts
    Many





     
  3. #2
    Join Date
    Jan 2013
    Location
    the sawdust factory, FNQ
    Posts
    1,051

    Default

    Visual stress grading is based on mature trees, rather then juvenile ones. I am aware that at least one species has been downgraded an F grade in recent times due to the increasing chance of the timber being sourced from plantation stock rather then mature trees.

    I am unaware of any formal ruling regarding immature timber but that doesn't mean there aren't any ( I don't cut plantation timber so haven't needed to know).

  4. #3
    Join Date
    Jan 2013
    Location
    the sawdust factory, FNQ
    Posts
    1,051

    Default

    Forgot to add that there was a fairly intensive trial of mid rotation E. pelliata done several years ago. The timber was very poor based on visual stress grading, however mechanical testing to failure revealed that despite the poor visual grading results it was in fact able to carry the equivalent MP grade quite easily. That may or may not carry over to other species.

Similar Threads

  1. bunya pine stress grading?
    By charlsie in forum SMALL TIMBER MILLING
    Replies: 13
    Last Post: 16th December 2010, 09:43 PM
  2. Visual Calipers
    By joe greiner in forum WOODTURNING - GENERAL
    Replies: 13
    Last Post: 21st August 2009, 09:57 PM
  3. hardwood grading ticket corse - brisbane
    By weisyboy in forum SMALL TIMBER MILLING
    Replies: 10
    Last Post: 4th May 2009, 09:35 PM
  4. reducing stress in hardwood logs.
    By johnnyroberts in forum SMALL TIMBER MILLING
    Replies: 16
    Last Post: 2nd December 2008, 06:23 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •