I was looking through some recent pics and found a good one of amedium ash.. maybe 22" that had a lot of prominent wiskers in the heartwood... Maybe re-size one next week.. New camera/software is not user friendly..
http://www.youtube.com/watch?v=r3rQJvL9LZQ&feature=autoplay&list=ULcrapyE4c6ow&playnext=5
Fer sum raisin, i kant imbed this un...
its fer u Holmes...
and anyone else interested in taking a look at some nice straight hinges.. 30"+ tulip.. looks like the fibers are pretty even in holding...
Might be fairly easy to set up some sort of clamp and lever... since no one has done that yet, best understanding would seem to come from an examination of the postmortem hinge fibers... long hairy fibers show good holding... short stubby fibers show less... rips down the side bark are...
I'd guess the heartwood is the same or even stronger... might depend on species, moisture etc...
When fibers rip down the corners of a hinge, all that shows is that the resistance to rip down the sides is less than it takes to pull the fiber apart, which makes sense. Its going to happen at...
Quote Originally Posted by Bermy View Post
...Norfolk Pines almost all leave big fibre pull on the outside...sometimes it will just fold over and not even tear or pull out, hang on all the way to the ground.
Seems to me that the fibers pull on the corners 'casue they "can"... not cause the...
Nice info.. thanks for taking the time to dig that up.
Any chance of finding anything related to hinge strength in sap vs heart wood? I've seen many hinges where the big fiber pulls were out of the center area.. Don't really recall too many where the big fibers are pulled from the new wood...
You made the statement: "we all know heartwood is dormant, the sapwood is the living "strength " of hingewood." Can you site Shigo's writings on this point?... Jay made a couple posts about the heartwood having more strength in woodworking applications... in looking at hinge fibers it often...
I've heard it attributed to Shigo that the center of a hinge has less strength than the outer "sapwood".. Someone else said definitely not something Shigo said.. can you cite Shigo on either point?
There's another former tree guy around here, that was a big Shigo disciple.. He used to get a little bent when I'd write "dead tree".. The trees not dead... its filled with all kinds of life, bacteria, fungal etc... Call it a "symplastless tree"... oh ya.. that'll look great on the proposals...
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