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Reply by EPJartisan

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Posted on why so up tight!?

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EPJartisan

1045 posts in 1723 days


#1 posted 1256 days ago

Well, gymnosperms lack a few cell types to create real tension (pulling force) in the wood cells. No or few lateral fibers or lateral parenchyma vessels, they also do not have short enough vertical tracheid cell formation in the Xylem layer…. also all branches on gymnosperms start directly from the pith of the tree, no matter how old it is, not from meristem cells in the cambium layer. I am not sure if this explains much, but the physics involved, means each branch is held up from below, not from above, which would cause tension wood. Angiosperms have long fibers and short vessel trachieds making more of a brick AND lattice work holding the tree up from below and from above. It is a matter of biology and cell structure. But like I said.. it can be verified, which is the nice thing about science. But seriously cathyb, looking at a whole tree one may see where the more obvious stresses can be, but external examination can easily miss internal aspects like over grown knots and cell decay. The only way most of us woodworkers will ever know is by learning the material and how much is totally up to the individual. And like I said, every tree is unique, meaning each board can be a surprise… which is why I love the medium, love knowing things, love making things.. and love being wrong or making mistakes to refine myself. :)

-- " 'Truth' is like a beautiful flower, unique to each plant and to the season it blossoms ... 'Fact' is the root and leaf, allowing the plant grow and bloom again."


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