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Thread: Drying wood - what went wrong?
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18th September 2018, 09:32 PM #1Senior Member
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Drying wood - what went wrong?
Last year we had a tree removed from our back yard. I am pretty certain that it was a Blue Mountains Ash, E. obliqua. It was a multi-stemmed tree, having regrown from an earlier stump.
I had some of the larger trunks cut to lengths that I could handle, and halved by the arborists. Then I milled what I could with my bandsaw, painted the end grain and stacked the sawn timber under the eaves of my workshop, on the cool side. It is now 11 months since the timber was milled and I was getting ready to use some of is for segmented turning.
I chose a piece that was originally about 80 mm square, and has shrink to 70 mm. It had a few small cracks in the end grain, but the sides looked OK. But when I ripped it down the centre, it has huge cracks almost the full length.
IMG_7427.jpgIMG_1321.jpg
The images show the outside of the piece and the split interior.
Can anyone suggest if this is likely to be a feature of the species, or something I did wrong in the drying process.
I have seasoned other timber in a similar way without problems.
Bruce
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18th September 2018, 10:19 PM #2GOLD MEMBER
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I have some timber that did the same. Essentially the cells collapsed and caused the voids. Some timbers are prone to this.
Of note is that closely stickered, very slow drying timber in my shed does not exhibit this. But drying outside, in the shade/rain and I have the same as your experience.
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19th September 2018, 08:59 AM #3
Post this in the "Timber" forum as the timber millers will have more experience with drying.
Mobyturns
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19th September 2018, 10:54 AM #4.
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19th September 2018, 12:45 PM #5
Wouldn't be surprised if this piece was in fact a boxed heart
That would also explain the heavy amount of degrade and distortion...MMMapleman
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20th September 2018, 09:55 AM #6Senior Member
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I had to look up “Boxed heart” but I can now rule that out as a cause. I you look closely at the first pic, the is actually a piece of included bark on one edge - added to the fact that I was very careful to mill out the heart in each piece.
I will try a post in the miller’s forum as suggested, but I suspect that Bob is close to the mark and it is unusually reactive Wood due to the stresses in the multi-stemmed tree. I had some impressive movement in bowls turned green in the same timber.
I have also noticed a lot of small cracks formed within 2-3 growth rings and have seen the same thing in recycled mountain ash in a timber yard.
Bruce
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20th September 2018, 01:59 PM #7GOLD MEMBER
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The distortion in the first picture is classic collapse. Same can be said for the internal splitting. Multi trunked gums are never good sawing. Put with this the fact we have had some extremely windy weather over the winter and you have excellent conditions for significant downgrade. Obliqua is notorious for collapse and even under ideal conditions, usually requires reconditioning (steaming).
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20th September 2018, 05:28 PM #8Senior Member
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Thanks Rusty - good to have some local knowledge. Pity it is so prone to problems, because it is a very pretty timber. Having said that, I will avoid it in future - not that I have any more to cut down. At least it burns well in the fire!
Bruce
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