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Thread: I have a question
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18th January 2010, 02:08 PM #1
I have a question
I have a approx 600 mm wide by 4 metre long slab that has been sitting for a few years.
It has a gorgeous figure (no, not that kind of figure )
I want to use it as a top on an entertainment unit.
It should end up as 1140 x 550 x 36 mm.
Why do I have to cut it up into planks, ruining the pattern in the grain and the joint them back together again?
I have also been told I should reverse the grain but that would ruin the lovely figure completely.
Why can't I just use it as it is?
Thanks for any input.
Cheers
WolffieEvery day is better than yesterday
Cheers
SAISAY
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18th January 2010, 06:08 PM #2
Wolffie, this is a very confusing question, who is telling you to "cut it up into planks"?
I am guessing that someone has told you, or you have read, that to make a stable bench top, you should cut it up to reverse the cupping so that it doesn't warp in use?
My suggestions are.....
- if it has been slabbed for a long time (= >1 year per 25mm thickness), is dry and hasn't warped then it probably wont warp IF YOU DON"T DO ANYMORE HEAVY MACHINING
- if it wasn't wide enough to do the job then you could cut it such that you halve the thickness, open it like a book and you would have a beautiful mirror reversed grain BUT IT IS WIDE ENOUGH!
fletty
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18th January 2010, 06:31 PM #3
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18th January 2010, 07:23 PM #4
It is Acacia Mangium aka Brown Salwood.or Hickory Wattle
I have over 1 ton of it and I am not too keen on cutting it up but I don't want it to warp either.
I have been told by our local timber guru that it moves very little.
Cheers
WolffieEvery day is better than yesterday
Cheers
SAISAY
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18th January 2010, 07:26 PM #5
I have cut a couple of the slabs up and it did not twist at all
Cheers
WolffieEvery day is better than yesterday
Cheers
SAISAY
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18th January 2010, 09:24 PM #6
Never used it, but if it's like blackwood I wouldn't expect it to move too much. Use buttons or such to attach it to the carcass to allow for normal expansion & contraction * you should be OK.
The worst situation will be if it is moved from, say, a hot humid environment to a cool dry one (eg air conditioned room ) or vice versa.
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18th January 2010, 09:43 PM #7
What Alex said plus finish the top and the bottom with the same number of coats to avoid cupping.
- Wood Borer
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