Reply by Bill Davis

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Posted on Designing a Sushi Tray - wood movement problems?

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Bill Davis

226 posts in 5255 days

#1 posted 11-16-2011 02:50 AM

Very likely there will be but it depends on several things.

If the wood is in equilibrium with the relative humidity and the RH remains constant there will be no problem (No expansion/contraction will occur but not too likely).
If the RH does not remain constant (very likely) the wood will expand or contract maybe 10 to 100 times as much different between the main board and the runner (Maple should be anout 20 times).
The expansion/contraction will be slower but not eliminated if a finish is applied.
If the top board is quarter sawn the difference in expansion/contraction will be less.
Different wood species expand/contract at different rates.

So use quarter sawn Greenheart wood with several heavy coats of moisture impervious finish and minimize the RH variation.

Or don’t glue the runner but use some kind of ‘slip’ joint.

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