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Forum topic by Freund posted 02-29-2012 04:12 PM 1739 views 0 times favorited 6 replies Add to Favorites Watch
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Freund

4 posts in 1739 days


02-29-2012 04:12 PM

Topic tags/keywords: question

I am building a huge expanding dtable from 1/4 sawn Oak.

I am concerned about expansion in the top.

I am planning to make the top 7/8 thick, with a band that will enclose the edge.
tounge and groove jointed

On the edge, I was thinking of running 3/8 dowels through the end.

Should the edge banding be touge and grove as well?
I have seen tables like this, but am unsure how they keep them from moving etc

see attached drawing

-- Karl Freund, http://www.carpentryinnovations.org


6 replies so far

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Loren

8295 posts in 3108 days


#1 posted 02-29-2012 04:16 PM

Wood always moves.

(Solid wood does anyway.)

The current style is to make table tops flat. Antiques sometimes
have frame and panel tops. The problem is crumbs get caught in
the grooves.

One way to control it and make the top flat and flush is to use
“veneers” up to 1/4” thick over MDF or solid wood with the
grain running the other way.

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Freund

4 posts in 1739 days


#2 posted 02-29-2012 04:32 PM

So on the frame and panel, solid

Do I just glue up the interior panel, then make the frame 1/8 larger to allow for movement? And make that joint a tounge and grove as well.
Agian, this is 1/4 sawn Oak.

Veneer does not meet the design criteria

-- Karl Freund, http://www.carpentryinnovations.org

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404 - Not Found

2544 posts in 2429 days


#3 posted 02-29-2012 04:40 PM

I made a similar table last year.

http://lumberjocks.com/projects/55523

I veneered it using 2.5mm veneers top and bottom. I didn’t want to veneer it, but it was the only way to avoid movement.
If it really has to be solid, I would make it without the frame and just leave the edges as end grain.

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Loren

8295 posts in 3108 days


#4 posted 02-29-2012 04:50 PM

Well, you look at the width of the panel and look up
the movement coefficient per 12” width of the
wood species you are using, measure the moisture
content of the stock and calculate the amount of
width travel the panel needs to make and cut the
t&g joints accordingly.

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Freund

4 posts in 1739 days


#5 posted 02-29-2012 09:50 PM

Thank you for your valuable input. I have used different wood movement estimators that are on the avaliable on the internet. I have not found one that specifically addresses 1/4 sawn Red Oak .

-- Karl Freund, http://www.carpentryinnovations.org

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Loren

8295 posts in 3108 days


#6 posted 02-29-2012 09:56 PM

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