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Forum topic by DustyGuy posted 09-28-2015 09:49 PM 593 views 0 times favorited 3 replies Add to Favorites Watch
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DustyGuy

14 posts in 701 days


09-28-2015 09:49 PM

Topic tags/keywords: question

I am in the process of building a 44” round maple table that will expand to 80” with 2-18” leaves. Everything was going fine. I glued up the 4 panels ( the grain going the width of the table rather than the length ) , 2 24" x 45" and 2 20” x 45” and today carried them to a friends shop who has a 36” belt sander. They turned out beautiful! The grain matched nicely and all the glue joints were nice & tight. Of course, there had to be a slight issue or I wouldn’t be writing this! Two of the panels have slightly bowed along the length. The table will have a square base and there will be aprons all around as the customer wanted the aprons on the two leaves as well, so that when the table is fully extended, it will look better. I will be attaching the top to the base aprons with “Z’- clips to allow for movement.

Yes, there is a question! I don’t want to trust the aprons to hold the slight bow, so I’m looking at different options to relieve the stress causing the bow. My friend suggested cutting a couple relief grooves about 1/2 of the thickness on the underside and then clamping them flat, filling them with tight fitting splines. I’ve seen other tops that have a V-groove cut on the underside. Of course, I’ll need to stop the kerfs back from the edge so they won’t show.

I’m of the opinion the the kerf method should work, I can press them both flat with one finger and not a lot of pressure.

I’ll welcome any and all advise and/or suggestions!

Thanks!
Norm

-- Norm Miller


3 replies so far

View Bill White's profile

Bill White

4459 posts in 3428 days


#1 posted 09-28-2015 09:52 PM

Yep! The kerf should work.
Bill

-- bill@magraphics.us

View DrDirt's profile

DrDirt

4169 posts in 3210 days


#2 posted 09-28-2015 10:18 PM

Not a big fan of cutting grooves.

How much movement is there (if you are holding the middle down – - how much is each side raised?)
If you glue in splines it will still move… just maybe a little less.

It is still wood and will always move. Once you have a finish on it (both sides) movement will be much less.

Since you are able to flatten the table with finger pressure = I would just pull it down with your clips.

Otherwise – will the client look under their “New” table and say WTF happened here?

-- 'Political correctness is fascism pretending to be manners' ~George Carlin

View DustyGuy's profile

DustyGuy

14 posts in 701 days


#3 posted 09-28-2015 11:40 PM

@DrDirt… It has occurred to me that it has been pretty dry here in central Alabama for the past few weeks, and over the weekend a front moved in bringing a lot of moisture in the air and it pretty much rained all night and morning. I think that before I do anything drastic, I’m going to put a 1/8” strip under each side and then put some pressure in the center that’s raised and let it sit for a day or so.

-- Norm Miller

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