Expansion and contraction issue - Woodworking Talk - Woodworkers Forum
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post #1 of 4 Old 03-14-2018, 10:45 AM Thread Starter
Dan Gallagher
 
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Expansion and contraction issue

I'm building a storage table out of white oak. Moisture content 6-9%. The shelved will be 16 - 18"wide. I'm concerned the the expansion and contraction of the sides and shelves will cause some splitting. I was planning to attach the shelves to the sides with glue and screw(s)in the center of the shelves and with screws thru elongated holes in the ends without glue, as shown below. Will that be enough to avoid the problem? Also would I be able to get away with two screws with glue in the middle or should I only use one.

Thanks in advance for your wise counsel.

Dan
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post #2 of 4 Old 03-14-2018, 01:11 PM
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if the sides are solid wood, and the shelves are solid wood, and the grain is oriented the same direction - the E&C will be same for both, or no issue. so if all the grain is going the same direction, sides, top, shelves - you are in good shape.
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post #3 of 4 Old 03-14-2018, 02:16 PM Thread Starter
Dan Gallagher
 
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Thanks. I wondered about that after the post.
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post #4 of 4 Old 03-14-2018, 07:05 PM
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There can be some issues with wood movement if you glue the wood together for the width you need. I think you would be better off making the face and the doors out of solid wood and make the interior out of plywood. Using solid wood it would be better to keep the fastening the shelves to a minimum and make the center shelf adjustable. Using glue to fasten the shelves you might as well just use nails instead of screws to build it with. Elongating the holes and gluing the shelves isn't going to help you. It would only help if you were to use screws without the glue. In any case having the sides and shelves all out of solid wood with the grain running the same direction the risk of a problem is minimal.
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