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I have another question if you all aren't tired of me yet. I want to make a kitchen table and have come up with this design for the top. Question: would the movement of the wood ruin this in the long term? Or does the wood have enough room to move around if you just glue the boards together. I'm concerned about the different grain directions. Would some kinds of hardwood be worse than others?

 

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you can make it real quick and easy with engineered wood. find one with a thick laminate or laminate it yourself.

you could actually make it from flooring on ply. (prolly not lumberjock pure options there.)
 

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This is Easy!!

I made one quite similar over a year ago. Hexagon, 3-6"' Tip To Tip. From REAL wood. 1"x6" Solid Notty Pine Top, which is not the most stable wood in the world.

Used Biscuits Joiners & Edge Glue, wherever possibble. 1/2" G1S Fir Ply Under it (Bottom) same Outside Pattern naturally. Glued Top & Bottom together with Titebond lll. Then right away, about a 4" spacing pattern all around of 1" Drwall screws from Underside & Up into Top.

Played around with 3 Different Patterns of Pine Crown Mold until I had one that would look nice as an Edging. Cut, Fit, Glue and Small Brads to hold the Edge in place. Sanded. DONE! (Except Stain & Poly)

Had an Old, 3 Legged Pine Base, that was stripped to bare wood, that it was attached to. Then all was Stained , and Finished with 3 coats of Wipe On Poly.

Pine Top, after a Year has NOT moved at all.
 

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Here is my version. Edge glued, glued and screwed immediately on 3/4 plywood base. The outside boards are also fastened with pocket screws. It hasn't moved a bit. I chamfered all edges to 45. I just posted in my projects. Have a look if you want.
 

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Wonderful design. I would think it possible to do, but the long-to-end grain connection is troublesome. I would recommend making the 4 quarter panels as solid pieces, with an elongated tenon and mortise along the long-to-end grain connection; then attaching them to each other with inset "figure 8" connectors to allow for the movement.
 

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A related question. I wonder if there is a commercially available solution/system to accommodate movement that would allow the boards to be screwed to an MDF base (fixed along one side/length only and slotted the other to leave scope for movement) with an appropriate expansion gap between them?

T&G planking enables the same function, but you really wouldn't want grooves in the table top. You could fill the gaps with silicone, but my experience from flooring is that the exposed surface doesn't wear that well. The other issue is that as the joint closes it will tend to bulge upwards unless you design it so that there is a space within the joint to accommodate the volume reduction.

Cork strip is the tsock solution for flooring around here, but it doesn't accommodate much movement and anyway would not deliver much by way of a working surface.

Something like a urethane tube or extruded hollow section urethane strip let into semi circular or other channels in the edges of the board might have some potential too.

Something wooden would be nicest of all…

ian
 

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Discussion Starter · #16 ·
Thanks to all of you for sharing your knowledge and experiences. I am not going to make this anytime soon, I was just playing around on sketchup, although it is certainly a project that I will attempt in the future, maybe in a year when I have a bit more experience. It's good that I asked and drew in Sketchup first before actually getting the wood and cutting it all.

What I eventually want to make is an expandable octagonal table with one or two leaves. The diameter of the small octagonal would be 36", which would expand to 60" with a 24" leaf. I may try 42" but I need to measure the kitchen first when all appliances, countertops and cabinets are installed.
 

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To get a long lasting job you can only really use veneer up to 1/16" in that orientation any thicker & it will move shrink expand & buckle if you glue solid panels they will split I promise "Maybe not today, Maybe not tomorrow ,but one day"
Best regards
Trevor
 
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