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Forum topic by Chris posted 11-12-2011 06:39 PM 1183 views 0 times favorited 24 replies Add to Favorites Watch
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Chris

1867 posts in 2677 days


11-12-2011 06:39 PM

Topic tags/keywords: olive slab joint maple coffee table

I recently came into possession of a beautiful Olive slab (5ft x 18”). It has natural edges and begs to be the absolute focal point of what I build with it.

Having said that I am designing a coffee table and want to have a structure that isn’t to square and heavy to the eye. This is what I am considering….

They are going to be cut from Hard Maple for the strength and lack of grain character. My problem is how to join the upper and lower section of each leg assembly.

As I have only built case work prior to this I seek your insight and welcome your opinions.

-- "Everything that is great and inspiring is created by the individual who labors in freedom" -- Albert Einstein


24 replies so far

View richgreer's profile

richgreer

4524 posts in 1761 days


#1 posted 11-12-2011 06:59 PM

Option 1

I would drill holes from the bottom that go almost, but not quite, all the way through both pieces. Then I would drive dowels, with glue, into those holes.

Two dowels is probably enough, but I would use 3 for good measure.

Option 2

Drill holes with a Kreg (stepped) drill bit from the bottom. The shoulder of the drill bit should go about half way through the bottom piece. Use Kreg screws to secure the connection. Plug the holes. I’d use 4 or 5 screws with this approach.

-- Rich, Cedar Rapids, IA - I'm a woodworker. I don't create beauty, I reveal it.

View ShaneA's profile

ShaneA

5347 posts in 1284 days


#2 posted 11-12-2011 07:08 PM

I like option 2 from Rich, if no kreg setup, a forstner bit then pilot holes, quality screw, then plug the hole w/proper sized dowel

View Beginningwoodworker's profile

Beginningwoodworker

13342 posts in 2359 days


#3 posted 11-12-2011 07:15 PM

Screws might be the best bet.

-- CJIII Future cabinetmaker

View TMcG's profile

TMcG

182 posts in 1687 days


#4 posted 11-12-2011 07:22 PM

You could get a pretty nice mortise & tenon across that 6”, pegged would make a nice accent as well perhaps ?

-- http://wood.mcgivern.org

View Sawdust4Blood's profile

Sawdust4Blood

348 posts in 1708 days


#5 posted 11-12-2011 07:27 PM

Rich’s idea will work for joining the two parabolas. I would be more concerned with lateral strength though.

-- Greg, Severn MD

View HamS's profile

HamS

1168 posts in 1075 days


#6 posted 11-12-2011 08:38 PM

I think I would put a stretcher between the leg sat the joint. If you have any scraps of the olive wood left after whatever trimming you have to do it might be an interesting touch to put a double dove tail right at the intersection of the arcs of the leg with a bit of the olive wood.

-- My mother named me Hamilton, I have been trying to earn my nickname ever since.

View interpim's profile

interpim

1133 posts in 2145 days


#7 posted 11-12-2011 08:39 PM

not sure how set on the design you are, but what if you overlapped the apexes and did a half lap… if you don’t understand what I’m talking about, imagine the top arch and bottom arch overlap enough to create a small football shape in between the two parts.

-- San Diego, CA

View Chris 's profile

Chris

1867 posts in 2677 days


#8 posted 11-12-2011 08:44 PM

How do you mean Greg?

-- "Everything that is great and inspiring is created by the individual who labors in freedom" -- Albert Einstein

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Chris

1867 posts in 2677 days


#9 posted 11-12-2011 08:45 PM

Interpim,

I hadn’t thought of that one; it has interesting possibilities.

-- "Everything that is great and inspiring is created by the individual who labors in freedom" -- Albert Einstein

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Chris

1867 posts in 2677 days


#10 posted 11-12-2011 08:47 PM

FYI I will have a stretcher between the sets of legs….

Rich, I like the dowel idea. Was thinking possibly a loose tenon type of joint as well. But, I do see how the screws actually might be easier to pull off.

-- "Everything that is great and inspiring is created by the individual who labors in freedom" -- Albert Einstein

View DLCW's profile

DLCW

527 posts in 1340 days


#11 posted 11-12-2011 10:36 PM

I think I would use a combination of dowels and screws to hold it together. Probably 1/2” dowels and #12 screws. I would use epoxy in the joint to add some additional strength to the dowels and screws.

-- Don, Diamond Lake Custom Woodworks - http://www.dlwoodworks.com - "If you make something idiot proof, all they do is make a better idiot"

View Bill White's profile

Bill White

3496 posts in 2647 days


#12 posted 11-12-2011 10:54 PM

YOU SUCK!!!!!
How dare you show us that wonderful piece of wood?
Be sure to send pics of the finished table. Man, that’s gonna be special. I wish I had your quandry.
Bill

-- bill@magraphics.us

View Howie's profile

Howie

2656 posts in 1609 days


#13 posted 11-12-2011 11:08 PM

I’d go with the dowels or loose tenons. I think you would gain more strenght in the joints.

-- Life is good.

View Chris 's profile

Chris

1867 posts in 2677 days


#14 posted 11-12-2011 11:13 PM

Bill,

That “Quandry” came at a price. :) I will post the project though

-- "Everything that is great and inspiring is created by the individual who labors in freedom" -- Albert Einstein

View Sawdust4Blood's profile

Sawdust4Blood

348 posts in 1708 days


#15 posted 11-13-2011 03:27 AM

okay Chris, the stretcher answers the question. As I was looking at the second of your design drawings, I see strength against a force coming down parallel to the blue axis and I see sufficient strength against a force coming parallel to the red axis, but without the stretcher I didn’t see anything to keep the two sets of legs from collapsing against a force coming parallel to the green axis. The stretcher should serve that purpose.

-- Greg, Severn MD

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