Joining two boards together - Woodworking Talk - Woodworkers Forum

 
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post #1 of 15 Old 09-30-2010, 08:56 PM Thread Starter
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Joining two boards together

I'm new to the board and I know this topic has been discussed, but of course I think my situation completely different, probably not but I'm going ahead anyways. I have two 2" thick by 19" wide newly cut pine.
I thought I should put some kind long rods in for strength, but every thing I've read say that just gluing and clamping is all I need to do. I would like to heard anyone's thoughts.
Thanks
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post #2 of 15 Old 09-30-2010, 09:16 PM
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2" thick by 19" wide solid pine planks?

Have they been properly dried?

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OH, wait a minute ............Yep!.............That's what he said!

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post #3 of 15 Old 10-01-2010, 12:30 AM
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Question

How do you want to join them? edge to edge? end to end? face to face?
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post #4 of 15 Old 10-01-2010, 12:41 AM
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What' the intended use?

You have provided way too little information

You can never have too much pepperoni on your pizza or own too many clamps.
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post #5 of 15 Old 10-01-2010, 01:29 AM
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While more info will yield a better answer, I think we just like to make people work for there answers.

I'm guessing from your post that there amy be a chance that they are not properly dried yet. If so I'm not sure what to do. Assuming your talking edge to edge and not a end to end for this joint. usually edge gluing is enough but with it being 2" thick I would think of maybe adding a spline the legth of the joint to help with alignment and strength. Just my .02
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post #6 of 15 Old 10-01-2010, 03:01 AM
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I had to do this to make a large shelf. Used pocket screws and glue as one side hidden. Worked perfectly.
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post #7 of 15 Old 10-01-2010, 12:28 PM Thread Starter
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Not dry yet, edge to edge, two (2"x19"x48") making a kitchen table top. Trying to stay away from screws.

Thanks for response
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post #8 of 15 Old 10-01-2010, 12:56 PM
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I would not even attempt it if they are not dry...







.
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post #9 of 15 Old 10-01-2010, 01:08 PM
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Just picking a species of pine (since I do not know what you have) White pine has a shrinkage factor of 6.1%. From say 30% moisture content (relatively fresh sawn) to 7% EMC (which it will reach in your home, probably drier)... a 19" board is going to shrink 0.952"+...so it's gonna be 18" wide in a few months.

That is a lot to try to overcome with any kind of joinery in a permanent installation.

Wood shrinkage calculator






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Last edited by Daren; 10-01-2010 at 01:33 PM.
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post #10 of 15 Old 10-01-2010, 01:25 PM Thread Starter
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I am going to wait until it dries over the winter. But just getting ready.
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post #11 of 15 Old 10-01-2010, 08:55 PM
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Quote:
Originally Posted by DOM12 View Post
I thought I should put some kind long rods in for strength, but every thing I've read say that just gluing and clamping is all I need to do.
Thanks
I'd go with your gut.
Dowel rods won't hurt a bit.
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post #12 of 15 Old 10-11-2010, 12:40 PM Thread Starter
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What do you mean by a "spline"?
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post #13 of 15 Old 10-11-2010, 12:59 PM Thread Starter
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Question

First of all, thanks for responses. I would also like to know about getting a true edge on the long grain side, I cannot touch the other side (it has bark on and I want to leave it that way).
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post #14 of 15 Old 10-11-2010, 01:08 PM
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A spline is a machined joint that looks like this:
.

http://www.hobbithouseinc.com/person...rms.htm#spline






.
.
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post #15 of 15 Old 10-12-2010, 10:14 AM
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good answer, Cman ...

You can never have too much pepperoni on your pizza or own too many clamps.
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