Joining angled pieces

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Forum topic by Aviator1411 posted 08-05-2011 02:51 PM 4460 views 0 times favorited 11 replies Add to Favorites Watch
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1 post in 2661 days

08-05-2011 02:51 PM

I am wanting to build an 4 sections (quarter sections that will be later joined together to form a circle. The pieces are 18 inches tall, made out of 2×12s. I want to join pieces of wood that are cut to 30 degrees of both sides of each board. Doweling is out because of the angle and pretty much so are biscuits for the same reason. I’m afraid that just glueing the butt joints won’t be strong enough. Any suggestions?

11 replies so far

View JimF's profile


144 posts in 3467 days

#1 posted 08-05-2011 08:19 PM

I tried to figure out what you are trying to do here, but I must be having a senior moment. I can’t visualize the pieces and how they go together. Anyway, based on making long joints to join two adjacent boards, I think you might be able to use splines to join the pieces. You will have to adjust at the narrow end (Is there such a thing as a stopped spline?). And if you wanted to hide the splines at the outer rim, something similar would be required. Except for the stopped part, it could be done on a table saw, but be very careful with the odd shapes.

If this doesn’t help with your problem, it at least bumps you to back to the front page where someone smarter can help.

-- Insert clever tag line here

View helluvawreck's profile


32087 posts in 3040 days

#2 posted 08-05-2011 08:40 PM

I think I have what you are saying pictured in my head but I may be wrong.

I have done this sort of thing with biscuits before and it was not that difficult. I just built a simple jig to hold everything straight until it dried.

However, there was a conversation on LJs a while back about the best way to do something similar and it was a very good discussion. Some of the more experienced LJs suggested using tape to help fold up and hold together the joints. This actually seems like a better way to do it than what I did.

I’m not very good with the LJ search button so I don’t know how to get to that discussion. Hopefully some of the guys will remember that recent discussion. Otherwise perhaps they will just chime into this discussion.

When you glue the four assemblies together perhaps you might use the ratchet tie down clamps or similar type woodworking clamps (can’t remember common name for them). Anyways, sorry I could not be of better help. I just can’t find that discussion.

-- helluvawreck aka Charles,

View lcurrent's profile


125 posts in 3989 days

#3 posted 08-05-2011 09:51 PM

My mortising jig will do it send me email, you can use it or I will send photos to make your own.

-- lcurrent ( It's not a mistake till you run out of wood )

View LONGHAIR's profile


94 posts in 3988 days

#4 posted 08-06-2011 01:03 AM

”The pieces are 18 inches tall, made out of 2×12s. I want to join pieces of wood that are cut to 30 degrees of both sides of each board.”

I’m seeing this as the key here. This would be a long-grain glue-up, so there really is no need for anything. It would be plenty strong enough with just glue alone.

View Howie's profile


2656 posts in 3097 days

#5 posted 08-06-2011 01:18 AM

You could use a slot cutter and bisquits.Would be an easy way to hide the bisquits.Alignment would not be a problem that way.

-- Life is good.

View oluf's profile


260 posts in 3213 days

#6 posted 08-06-2011 06:01 AM

A Kreg jig and pocket screws should work fine. You will have to make a wedge block to attach the drill jig to to make the pocket screw holes. Use a scrap wood set up to find the correct screw legnth for the angle you are going through.

-- Nils, So. Central MI. Wood is honest.Take the effort to understand what it has to tell you before you try to change it.

View lcurrent's profile


125 posts in 3989 days

#7 posted 08-06-2011 04:09 PM

Floating tenon up to 4 inch stock

-- lcurrent ( It's not a mistake till you run out of wood )

View richgreer's profile


4541 posts in 3248 days

#8 posted 08-06-2011 08:47 PM

I’ve done this with oak. Here is what I did.

I glued the pieces up before I cut the circle out of them. At each joint there will be some waste material that will eventually be cut off when you cut the circle. I drilled 2 holes in each piece in the waste material and put dowels in these holes vertically (about 2 inches exposed on the top and bottom). I then did a dowel joint. In my case, I used 4 dowels for the joint that were evenly spaced.

You can use the vertical dowels for 4 clamps and pull this thing together. By adjusting the clamping pressure on the bottom and top, you can be sure to keep them perfectly flat.

I had one situation where I did not have enough waste material available so I glued a “wing” on and cut it off later.

Dowels or loose tenons are the way to go.

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

View Vicki's profile


1106 posts in 3518 days

#9 posted 08-07-2011 05:50 PM

I’m having trouble visualizing what you’re trying to make, but I’d give biscuits a second thought. They can be used for angles, at least 45 deg. ones. I made a wishing well with 2X4’s cut on an angle to make the ‘circle’. I used glue and my nail gun and it’s doing fine 4 yrs later.

-- Vicki on the Eastern Shore of MD

View TopamaxSurvivor's profile


18380 posts in 3850 days

#10 posted 08-07-2011 07:39 PM

Once in a while, I use a little brad that is in a place out of the way where it will never be hit if future cutting is needed. Pre-drill one side, drive it in and leave a little bit of point sticking out. It will catch, maintain alignment while the glue dries.

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View Richard's profile


1922 posts in 2864 days

#11 posted 08-07-2011 08:22 PM

I would agree with Howie . use a slot cutter ( on a routertable) and put biscuits in. Really your biscuit joiner should adjust enough to do this. I have used biscuits to do 8 sided planter boxes and they work great.

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