What is this joint called and how would you make it?

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Forum topic by ssbothwell posted 112 days ago 851 views 2 times favorited 9 replies Add to Favorites Watch
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13 posts in 1689 days

112 days ago

This joint is really common in stretcher bars for canvas paintings. I’m having trouble working out how to the joint is made. I guess its a variation on a bridle joint.

its not clear in this photo but one of the faces is cut to a slight bevel (usually between 6 and 12 degrees).

9 replies so far

View JayT's profile


2088 posts in 809 days

#1 posted 112 days ago

I believe it is a mitered bridle joint.

Edit: I stand corrected. Here it is shown as a mitered double bridle joint.

-- "The American Republic will endure until the day Congress discovers that it can bribe the public with the public's money." Alexis de Tocqueville, 1835

View dbhost's profile


5378 posts in 1830 days

#2 posted 112 days ago

I am pretty sure that joint is called a “Folded Miter Joint”. And while I have never made (or personally seen one up close and persona), I do believe either Shopnotes, or Wood Magazine a while back had a HOWTO article on those… Looks like a very strong, but somewhat difficult to make joint…

-- My workshop blog can be found at

View bandit571's profile


6652 posts in 1282 days

#3 posted 112 days ago

Think more along the lines of a mitered half lap joint. Then cut out about half of each lap. Cut the slot for the lap to go into the corner. Lay out the miter first, but only a quarter of the way down. Each lap is also a quarter of the thickness. Miter=1/4, lap=1/4,slot= 1/4, and the other miter = 1/4 of the board’s thickness. be sure to mark where each part goes, THEN cut with a saw.

-- A Planer? I'M the planer, this is what I use

View patron's profile


12956 posts in 1939 days

#4 posted 111 days ago

after the joint itself is done
then do the face bevel
as you will need the parts to be square
for the joint themselves

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

View steve_in_ohio's profile


1017 posts in 209 days

#5 posted 111 days ago

here is something very similar that shows you how to make it

-- steve, simple and effective woodworking---

View bigblockyeti's profile


1374 posts in 319 days

#6 posted 111 days ago

I agree with the first post of it being a mitered double bridle joint. I would make it using a tenoning jig on the tablesaw.

View Grumpymike's profile


1003 posts in 913 days

#7 posted 111 days ago

I’ve heard it called as Jay T says a “Mitered Bridle joint”, and as someone said a “Double Miter Bridal”.

A half lap would be one piece cut half way through on a 45 and the other piece the reciprocal.

A bridal joint is one piece with two sides (think open ended mortise) and the other is like a tenon, and slides into the mortise.

So, with all that being said, It’s a “Mitered Double Bridal Joint” That’s my story and I’m sticking to it …

-- Grumpy old guy, and lookin' good Doin' it.

View ssbothwell's profile


13 posts in 1689 days

#8 posted 111 days ago

whoa, thanks for all the information! this just about covers it. i’ll have to play around with my tenon jig and see if i can figure it out.

these joints get mass produced on an industrial scale for all the stretcher bars sold at every art store in the world so there must be a pretty simple way of cutting it.

View Grumpymike's profile


1003 posts in 913 days

#9 posted 111 days ago

Called an old high school chum that worked in a frame factory till he retired. He says that they made the Double Bridle miters on a ‘shaper’ with multiple sets of heads … (As you know a shaper is like a giant router).

I would really like to see how you do on this scary looking joint … in the mean time I will be playing in my shop to see what I can do.

-- Grumpy old guy, and lookin' good Doin' it.

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