Reply by BobAnderton

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Posted on edge gluing plywood?

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298 posts in 3296 days

#1 posted 08-25-2019 02:13 PM

I’ve found edge glued plywood to be a surprisingly weak joint. I mean, I expected it to be weak, but I was surprised at how readily it broke at the joint. I use biscuits when I’m edge joining 3/4 birch plywood and the structure of what I’m building will provide structure to the piece and that works pretty well. I think that’s a decent tip because then you can make any size piece you need. Now, putting a biscuit in 1/2” ply may be a little tricky and maybe less effective because it will leave just 3/16 on each side of the biscuit. It will be stronger than just edge gluing the ply though. I know people say biscuits don’t add strength, but in this case I think it does because you’re pretty much down in the weeds on strength with edge gluing plywood.

-- Bob Anderton - Austin, TX - Nova 3000 lathe, Alaskan Mark III mill, Husqavarna Saw

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