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joining 3/16 birch ply?????

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joining 3/16 birch ply?????

Old 08-19-2002, 10:41 AM
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Default joining 3/16 birch ply?????

hi i am working on a project that requires 3/16 birch ply longer than i am able to purchase i can only get it 48 inches long so i need to join 2 together end on end anyone have any sugestions on a neatly done jopining of 2 pieces of ply? thank you
Old 08-19-2002, 11:17 AM
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Default Hmmm...

A finger joint or scarf joint would probably be your best bets...

Argh! I tried to show what I meant, in case you don't know...
but the spacing doesn't hold up. Sorry.

Goto google... type these words in the line and hit enter:

plywood finger scarf butt

There are a couple links which illustrate the joints there.
Old 08-19-2002, 02:10 PM
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Default joining 3/16 birch ply?????

Something like this should work...
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Old 08-20-2002, 02:20 PM
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Default joining 3/16 birch ply?????

Curious, what will it be used for?
I recent had the same issue with a Lite ply fuselage side on my CL 415. So I made the "Butt" joint at a long as possible angle and reinforced it with 1/16 aircraft ply x 2"wide doubler on the inside.
Old 08-21-2002, 04:01 AM
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Default joining 3/16 birch ply?????

Well, the BEST joint would be one that would take out the center plys and then glue in a thin piece, on large stock I'd use a biscuit, but with thin stock the only way I can think of is to use a wing cutter on a router table, then use a piece of 1/16th ply as the joiner. A good carpenter's wood glue would suffice for adhesion if you clamp the joint properly.

I've done this on 1/4' ply and it works fine, just a lot of work to set up the router table etc.
Old 08-21-2002, 09:14 AM
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Default Joining

When I join long boards I like using a puzzle cut. I take and draw an oval on the piece then draw a line the width of the sheet cutting across the oval abt 1/4th of the way. then clamp the 2 boards together and cut them out this leaves a jigsaw puzzle like male and female on the 2 parts add glue and join. By using the oval puzzle method it adds a lot of strength to the part lengthwise as well as width wise.


Sorry 5am not been to bed yet so if it sounds confusing hoepefully i didnt explain it all that bad
Old 08-22-2002, 01:35 PM
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Default joining 3/16 birch ply?????

Those are good suggestions but HighFlyer, have you checked with a custom kitchen and bath company? I have some 1/8" birch ply in 5' lengths that I got from those guys, and they had longer stuff, too.

They also fix me up with formica for my foam cutting needs and they have good ideas about clamping and glueing (now if they'd just let me move into their workshop... :idea: )

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