Depending on how thick the plywood is you could use a biscuit.
How to join plywood sheets together.
Standard change makers currency change machines and entry systems.
Make a hole then screw the wood pieces together.
How to join two pieces of plywood together.
Finger joints connect two plywood panels together to make one longer panel.
You d also need a pretty accurate biscuit jointer because the thin veneer layer on the plywood doesn t allow much room for sanding out any inaccuracies.
How to join two pieces of plywood together.
However you need to drill multiple holes for securing the joining properly.
A hybrid joint would be another possible method of joining plywood panels together.
The top piece has the best side up the bottom best side down.
They then can be flipped and glued together.
For instance to get an 8 1 scarf on half inch plywood they would be offset 4 inches.
In this video you will get how to join two plywood pieces together side by side for utilizing the wastage or cutting part of the plywood.
Mark 4 inches on the top piece and then with a belt sander and coarse sandpaper sand them both down so there is a continuous surface.
Clamping it might be somewhat of a challenge.
This is a fast way of attaching the wood pieces end to end.
By keeping the hole hidden the joining is barely felt.
For this method edge glue the plywood together create a shallow bevel along the joint on both sides of the plywood and then reinforce the joint with a layer or two of fiberglass on each side of the joint.