Woodworking newby here.
some 15 odd year ago I had a desk made for me from 30mm birch plywood. It was too big and heavy to be kept in one piece so it was cut in two pieces. Joining was done with steel profiles, threaded rods and nuts, and biscuits for alignment. I have decided that I want to make a smaller one-piece desktop out of this material.
I have cut away all pieces that I do not want to use. I'm left with two pieces of desktop roughly sized 600mm by 1200mm. The cuts were made with the TS55 and a home-made MFT top acting as a square, so I'm quite confident the pieces are square in both planes.
What is the best way to join these pieces and achieve a strength comparable to an uncut board? I think a simple butt-joint might not be enough. I do not have a domino and cannot afford one at the moment. I do have a cheapo biscuit joiner, but I doubt the biscuits will add any structural strength.
My idea would be to take the router and cut a mortise and tenon over almost the whole length of the surface to be joined, maybe 5cm deep. Will this add to the strength, or is it not going to give additional strength over a butt-joint?
Other suggestions are very welcome.