I needed a way to strengthen the joints in the frame so that it’s strong enough to handle the weight and stress that will be put on it.
Glue is a lot stronger than wood, and the biscuit will increase the surface area the glue has to hold the joint together. It’s a nice alternative to metal fasteners and doesn’t take up any space outside of the joint.
Here’s a video of the process:
Ha! A real carpenter would do mortis and tennon!
Slick! Not great for heavy loads, but probably just right for that use.