I did not invent this technique, but use it often when building structures that have been cut out on a 2D laser. The example is in .25" steel, but will work in MDF and other materials.
Basically, you use tabs and slots to locate the parts in 90 degree plains. A hole in one part and a cutout that holds a hex nut in the other provide the gripping power. This method is astonishing easy and reliable. Try it if you need a joint.
21 Likes
Dont forget to round out (“dogbone”) your corners so you dont get stress fractures, especially if using acrylic:
stole these from this article:
14 Likes
I would use stainless fender washers on the acrylic/nut interface.
2 Likes