Have a large woodworking project and not enough pipe clamps to hold it together?

Simple Ratchet straps can work. Here is a parametric corner bracket to make strap clamps work well.

This thing features a glue expansion area in the corner so you don't glue your clamp to your work. It can hook over your strap so it won't fall while you are positioning all of your parts and clamps. It can also be made for many of your common angles for more than just a 4 sided box!

Take some measurements of your strap & key them in.

Set your angle & print one. If it's how you like it, print the other three.

I have to work out some issues for the non-90 degree angles. It's usable, just not as pretty as it should be.