Sawhorses are indispensable for a normal household or a shop. You can use them for painting, work piece support, work bench support with a piece of plywood or door, and with a little imagination, they can be used in many other different ways like magic. The folding sawhorses are particularly valuable, as they can be stored with very minimum space, carried in your vehicle, and set up quickly when you need them.
There are many ways to make folding sawhorses, and it’s not the intention to claim that this is the best way, it's just my way of doing it. If somehow there’s a design details that has been seeing somewhere else, that means either the design was inspired by the other fellow designer's creative mind, which is really appreciated, or all good engineers follow the same physics & design principle - simple, functional, most efficient in strength and maximize material usage. I am sure there are some rooms for improvement for this project, please comment with your idea, and we’ll make it better – will try to make another pair in the near future if necessary.
One more thing to take consideration, the sawhorses were not tested to see how much weight that they can hold up, except I only jumped up and down on one of them with my 175lb body, so they can probably hold at least 200lb each without a problem.