The simple Saw Horse (Sawhorse?)

Step 8 Cutting the Braces.

I recommend cutting each brace to length one at a time, lumber is not always the same from piece to piece.  Cut the 15 degree angle on one end. Line it up with the top rail, mark the other end of the brace for length, and mark the angle with your 15 degree jig. Since this is a project is being built with rather loose tolerances, I recommend numbering the braces as you go. Especially if you are building more then one at a time as it will avoid confusion.