Diy Wood Arch . Don't worry, drawing the arch will not require you to do any math. The first thing to choose is what angle you want to cut your wood at. 8 DIY Garden Arch Plans to Frame Your Beautiful Garden from morningchores.com Cordless drill, handsaw, circular saw, level, jigsaw, orbital sander, and tape measure. 1 2x4x8 piece of wood. Don't worry, drawing the arch will not require you to do any math.