For this tutorial, you will need:
To build the raised beds, begin by measuring one 2x12x12 board to a length of 35 1/2" for the planter box end pieces. Use a framing square and a pencil to mark for your cut. Then, using a circular saw, make the cut. You'll need two end pieces for each box. For the bed sides no cuts are necessary, use the entire 12' length. This will make your planter box 12' long by 3' wide.
Once all of the wood is laid out, pre-drill holes in the side pieces using a cordless drill and a 1/8" drill bit. These holes will prevent the wood from splitting when you attach the side pieces to the end pieces. Next, using 3" galvanized wood screws, attach the two pieces. Repeat these building steps for each planter box.
Place chicken wire on the bottom of the bed to prevent animals from digging up into the raised garden bed. Be sure to place weed wrapping as well. Keeping weeds out of your garden is critical to its success since weeds steal moisture and nutrients away from the vegetables.
With all the beds in position, use appropriate measured stakes to keep the beds in place. Drive the stakes into the ground until even with the top of the bed. Next, attach it to raised bed using 2" screws. The stakes will prevent the beds from moving as soil is put into them.